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Carbon Dioxide Refrigeration Cycle of Transcritical to the Analysis and Study of Micro-Chanel Gas Cooler

Author: ZhangZhiHui
Tutor: YangLi
School: Hebei University of Technology
Course: Thermal Power Engineering
Keywords: The carbon dioxide Transcritical loop Refrigeration Microchannel
CLC: TB611
Type: Master's thesis
Year: 2007
Downloads: 214
Quote: 1
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Abstract


CFCs alternative primary reason is because they destroy the ozone layer , without damaging the ozone layer HFC class working fluid , the working fluid to replace CFCs . While HFCs do not destroy the ozone layer, but they are chemically stable and able to accumulate after the release , which eventually led to the the obvious greenhouse effect, phasing out the consumption of ozone-depleting substances and greenhouse substances to reconsider natural refrigerants refrigeration has become an international responsibility . Transcritical CO2 cycle theory proposed up to now , only 10 years , but it has always been the focus of domestic and foreign natural refrigerants and hot spots . Many theoretical and experimental studies have shown broad prospects transcritical CO2 refrigeration cycle , but also there are some problems to be solved . In this paper, the performance of the CO2 transcritical cycle for the study, and carbon dioxide gas cooler numerical calculation and simulation . First, from environmental protection and sustainable development on the return to nature , necessary to protect the environment , the environmental impact of the application of the refrigerant can not be ignored , should re-enable the carbon dioxide out of the protection of the living environment of mankind , as a new type of refrigerant . New refrigeration and heat pump loop device based on the application of the study of the natural refrigerant CO2 , analysis of the carbon dioxide transcritical cycle air conditioning system , including the impact on the system performance of the evaporator outlet temperature , gas cooler outlet temperature of the system performance the impact of the high-pressure side of the maximum pressure on the system performance , and the two-stage compression refrigeration cycle performance optimization of gas cooler design, verify the correctness of the model to provide a theoretical basis for CO2 transcritical cycle air conditioning . Strive to improve the cycle coefficient of performance of the CO2 refrigeration cycle , enhance the competitiveness of the CO2 transcritical cycle , and to promote the practical application of the carbon dioxide refrigerant to replace the various ring harm the working fluid from the fundamental solution to the destruction of the ozone layer and the greenhouse effect . Finally, the main research content , purpose and meaning .

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CLC: > Industrial Technology > General industrial technology > Refrigeration Engineering > Refrigeration theory > Refrigeration thermodynamics, heat transfer , mass transfer , fluid mechanics
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