Artificial Heat Illusions

Excess heat, at a certain temperature level, can be (and is) used to boil water and make a steam generator to produce electricity.

Low grade heat energy cannot be harvested economically using current technology. While the energy is free, collecting it for use is very expensive at present.

bioramani

Waste heat recovery is economic in some circumstances. An example of this is the condensing domestic central heating boiler. Another one is the "heat wheel" used in many air handling systems.

Utilising low-grade heat is only limited by one's imagination, subject to its obeying the Laws of Thermodynamics.

IS not it is true the global warning is connected to heat loss caused by CFC breaking down the ozone layer above the earth. Which allowed excessive IR and other energy to warm earth more than normal.

This can happen with green house gas also along with exhaust of cars and trucks. As long as we are using God given resources non efficiently we will pollute atmosphere and will have global warming.

We need clean energy bring emission down to control able level and will help our grand kids to enjoy this planet.

When I lived in Florida (20 years ago), I had a new HVAC system installed in my house that used a heat-pump for both heating and cooling. I also had a heat recovery unit installed that took the waste heat and pumped it into my hot water heater. In the summer (well, April to November actually) I was running AC and getting 'free' hot water. Even in the winter some of the heat generated when the heat-pump was running in its heat cycle went to the hot water heater. So year-round my expense for hot water was practically nil.

So what you are asking is certainly not a new idea and does not require new technology, but it does involve some public awareness. A tax break for homeowners who install this would be a great way to promote it.

In Florida the atmosphere was the heat sink that allowed this system to work. In other parts of the US -- and many other parts of the world -- a geothermal heat sink would be needed in order to use a heat-pump for home HVAC, which might not be possible.

You started almost correct. Your remarks are OK

The last paragraph is confusing the Heat sink: Heat pump = any compressor in HVAC works as a heat pump whichever way: When cooling the room, the heat sink is the outside air and when heating the room (winter), the heat sink becomes the room...

I was using the term 'heat sink' in the most general way -- as a source to draw energy from or dump energy to. When I took thermodynamics in college we used the term 'heat sink' to mean the large 'tank' from which you could draw heat, or into which you could store heat.