Water Under Floor Mats

TDH and direct electric heating and heat pump

At this point, and conveniently separate elections and should not be anyone who is not aware of the already implemented but not imminent demise of the old night rate and its replacement by the rate of Discrimination Time (TDH) . In what may not yet have noticed around the world still is the corresponding deterioration of the normal rate. all started in 2006 (at least it comes in BOE Rates of December 22, 2006) where a friendly wizard cabinet is pulled off a penalty for excess usage for the normal rate, the consumption of more than 1.300kWh in two months, had to pay (each kWh that is passed ) extra € 0'013 (before taxes, totaling 22% of the electricity to be added later: even pay an excise tax). Without having followed all the steps, at least in the Official Gazette of June 30, 2007, the surcharge is the same but for 1.100kWh consumption over a quarter. Because he must still be a friend without content after the scam legal (for now) the end of the night rate, since the last However, the existing to today, is considered excessive consumption exceeding 500kWh a month, with an extra cost (per kWh more) of 0'027403 € (yes, no bizqueéis, more than double). Given these developments, the only good news is that the regulation of electricity tariffs has its days numbered. Anyway, just in case, and because it no longer rent, you can diverge your little use at night-morning, you have to spend the TDH: I already have done.

on if I am not green enough to appreciate the efforts of government to reduce our electricity consumption, at least in peak consumption hours, I must stress a few points:

1. The generation of electricity is substantially more green at night than day (I also think that it would be), if not going backwards. Take a look at the mix of production at the site of Spain's Red Electrica . In the peaks is when you normally get hydropower.
2. The green is really heating heat pump , who suffers from a surcharge on consumption (in addition to their total lack of promotion in the case of air / air or air / water), while the anti-ecological (in comparison) direct consumption of natural gas has absolutely no charge for excess usage, but on the contrary, the more consumption cheaper rates, just in reverse with household electricity.
   

data and assumptions

In the analysis of the efficiency of heating introduced as a first approximation to the impact of discrimination Hourly Rates (Residential) in the bill for electric heaters, both direct (radiators / emitting electric or battery) and heat pumps. Just in this article apply a uniform distribution of energy for heating independent of time zone, while in reality we have under temperatures at night than during the day with a consequent greater proportion of expenditure during the night than during the day. Well, in this article, I presume external temperature conditions of 7 ° C during the day (peak times of the TDH, which is 10 hours a day) and -7 ° C during the night and tomorrow (timetable Valley TDH, ie the other 14 hours a day), which, for a constant interior temperature of 21 ° C, resulting in a double heating power consumption at a time at night (difference of 21 ° C-(-7 ° C) = 28 ° C) in one hour daytime (difference of 21 ° C-7 ° C = 14 ° C), considering the heat losses proportional to the difference temperature. In practice, if we consider the reduction of heat loss from the glazing (windows and glass doors) to lower the blinds at dusk, then night would be somewhat lower consumption.

addition, I felt more power contracted for those systems most in need of power consumption, setting arbitrarily 4'8kW in the case of the heat pump efficiency 350% (on top-water, ie geothermal); the rest, depending on how much electrical power consumption at higher night about geothermal, and increase their contracted power (and we all know, except the horny Mr. Minister, that the power will go based on what increases can electric current 5A). The choice, though arbitrartia, follows a certain logic: just because it's 250% efficiency (in principle air / water or air / air) has already contracted 5'75kW power, which corresponds to the installation in our house we have two dual-split air / air, ie, 2 internal drives and 4 external (consoles), with a maximum power of about 2'4kW set.

