| The consumption of non-renewable energy continues to rise,the ecological environment is becoming more and more severe,and the awareness of developing and using renewable energy is gradually increasing.The way to alleviate energy shortages is to increase the use of renewable energy.Winter heating adopts a solar-ground source heat pump composite heating system to reduce the use of non-renewable energy and improve the environmental pollution during the winter heating period.Adopted De ST to build the experimental office building model,and obtained the dynamic heat load change law of the whole year.Based on heat load,built a solar ground source heat pump composite heating system.Analyzed and experimentally tested solar thermal collectors,calculated and designed the thermal resistance of the ground source heat pump system.Compared the energy efficiency of different cooling ends.The system used a PLC control platform to conduct experimental research on different heating operation modes according to the outlet temperature of the collector.The temperature difference between the inlet and outlet of the end of the capillary network is greater than the temperature difference of the end of the fan coil,and the end of the thin tube network is more energy-efficient.Direct solar heating throughout the day can't meet the heating needs.Solar heat pump for heating.The system COP is 3.98.Ground source heat pump for heating.The system COP is 3.34.A compound heat pump system for heating.The system is COP 4.21.When the temperature of the heater is 15 ?,the efficiency of changing the heating mode is the best.Experimented in different months of the heating season.The combination of direct solar heating and solar heat pump heating in the early and late heating stages,solar guarantee rate is above 80%.In the middle period of heating,compound three heating methods,the solar guarantee rate is above 60%.The COP of the entire heating cycle is above 4.Figure 49;Table 13;Reference 60... |
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