Carbon dioxide as a working fluid for refrigeration and heat pump systems is increasingly importance in view of both ecological and economical aspects. The present investigation includes the theoretical work followed by numerical work for UA inventory. A simulation model has been developed to evaluate the system performance parameters for a transcritical carbon dioxide cycle for simultaneous heating and cooling. The simulated results are found to be in reasonable agreement with reported experime
Carbon dioxide as a working fluid for refrigeration and heat pump systems is increasingly importance in view of both ecological and economical aspects. The present investigation includes the theoretical work followed by numerical work for UA inventory. A simulation model has been developed to evaluate the system performance parameters for a transcritical carbon dioxide cycle for simultaneous heating and cooling. The simulated results are found to be in reasonable agreement with reported experimental results. This paper presents the simulation results of a transcritical CO2 Heat Pump system for dairy applications where simultaneously cooling at 4 ˚C and heating at 73 ˚C are required. The optimal COP was found to be a function of the compressor speed, the evaporator water-inlet temperature and the gas cooler water-inlet temperature and discharge pressure. A study for optimally allocating the fixed total heat exchanger inventory between the evaporator and the gas cooler has been carried out. The COP of the system reached a maximum value and then decreased as the evaporator UA-value was monotonically increased and indicates optimum UA inventory between evaporator and gas cooler for different working condition and component specifications. These studies offer useful guidelines for an optimal system design.
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By shecco , published Nov 04, 2016 - 0 pages
By shecco , published Nov 04, 2016 - 0 pages