In the latter type of heat pump (air / water or air / air), the average efficiency of 250%, I have considered the variation of efficiency with temperature, considering benefits fall to -7 ° C compared to 7 ° C than a third, more pessimistic an increase of 20% in power consumption due to defrost as I did in the first inning prejudices about heat pump. With this, and having fixed the average efficiency, get the values \u200b\u200bat 7 ° C, resulting in a COP of 3'97, and -7 ° C, resulting in a COP of 2,2. The first, 3'97 to 7 ° C, be pessimistic for at least one heat pump air / air situations COP Inverter rated at least 3'97, it would be working at a fairly low power output (550W power consumption and COP of this heat by swelling) where the pumps have yields than the rated (at least mine). The second, 2'2 to -7 ° C, as I said is also pessimistic in a modern heat pump defrost smart. In

be the case that in fact we have a heat pump air / air or air / water of the same electrical power for the case geothermal (1'25kW), then with the external temperature drop would not get to keep the temperature of the house. This case I have referred in the last column: A heat pump system supported by electrical resistance (about 1'6kW), which will need additional heat in that situation (evening-morning). This will obviously increase both consumption and the power to hire (under the conditions of the study). Resistance, or be included in the pump air / water well will be a simple radiator / emitter / electric fan heater air pump / air.


consumption comparison chart to TDH

cut score without some auxiliary rows and columns.


Here OpenOffice spreadsheet ( here to the mule, as the first, if you have problems notice), in case you want to play with some number, or simply get a better view this piece table .

[I add the 30/IV/2010 version, with fares (gone, for example, excessive consumption and the rate for three-phase regulated as such, or a power greater than 10kW) for the mule: worksheet OpenOffice ( link if you have not eMule or similar) and exportanción PDF file (ditto ). I also added from the percentage of consumption in night-morning hours offset passed to the TDH, roughly a little more than a quarter of electricity consumption.]

Comment

results If While operating conditions are truly dire (10 hours a day at 7 ° C and 14 to -7 ° C for 6 months), a system of heat pump air / air or air / water autonomous (with sufficient power to not require electrical support at any time) is only a 25% increase in spending for use in the case of geothermal heat pump (with pessimistic operating conditions for all cases). In this example, you could get independent power with a simple pair of heat pump air / air DC Power Inverter split small (1 kW power consumption) and can go out with each facility by about 1,200 € (which came out of my brother last month, and including VAT). Without putting it back again here in figure comparison of all types of heating can observe as the option of natural gas condensing boiler and biomass boiler are worse in consumption, although we include all expenses Fixed electricity in the heating bill. Moreover, given the unique operating conditions in this study, surprisingly, the consumption of the normal direct electrical heating (without batteries) with TDH is fully comparable with oil heating boiler at low temperature.

of and to have another heating system, we can see in the last column how it is not unthinkable to use the heat pump just as a saving on an existing installation, perhaps Radiator / electric emitters, the Scandinavian - Irish , simply placing the internal console in a central the house, and using any radiators / emitters electric (having to buy the cheapest ones that meet a minimum) or support if necessary (the pump performance to a drop in temperature is no longer sufficient) or to raise a rack in a particular room (with the thermostat set at the pump might to a degree more than in the radiators).

If the thermal conditions of winter in the area in which we live are far more gentle than stated, then no one should be surprised if the performance of the heat pump air / water or air / air to be totally comparable to that of a facility geothermal.

Cartier Diamond Trinity Ring

Prejudice on the heat pump I: do not work well for temperatures below 5 ° C

After displaying the competitiveness of heat pumps in both the ecological analysis as in the economic analysis heating systems, even being really pessimistic about the average yield and the distribution schedule consumption for time discrimination rate, I will spend the next posts to deny or update old perceptions incorrect or outdated for heat pumps. Specifically I will focus more on the defense of the air / air (heat sink or heat source external air / heat source or destination of heat the air inside the house), either version split (split system: outdoor unit -more-compressor unit, usually within the typical console-) or multisplit (ditto with several interior consoles), either version falsotecho indoor unit (usually) with subsequent heat distribution ducts. The main advantage of the first is the reduced work to be placed, while the latter makes a better distribution of heat that a split simple for less money than a multisplit , but usually with a lower efficiency (less heat exchange surface interior and greater fan power requirement of having to push the air ducts) possible loss of heat in the pipes (not should be more than 15% as much). By far the duct system is the most popular in the U.S. in houses, for example.

should be noted that the technology in other heating systems and achieved only marginal efficiency improvements. In heat pumps, especially in the home, has not yet come to approach the maximum theoretical limit operation of a machine based on Carnot cycle. Really experimental machines could be built to much closer than at present, although that, today, the use of gas would be unsafe and therefore undesirable. Well, just improved compressor designs and improvements in performance and control, such as DC Inverter systems, has achieved almost double the efficiencies of these machines in the last 30 years.


