Research On The Performance Of Compression Heat Pump System With Solar Energy

With the rapid development of C hina’s economy, long-term use of coal and other fossil fuels has caused environmental pollution and energy shortages restricting C hina’s economic development. Solar energy and heat pump technology are currently one of the main contents of utilization of solar energy.Parallel tandem solar compression heat pump using three kinds of refrigerant R134 a, R1234 yf, CO2’s performance analysis program was developed based on VB language. The solar radiation intensity, the evaporation temperature, condensation pressure, compressor discharge pressure, the throttle pressure’s effect on the system performance was analyzed; Exergy loss model of solar thermal compression heat pump with various components are established. Via the Fluent software, compression heat pump system’s thermal storage tank temperature field simulation was studied.Research shows that the parallel system thermal storage tank’s temperature continues to rise from 8:00 to 13:00, the water temperature is maintained at about 60 ℃. Parallel system’s COP is less than the tandem system’s COP; tandem systems’ exergy loss is greater than the parallel system. For R134 a tandem and parallel systems, solar collectors and compressors are the largest component of exergy loss; for CO2 tandem and parallel systems, the condenser and compressor are the largest component of exergy loss. With the smaller inlet temperature velocity, the more obvious of the temperature stratification, heating system efficiency is also a corresponding increase in the flow rate of 1m/s. With inlet hot and cold water increasing, thermal storage tank temperature field did not change significantly. The results provide a theoretical basis for the development of highly efficient solar compression heat pump system.