thermodynamic heating

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hi there
i have recently read something about thermodynamic heating which is the new kind of solar powered panel that works even if there is no sunshine. it can heat up a water cyclinder day and night and even wind and rain. supposedly.
does anyone know anything about it.
or is it some kind of nonsense.
if this system really is available, does it spell the end of the gas boiler.
 
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All heating is thermodynamic!

The proponents of this system have just used the word to make it sound something extra special. A bit like the "digital aerials" you see advertised and on sale. All aerials are digital.
 
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Thermodynamics is the branch of natural science concerned with heat and its relation to other forms of energy and work. It defines macroscopic variables (such as temperature, internal energy, entropy, and pressure) that describe average properties of material bodies and radiation, and explains how they are related and by what laws they change with time. Thermodynamics does not describe the microscopic constituents of matter, and its laws can be derived from statistical mechanics.
Thermodynamics can be applied to a wide variety of topics in science and engineering, such as engines, phase transitions, chemical reactions, transport phenomena, and even black holes. The results of thermodynamics are essential for other fields of physics and for chemistry, chemical engineering, aerospace engineering, mechanical engineering, cell biology, biomedical engineering, materials science, and are useful for other fields such as economics.[1][2]
Much of the empirical content of thermodynamics is contained in its four laws. The first law asserts the existence of a quantity called the internal energy of a system, which is distinguishable from the kinetic energy of bulk movement of the system and from its potential energy with respect to its surroundings. The first law distinguishes transfers of energy between closed systems as heat and as work.[3][4][5] The second law concerns a quantity called entropy, that expresses limitations, arising from what is known as irreversibility, on the amount of thermodynamic work that can be delivered to an external system by a thermodynamic process.[6]
Historically, thermodynamics developed out of a desire to increase the efficiency of early steam engines, particularly through the work of French physicist Nicolas Léonard Sadi Carnot (1824) who believed that the efficiency of heat engines was the key that could help France win the Napoleonic Wars.[7] Irish-born British physicist Lord Kelvin was the first to formulate a concise definition of thermodynamics in 1854:[8]
Thermo-dynamics is the subject of the relation of heat to forces acting between contiguous parts of bodies, and the relation of heat to electrical agency.
Initially, the thermodynamics of heat engines concerned mainly the thermal properties of their 'working materials', such as steam. This concern was then linked to the study of energy transfers in chemical processes, for example to the investigation, published in 1840, of the heats of chemical reactions[9] by Germain Hess, which was not originally explicitly concerned with the relation between energy exchanges by heat and work. Chemical thermodynamics studies the role of entropy in chemical reactions.[10][11][12][13][14][15][16][17][18] Also, statistical thermodynamics, or statistical mechanics, gave explanations of macroscopic thermodynamics by statistical predictions of the collective motion of particles based on the mechanics of their microscopic behavior.
 
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Im a plumber not a physicist, obviously a cut and paste. Its a forum for information and that is information on thermodynamics in a thread for thermodynamics. People that read will be able to use the parts that they want and disregard the parts they dont want. It makes an interesting read thats all.

cheers
 
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The systems being touted are air source heat pumps. Nasty ones at that.

http://www.diynot.com/forums/viewtopic.php?t=224641

Slightly more cost effective to run than an immersion heater; significantly more expensive to buy; dubious life expectancy; dubious firms promoting them.

Fit a gas boiler. Add solar-thermal if you want it cheaper still. If you're off-grid then do solar thermal with an air-water heat pump, but a pukka setup rather than this thing.
 
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Hi all

I have one of these systems installed in my house.

I live in Scotland and the average temperature has been 1 - 2 degrees for some months now but my System has averaged 54 degrees every day, suprisingly the system works best when the temperature is below freezing or it is raining.

The fact that most suppliers call it a SOLAR/Thermodynamic system leads to a lot of confusion, yes it utilises some solar power but works better when the sun is not shining on it so it is ideal for use on a north facing wall (they are not pretty but when you can get hot water at 54 degrees supplied for 1 -2p per day who am I to moan)

If anyone thinks I am a supplier or installer then then are definitely wrong I am a person that is seeing a new technology being slated because of people that do not understand it. (and that includes me, I don't understand it and don't care, but I do know it works)

Scotsplum
 
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Hi all

I have one of these systems installed in my house.

I live in Scotland and the average temperature has been 1 - 2 degrees for some months now but my System has averaged 54 degrees every day, suprisingly the system works best when the temperature is below freezing or it is raining.

The fact that most suppliers call it a SOLAR/Thermodynamic system leads to a lot of confusion, yes it utilises some solar power but works better when the sun is not shining on it so it is ideal for use on a north facing wall (they are not pretty but when you can get hot water at 54 degrees supplied for 1 -2p per day who am I to moan)

If anyone thinks I am a supplier or installer then then are definitely wrong I am a person that is seeing a new technology being slated because of people that do not understand it. (and that includes me, I don't understand it and don't care, but I do know it works)

Scotsplum

Glad there are good reports from someone USING ONE! A guy I know is so anal about this system installed on his property he has an electric meter just before the heat pump!
I can't see why solar gain would not increase efficiency like it does with a heat pump during summer??
A great deal depends of the "boiling point" of the charge gas used in the unit, giving it the ability to remove and transfer heat!
 

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