Efficiency and defrost

Certainly, the efficiency of heat pumps with the outside temperature drops, or, seen upside down, the efficiency is the greater the less the difference between internal and external temperature (temperature difference). Certainly, too, in this curve does not take into account the need for defrosting cycle heat pump, and the comment repeated over and over again says that in the defrost cycle loses much efficiency heat pump. Yes

in the heat exchanger of the outdoor unit can start to form ice when we go down to 5 ° C, and yes that old pump defrost cycles performed (switch to air conditioning mode, though usually by stopping the fan units internal to melt the ice) newspapers below a certain temperature, and yes this was a considerably higher power consumption. However, this increased consumption, in studies of the 80 , trace it, at most, 20% (the average of the studies was 8%). This means that the number of kWh of heat inflated divided by the number of kWh of electricity consumed, it passes decremented by 1-1 / (1 +20%) = 17%, ie, if for example the COP-1 C 2.5 would be without defrosting, now would be (I stress, 20% are pessimistic) 2.5 x (1-17%) = 2'08 having to defrost periodically. However, modern heat pumps do not defrost newspapers, but the control unit detects the presence of ice and only then start a defrost cycle. Fall


performance with temperature

On the other hand, and although modern heat pumps can meet minimum operating temperature of -5 ° C to -20 ° C, there is the belief that subzero temperatures and performance is very low. Well, actually COP corresponding to -7 ° C is actually more like 2 / 3 of that for +7 ° C, ie if we have a heat pump with COP at nominal conditions (7 ° C ) of 4, the COP to -7 ° C will be closer to 4 x 2 / 3 = 2'66, or if we consider a pessimistic 20% increase in defrost, of 2'66 / 1'2 = 2'22. That is, even under these conditions the heat pump would be providing at least 2'22 kWh of heat per kWh electricity consumed. If we further assume that the temperature of -7 ° C or lower will take place at night, we take advantage of the TDH to compensate for the lower efficiency at the lowest cost per kWh.

Even in the possible situation where the heat comes not provided by the heat pump (have undersized, with few units or the same low power), we will support those nights in simple (and cheap) electric heaters (oil well , or halogen, or fan heaters) to which we can add in your plug one also inexpensive thermostat if it were built. Assuming that the heat was keeping x , then the overall efficiency would be along the lines of (2'22 + (x '22 -2)) / (1 + (x -2 '22) ), that x = 4 (to put something, if we are right sized for the nominal conditions of 7 ° C) would give us even a 1'44 kWh-calor/kWh-eléctrico efficiency, not bad value if you also Valley are paying the price.


Power output and efficiency

The POPs listed in the specifications of heat pumps is measured in nominal conditions of temperature and external humidity and temperature, is measured for a working power close to the maximum, ie close to be delivering all the heat as possible inside the house. Well, normal for a DC inverter heat pump is to be working at a point close to equilibrium, ie, delivering almost exactly the heat you're losing the house or room and therefore must be replenished, otherwise we undersized the heat pump, then it will be working to lower the nominal power, and therefore, at least one of the commercial models (have to see the specs sheet for each one in particular, to see if the ranges specified of power delivered and consumed, with which you can do calculation), this implies a greater efficiency at nominal COP. This stems directly from the reduced need to use fans in the indoor and outdoor units to exchange less heat.

For example, my heat pump split dual- , 4'35 have a COP of delivering rated power, but greater efficiency to 5 to deliver the minimum power. Conclusion



Even with moderately severe weather, while it does not involve freezing temperatures far beyond the nights (14 hour rate valley), using heat pump Hourly Rate Discrimination, supplemented by any radiators Electric, is a highly competitive both economically and ecologically.

