| Two big problem of human society in our country is still the primary energy use and environment deteriorating,the state advocates the use of geothermal energy and encourage the use of trough power reached peak "move" of the role,under the policy of soil source heat pump and ice storage air conditioning technology coupled system should be formed,not only greatly alleviate the national electric power peak load,but also reduce the use of primary energy in China has played a vital role.This article demonstrates the soil source heat pump system with ice storage air conditioning technology,the necessity of the coupling,and chose a certain office building in Shanghai as the research object,the soil source heat pump and ice storage air conditioning technology coupling system design in detail,and analyzes the energy-saving benefit and economic behavior of coupled systems.This paper using Energy Plus the simulation software for all-year hourly building cooling and heat load simulation,and calculate the cold and hot load,years here in cold and hot load,summer typical air conditioning design,100%,75%,50%,25%,four different cases of cooling load;According to the four different cases of design cooling load,expounds the control strategy of the coupling system in detail,and introduces the working process of the coupling system and the system configuration.and then to the ice storage device and heat pump units selection,the coupling system has carried on the detailed design and numerical simulation using Matlab software to simulate the coupling system runs 15 years after the changes of soil temperatureThe underground soil heat balance part coupling system is calculated and analyzed in detail,the excess heat is used for preparation of domestic hot water,heat balance calculation rate was 7.63%,and the simulation software to simulate the temperature change of inlet hole wall temperature,heat pump coupling system after 15 years of operation by using Matlab numerical,hole wall temperature,heat pump the heat pump operation 15 years underground drilling import and export temperature have improved,but even in summer the most adverse circumstances,the water temperature of the heat pump still does not exceed 29 degrees,so the heat pump can meet in 15 years and always maintain efficient operation;Finally analyzed the coupling system of energy-saving benefit,and calculate the coupling systems in initial investment and operation cost,using life cycle cost and initial investment payback period two methods of economic evaluation,respectively with that of the pure soil source heat pump system,ice storage air conditioning technology compared with city heat supply network system,it is concluded that the soil source heat pump and ice storage air conditioning technology coupling system has a good economic advantage. |
