Research on solar coupled air conditioning and hot water integrated system
In order to solve the problem of air conditioning in buildings without central heating in some northern cities,a new type of air conditioning and hot water system with solar coupled air source heat pump was proposed by combining solar energy with building air conditioning and hot water system.Based on the climate data of Lanzhou,the variable performance characteris-tics of heat pump coefficient of performance(COP)and energy consumption of the system were analyzed through the establish-ment and solution of thermodynamic model.The results show that the COP of the system is higher than 3.5 when the average so-lar irradiance is 374 W/m2,the condensation temperature is 55 ℃,and the ambient temperature is-10～0 ℃.In a housea of building area of 100 m2 with an annual air conditioning period of 220 days,compared with an ordinary heat pump system,the coupled air conditioning system with a solar guarantee rate of 30％can save 2.1 tons of standard coal and reduce carbon dioxide emissions by 5.56 tons a year.
Solar energyAir source heat pumpSystem energy efficiencyEnergy saving benefit
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