Flowerbomb Or Hanae Mori?

economic heat, heating

Having assessed the actual environmental impact (it can not contaminate not only the door of your house), I now promised, the economic analysis of each major type of heating. Yes, obviaré installation costs in the analysis, and talk only of consumer spending.

googleáis If looking for "comparative heating, probably even bear to a page that holds an old consumption analysis of Union Fenosa in 2003. Although outdated, it is a first reference to see where the shots go, but obviously it was before the night rate to what is now Time Discrimination Rate (Residential) is an odd distance, and fuel costs are going to say.

data and assumptions


Links to the source of prices, taken yesterday: heating oil price, gas rate family, price and features pellets (these data, the cost of pellets and its calorific value, are very varied, which take it as a simple ejemplillo) electricity tariffs (taxes painful watching Fenosa).

In combustion systems, the most efficient oil boiler or low temperature natural gas boiler condensate, involve working with the water system at a low temperature, not exceeding 40 º C. This implies the need to plant or oversized radiators at least 50%, or underfloor heating.

The boiler efficiency condensing natural gas is given on the lower heating value (LHV), when the whole is a result of combustion in the gas phase, while if it gets enough to take the heat in the flue gas finished condensing water, it recovers enough heat ( adds a PCI 11% in natural gas, only 6% for diesel due to its lower proportion of atomic hydrogen), and therefore leaves us efficiency greater than 100%, if we had measured in relation to the gross calorific value (upper limit that takes into account the condensation of water) would have given less than 100%, as expected. The heat produced by condensation is best understood backwards: to dry hands under a hair dryer, will not feel the heat (temperature) until they are dry, that is, while all the heat (energy) absorbed by the water to evaporate, is that heat (energy) that condensation is recovered either in the above result boiler combustion, heat pumps well-focused source of heat outside air when it already has a high relative humidity.

contracted power electrical systems I have set all to 5'75kW (its cost is included in the annual cost), but really expect a major power necessary for radiators / emitters direct electric heat pumps, and more for batteries (have to load all the warmth of days -10 hours, during the night -14 hours-) than for electric heaters. Of course radiators / emitters I mean from electric stoves electric oil heaters and heat halogen colorful (blue, green or whatever), and yes, everyone has an efficiency in heat generation of electricity from virtually 100% (virtually put if you really could measure the tiny part that electromagnetic radiation can escape.)

Regarding the distribution of consumption for Time Discrimination Rate (Residential) for all radiators / emitters, electric and heat pumps, this time, unlike ecological analysis of the heating , I must say that I have taken a pessimistic approach evenly distributing consumption 24 hours a day. Without doubt consumption of the heating on at the same temperature 24 hours, will be much higher at night and early morning (fare valley) during the day (price point), so expect better results than those exposed in these cases and we consider worst case. Moreover, in the case of heat pump with heat source of origin (the cold) air external , the effect will be even more pronounced, since the efficiency of these increases when the temperature difference between inside and abroad decreases, ie, when electricity is more expensive. It can also be seen that the impact of the TDH is more pronounced (not proportional) the higher the consumption, this is due to the wonderful charge for excess consumption of the normal rate, which penalizes (from the last rate change) consumption over 500kWh in a month. In this case, normal rate, the figures given more electric heating costs will be worse.

efficiency of heat pumps that I have had the two values, pessimistic, discussed in ecological analysis. Certainly a heat pump-water or water / water (the cold / hot reservoir, or heat source / destination of the heat) will most certainly a COP (Coefficient Of Performance , inflated by heat kWh electric kWh consumed) held (given the almost constant temperature of the cold) over 4 and in any case this type of heat pump is usually installed with underfloor heating, but certainly also be done with consoles and distributing guess (the latter not I've seen mentioned anywhere) through conduits (pipes usually by bringing the ceiling hot air).

