Simulation Research Of Hybrid Ground-source Heat Pump Based On The Dynamic Load

An comprehensive analysis of the demestic and foreign research and application ofthe Cooling Tower-Ground source hybrid heat pump in this dissertation. According tothe building of cold load is far greater than the heat load, points out the importance andfeasibility ofthe Cooling Tower-Ground Source heat pump in such building hybridapplication.For the building of a Cooling Tower-Ground source heat pump system inQingdao, taken TRNSYS software as the platform, set a model for CoolingTower-Ground source heat pump system of the simulation.Taken the building which uesed the Cooling Tower-Ground source hybrid heatpump system in Qingdao as an example, it calculates the annual dynamic load by usingthe software of TRNSYS first, gets annual cold load and heat load total amount,according to the difference of cooling tower assuming load, proposed several feasibilityscheme, and then used for Cooling Tower-Ground source hybrid heat pump system-theselection method, comparise of the calculated hourly load, for the system of eachscheme select the main equipments.Taken TRNSYS as the platform, different schemesof the Cooling Tower-Ground source heat pump system hybrid are simulated calculationyears of operation, compared the results that the building that the cooling load is greaterthan the heat load, for the Cooling Tower-Ground source hybrid heat pump system, ifthe cooling tower of the load for smaller or cooling tower of the bearing of the load toolarge, not energy saving, and increased the summer of the cooling tower operation cost;Through the calculation results, when the cooling tower for the cooling load of the totalamount of50%of the total load of summer, the cooling tower and the ratio of theground capacity plan is the most energy saving the economy. For different scheme,because the cooling tower design load is different, the quantity of heat of buried tubereleased to soil is different, this will affect the import and export of buried tubetemperature, the cooling tower for the load is greater,the buried tube water temperatureis lower，the operation of the system efficiency is higher. The initial investment andoperation cost have certain relationship with the number of buried tube and the capacityof the cooling tower, taken the cooling tower as auxiliary cold source, althoughincreased operating cost, but reduces the initial investment. The energy saving method of long simulation, through the analysis of the buried tube water temperature, get thecooling tower-soil source hybrid heat pump system, be helpful for buried tube soiltemperature field around recovery. Through the comprehensive analysis to see, in thefive schemes, the fourth is the best solution scheme.For the plan of the cooling tower capacity and the different proportion buried tube,taken the TRNSYS software to simulate, the optimal proportion plan. the simulation notonly save the human, material and financial resources, it also saves time, and can dolong time of simulation calculation. The results of study show that the hybrid heat pumpsolved the problem of cold and heat load partial.