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Depth (m) 0 5 10 15 20 C° 5. Heat pumps 0 5 10 15 20 February May November August 1. Heat pumps are devices which transfer heat from one place to another. Heat pumps can carry heat from low temperature surroundings to a higher temperature building. Heat pump theory is based on the second law of thermodynamics, which says that heat passes from higher temperature body to lower temperature body. This means that if the heat transfer collector is kept at a lower temperature than its surroundings, it will absorb heat from the environment. An anti-clockwise cycle transports heat from a low temperature level to a high temperature level. A compression heat pump system operates based on the principle of the thermodynamic cycle. As a mechanical device, the heat pump can provide energy for space heating or cooling. The fundamental principle of the heat pump circuit is the dependence of the boiling temperature of a liquid on the pressure. As we know, in the anti-clockwise cycle heat absorption must occur at a lower temperature and heat emission at a higher temperature. To allow this, the pressure must be reduced so that the evaporation temperature is lower than the heat source temperature and then raised up to a level at which the boiling temperature is above the temperature of the surroundings (Eicker, 2014). Fig. 5.2. Earth’s surface temperature in moderate climate (Source: own elaboration) 5.2. Thermodynamic principles of the cyclic process 147PDF Image | Heat Pumps 978-83-65596-73-4
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
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