Regarding heat pumps air / water (equal distribution of heat than the land / water and water / water) and air / air (typical reversible air conditioning distribution ducts inside or console), although its efficiency will vary along day with outside temperature, average efficiencies expected 250% best shown in the table. The air / water because they have sufficiently long periods of operation (can be sufficient room temperature water circuit on and off infrequently), while the air / DC Inverter air if it is kept in an operating system provide almost exactly the heat lost, which have fewer cycles on / off (in normal conditions until the quench any). Therefore expected average efficiencies of more than 3 machines COP Inverter DC (nominal position of 7 º C and 70% humidity outside, and 21 ° C inside blowing a rated capacity close to maximum) of 4 in climates not too severe.


consumption comparison chart of the types of heating

the end is trimmed (extraneous data such as factor taxes on electricity), but has interesting results.



Here OpenOffice spreadsheet (version 3) ( add here the link for the mule ), if you want to play with some numbers, or just get to see this table piece.

[I add the 27/IV/2010 version, with fares (gone, for example, excessive consumption in power) for the mule: OpenOffice spreadsheet ( link if you do not have eMule or similar ) and exportanción PDF file (ditto ). ]


Comment
results
The results speak for themselves, but having seen the table that I commented in 2003, must be said that heating oil (if you discount hiciesen 15%) is amazingly expensive (about all compared to natural gas) ... I have a errorcillo or somewhere that I have not found.

Something that really surprised me the comparison is quite normal boiler versus diesel electric radiators TDH. The little difference, even though he had discounted oil, certainly diluted the effect of homogeneous distribution of said power consumption within 24 hours, although that would certainly raise the contracted power.

In any case, the heat pump, including pessimistic version, and considering normal electricity tariff is almost on par with natural gas boiler condensing, or better than this and almost boiler TDH considering pellet. Yes, simply consider tierra-ó-agua/agua heat pump or heat pump air / air soft enough weather location (a few nights around freezing point), then we have the heat winner, even without TDH. Conclusion




If today we want an economic heating consumption or we opt for a biomass if we have the space and the availability of quality fuel at a good price or install a version of low-temperature diesel or natural gas condensate (underfloor heating or oversized radiators), supported by solar panels, or acquire the heat pump suited to our climate.

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efficient environmental heat, heat Heat green green

Certainly there are times when advertising and brand names rub the insult to the intelligence of our species, since it seems to be no illegality. Thus, direct electrical heating systems (radiators / emitters electric heat with or without color) come into play to add the falsity of low and / or any term that directly start with eco to make you believe uninformed consumer will not only save money, but also enhance the planet in general.

Well, perhaps the only place you might consider the direct electrical heating an ecological system would be in France, where over 80% of electricity is nuclear, and therefore use generates little amount of greenhouse gases. Yet it would be wasteful. That's why serious countries such as France, ( not, are not we ) try to promote the use of heat pump heating systems to achieve greater efficiency in resource use.

If we consider the case of Spain, we find that with a mix of electricity generation too focused on burning fossil fuels, using direct electrical heating is not only wasteful, it is anti-ecological, generate more greenhouse gases than if we burn fossil fuels directly in our house to keep warm.


What is the English mix?

You can consult the website of Red Electrica of Spain: https: / / demanda.ree.es / generacion_acumulada.html . Also, if you do them with the pointer over one of the lines between types, you put the numerical values. However, such data for today at 9:50 2/X/2008 are

• Hydraulics: 7.6%. Nuclear
• : 19'7%
• Fuel / Gas: 0.6%
• Coal: 17.5%
• Combined Cycle: 40.4%
• Wind: 3.7% Rest
• special regime: 12.7%

latter, special arrangements Rest, I guess that includes both solar energy cogeneration (ie, basically burning natural gas), but not broken do not go I will consider in the calculations.

being really optimistic, we can give an efficiency in electricity generation to 40% of Coal and Fuel / Gas and 60% that of combined cycle (natural gas). Therefore, and with a simple and inaccurate calculation, and neglecting the transmission losses and transformation of power from their point of origin to point of consumption, how many kWh of energy we must burn for us to reach our radiator 1 kWh / issuer direct electrical? (Yes, with how easy it is, conversion to electricity will heat impressively close to 100%, but do not rule out emission of electromagnetic waves paltry 50 Hz): Coal

