| ■ About heat pump |
Heat pump is a system which create heat energy by transferring heat, instead of creating energy from burning. For example, it is a system like air conditioner which utilize heat energy of gases by performing heat exchange as circulating the gases forcefully by expanding/evaporating and compressing/condensing.
It is called heat pump since the transfer of heat looks like pump drawing water, however, it is very effective and can save energy compared with system getting heat energy from burning fossil fuels such as oils, and it is largely expected to lower environment load since amount of CO2 emission is small.
| What is heat pump? |
| A system which create heat energy by transferring heat, instead of creating energy from burning. In addition to its high efficiency, environment load is low since amount of carbon dioxide CO2 emission is small. |
| ■ Basic principle of heat pump |
Boyle Charle’s law and the second law of thermodynamics is largely related to the heat pump.
Boyle’s low suggests that the product of pressure and volume is a constant for a given mass of gas under the constant temperature and Charle’s low defines that volume of a given mass of gas increases in proportion as absolute temperature increases under the constant pressure. These two lows are called Boyle Charle’s law by being combined together and it suggests “temperature of gas rise when pressure is increased and the temperature drops when pressure is decreased” in shot.
On the other hand, the second law of thermodynamics defines about heat transfer as “heat moves from hot stuffs to cold stuff and the other way is not possible”
| Boyle Charle’s law | Temperature of gas rise when pressure is increased and the temperature drops when pressure is decreased. |
| the second law of thermodynamics | heat moves from hot stuffs to cold stuff and the other way is not possible. |
| ■ Example of heat pump flow |
The following is a simple flow diagram about heat pump of air conditioner.
Air conditioner is a system with low temperature and it is difficult to build a heat pump system with extremely high temperature. For example, heat pump cannot be used in steam turbine because temperature of steam used in power plants which is turning generators is high since its pressure is very high, however, heat pump system can be used in KENKI DRYER whose steam pressure used as heat source is 0.7Mpa or less.
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