IMPROVEMENT OF THE THERMODYNAMIC CYCLE OF SINGLE-STAGE STEAM COMPRESSOR REFRIGERATORS
DOI:
https://doi.org/10.15421/jchemtech.v32i3.313076Keywords:
throttling, compression work, volumetric and energy losses of the compressor, cooling coefficient, thermal pollution of the atmosphereAbstract
The most common device used by mankind are refrigerators. Their number on the planet Earth is significantly inferior to the number of gadgets, but significantly exceeds the number of no less common cars, the main device of which, most often, are internal combustion engines. They, producing mechanical/electrical energy, pollute the Earth's atmosphere with carcinogenic gases and heat, and refrigeration plants, using this energy, pollute the atmosphere with heat. The efficiency of both the direct (energy) cycle and the reverse (refrigeration) cycle depends on the thermodynamic cycle on which they are built. Therefore, several improvements to the thermodynamic cycle of single-stage refrigerating machines are proposed: from the simplest to the most complex, respectively, from less to more efficient. The performed comparative calculations showed that the excess of the main efficiency indicators of the refrigeration cycle with limited regenerative heat exchange over the indicators of the simplest basic cycle (without surface supercooling of the liquefied refrigerant and superheating of saturated steam) do not exceed 6 %. Exceeding similar indicators of the cycle with maximum (limit) regenerative isobaric steam overheating and polytropic process of its compression over the indicators of the cycle with limited regenerative heat exchange reach tens of percent. At the same time, exceeding the indicators of a similar cycle, but with isochoric regenerative steam overheating, reach 100 %.
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