• and Fuel / Gas : 1 / (40% kWh-eléctrico/kWh- burned ) = 1 / 0 '4 burned kWh / kWh = 2.5 kWh electrical burn / kWh-electric combined cycle
• : 1 / (60% kWh-eléctrico/kWh- burned ) = 1 / 0 '6 kWh burned / kWh-electric kWh = 1'66 burned / kWh-electric

Given the percentages in the generation we have: (17.5% +0.6%) x 2.5 + 40.4% x 1'66 + 42'04% x 0 = 1'1258 burned kWh / kWh-electric, that is, although considered a 42'04% generation of electricity from clean energy (big if given the mixture in Other special arrangements ) , yet is that we burn 12% more resources than we did the combustion directly into our house to warm and aprovechasemos all its heat. Certainly the heat using a boiler system and radiators water circuit, will not be used whole, ie, some is going in the gases resulting from burning or we are left in the boiler room. However, systems can be efficient as a natural gas boiler condensation working at low temperature and with good insulation, will surely have an efficiency of over 1 / 112 '58% = 88'82% kWh-calor-aprovechado/kWh - burned (rather be close to 95%), making it more environmentally friendly, for now, even with these optimistic assumptions for direct electric heating.


ecological heating

Obviously we consider the less we have to ecological burning, either in the corresponding power generation or in the boiler in our house.

Therefore, we have two one main technologies available today that allow us to increase very significantly kWh of heat obtained from burning 1 kWh- :

1. low temperature heating with solar support.
2. heat pump.

However, both solutions are not disjoint, but is seen as economically (ecologically possibly yes) implement cost-effective together.


Support solar

Assuming that we already have a heating system at low temperatures as can be, for example, condensing boiler over underfloor heating (the water will flow safely to 40 º C or less), the coupling to the circuit a solar thermal panels will reduce the heat to be produced by the boiler, running it just to support solar panels when they are not heating enough water (lots of clouds or at night).

Solutions with 50% heat input from the solar panels are not crazy, and allow, repairing the previous accounts assuming good 88'82% efficiency boiler system, 50% x = 0'5629 112'58% burned kWh / kWh-heat-exploited.

Certainly this type of facility is to be undertaken by the community for a building or houses.



heat pump heat
Making something cold to breathe somewhat counterintuitive hotter ... except that today we all have a fridge at home, and perhaps many air conditioning. Both the bar and in the air conditioning we are interested in the generation of cold, heat being the byproduct of which we have to fight either in the back of the refrigerator, well the compressor on the outside of air conditioning in this heat pump, heat, not the product but the purpose of the system, while the cold will be the byproduct.

heat pumps can be designed to get the heat from various media:

1. outside air,
2. floor, install it in depth with several wells, either extension tubes to shallow horizontal groundwater
3. .

By far the most popular in mild climates is the outside air, while more severe weather will be more efficient either past. The disadvantage of the outside air is precisely the variability of temperature (and humidity) and the lower efficiency of the heat pump higher temperature jump between the interior and exterior, while the other two operating under high temperature almost constant source of origin, but with the disadvantage installation of a much higher cost.

Also, the heat distribution can be done basically in two ways:

• directly into the air, along with the typical console air conditioning, along with the indoor unit from ceiling and duct distribution to various rooms,
• heating water circuit of low temperature, either by console or by underfloor heating, or both, extradimension well with radiators.

is in this last variant which could even be attached to the hot water system solar panels. Moreover, we can find a hybrid integrated heat pump more in so-called solar panels solar thermodynamic . Except the latter, the solution is potentially ambiguous, serving for heating in winter and cooling in summer.

efficiency heat pumps water source or ground source, can be placed to be pessimistic 3.5 kWh-heat for every kWh electricity consumed , while a heat pump air / air (air conditioning reversible ) Inverter DC could, being too pessimistic, leave it at 2.5 kWh per kWh-heat-electric. So, back to our eco-efficiency calculation, we would have for each of this pair of cases (certainly it is optimistic that the 1'1258):

-electric
• 1 kWh / (3.5 kWh-heat) x 1'1258 burned kWh / kWh-electric kWh = 0'3217 burned / kW-heat.
• 1 kWh / electric / (2.5 kWh-heat) x 1'1258 burned kWh / kWh-electric kWh = 0'4503 burned / kW-heat.

by these results is that serious in countries like Japan, not only advocate use of heat pumps for heating but increasingly efficient models (6 kWh-heat for 1 kWh electricity consumed here than in Europe or are), having already achieved reduce power consumption in both heating and air conditioning in recent years . Conclusion




heating What is organic? I think it is obvious that none of the heaters to bunting.

What is the most economical heating? This question will have to remain for another day, but I think I can go and making a clear idea of \u200b\u200bwhat the candidates (no, not any bright colors.) Certainly

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heating systems are the most varied, and this at least gets out of the ordinary. I do not mean the real power system based on ecological heat pump (heatpump) , but the reinvention of the infrared plates.

In other electric heating systems by radiation, such as halogen electric heater, are nothing new. The use of such systems is also imperative when it comes to keeping warm on the outside users, such as in a terrace, certainly here have not seen it anywhere, but in the area San Francisco for more than a decade. The proposed Green Heat yes, it seems that apart from the rest available in the market for its format plates for ceiling suspension, accompanied by a wall thermostat.

What advantages and utilities can have this heating system?:

1. being heated by radiation to 80% plus its location on the roof, get create a nice chill to it quickly without having to heat the air. This can be an interesting option for meeting rooms and restrooms.
2. In a traditional setting, for example in a classroom, Because radiation will receive on the whole floor, sofas and other furniture (also something the walls), will ensure that heat is distributed from top to bottom, similarly, I suppose, the most comfortable heat distribution system, underfloor heating .
3. In a traditional setting, as the walls outside the home should not receive more than a minor part of the infrared radiation should be achieved is that the heat given us more time (and tell a personal anecdote on another day) than with other systems, such an issuer may be hung on the wall (but not an electric heater oil in place central medium of the room).
4. guess in a bedroom, lying down, get a considerable direct radiation that makes it very pleasant stay with little power.

certainly not everything will be so nice. What are the disadvantages?:

1. If the purpose is to heat the entire house at a given temperature, we have exactly the same efficiency as any other direct electrical heating system, and, except for the consideration of heat loss and walls mentioned above, the same consumption.
2. If the goal is not to heat the entire house, but only a limited set of rooms, then welfare is simply less or have to go off and plates as we move through the house (it is not unreasonable, I do not know how much favor colds).
   
3. While advertising is ambiguous ( "Saving between 30 and 50% of energy consumption of any current system " ) is more than clear that they are being compared with other direct electrical heating ie, do not expect that the system as a constant temperature to heat a whole house, eat less than an efficient boiler system (or not) of low-temperature gas or diesel, or a heat pump system.
4. The placement ceiling, given the implicit use of electrical lighting, it seems a bit risky, unless you consult a professional electrician and updated sections of the cables which go beyond putting plaques that require considerable power. The sockets are usually generous sections at ground level only.

So is Green Heat heating system recommended for anyone in any weather? Is the electric heating market greener? The answers to both questions are to be no.

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"scam TECC" Goodbye Energia

Not that I'm very comfortable with the title, but would not surprise me More than one came on a day to correct information on the deceased Energia forum through a search of that pair of words. Since I have already put, and I will not remove them until I Obigo, is unacceptable to clarify the meaning.

start with the background.


The colorful heat

The first highly publicized system Radiator / convector heaters with thermostat programmer more inclusive, to my knowledge, was blue heat. From here have come from under stones and more radiator / convector heaters with a couple of common characteristics:

1. The price is far greater than an electric heater oil same kW.
2. not consume less than the oil cooler as above.

"are strongly discouraged this type of radiators / convectors? Well not really, as long as we go to models priced tight enough because it does have its advantages (compared to electric oil):

1. can usually be hung on the wall, which does not roam in medium. Having
2. programmer and thermostat do not have to put them (60 € more shooting eye to expensive) oil cooler, which results in a more compact configuration.
3. Furthermore, if any, are reported with a power regulator (perhaps through an exchange that facilitates the programming), we can employ to ensure that less power will be disconnected in case anyone from the refrigerator or turn on the kitchen , and therefore will not jump the limiter. Otherwise, we will need more power contracted or give up more times to the governor.
   

How do you justify a price totally unbalanced with respect to benefits provided?:

1. Some brands, with advertising clearly misleading terms such as Low Power .
2. Most other advertising clearly ambiguous, usually poking through the middle word Savings.

Well, I will discuss these last two points:

1. All direct electrical heating systems (including all of bunting), ie, which use electricity to generate heat (Joule ) will consume 1 kWh of electricity for every 1 kWh of heat delivered. Simply convert any type of energy to heat is as simple and easy it is, indeed, when the conversion is of a type (not heat) to another (not hot), we will always lose some in the residual heat is say, we will not ever efficiency of 100%, and internal combustion engines have an efficiency around 20% (going from memory) the gas and around 40% that of diesel, the power plants burning coal by less than 35% (may get a more modern design) and the burning of natural gas (combined cycle) below 60%. The only marketed electric heating does not follow this rule is that based on Carnot cycle, ie, heat pumps, as not generate heat, but it pumped from a colder source (outside air, land or groundwater) to a focus hotter (indoor air, water underfloor heating), whereupon efficiencies typical 4 kWh of heat for every 1 kWh of electricity consumed in nominal conditions are far fetched, but today more than normal. A heat pumps, again.
   
2. Certainly if we have an oil cooler without programmer or thermostat, it will be easier than what we have on more than necessary, consuming more electricity (and heating) than the corresponding radiator / heater, programmable thermostat, yes , if you buy an external thermostat and an external programmer (there will certainly be the two in one) and plugged the oil cooler on both, because then also get exactly the same savings. A shame, but there were those who took the time to do exactly that experiment comparing the two systems at home, and published exactly the same result as I comment in the forum late Energia.

TECC

Well, this is not just another company more dedicated to the manufacture and sale of radiators / convectors.

What is special about it compared to others? Well it seems that, in addition to prices of chills, a sea of \u200b\u200baggressive trade with promises you warm this apartment of 90 m2 with 70 € a month (not the city seem to matter), without the slightest basis to the endorsement, followed by " if you sign now we do 45% discount (will eye) we do to the promoters " . And therein lies the difference, because what is a signature loan with a financial institution and the people, the last time I read about it in the late Energia forum was having real problems with transactions void. Well, if you have a more direct evidence, take a look at the blog of Patricia and Calatayud forum. Today, 8/X/2008, I add two links: radiadorestecc.blogspot.com Emagister and

Is this scam? Well, apparently, some people do not have it clear.

Patton Poh2501 Heater Repair

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Well, it's been at least a couple of months since the page http://www.energuia.com ceased to be active, including the most important from the point of view the amount of useful information, their forum. Yes, if picáis on the link now, and even goes as far as me, I will be playing to see the first image. If, however, you arrive on time, search google by Energia and see also a very clarifying information about ... Call me a bad idea, and special ro wrong, but page unavailable did not appear until they ceased to be available in the google search (I have not tested other browsers) none of the pages of the forum " Energia ", not even the option Cached easy to check by simply searching for the next two words" scam TECC (formerly was the primeritas). Well, while again not be accessible if it is one day, I hope to entering information in this blog , including at least the most important points that were only accessible in that wonderful (Or by the tool or for the lack of censorship) forum. This blog

is dedicated to skeptical , liming , Alfaquino , Deivis and Pepe (some, I will have failed the memory, and I will have misspelled, the one that I to warn about this blog going to be a liming).