Potential Capacity Research On Application Of Water-loop (Tank) Heat Pump System In Catering Buildings

Among all public buildings, energy consumption within catering buildings are veryspecial, and their energy consumption are generally very high. The problem of buildingenergy consumption has been paid more and more attention nowadays by thegovernment and the society, so high energy consumption of catering buildings hasbecome a realistic problem that must be solved.In catering buildings, there are variety of thermal end users, such as food cooking,hot water users, air conditioning (both heating and cooling) end users, etc.. To supplythese thermal consumptions, certain amount of water and air accompanying with certainamount of heat load and cooling load is spent. Great amount of primary energy (orelectricity) is consumed to generate corresponding amount of heat and cooling load toheat or cool the water or air which serves as the thermal media. Most of these operationsare taken in separate line flow with the obtaining of heating and cooling products fromprimary energy source. After the thermal energy consumption of each end user, largeamount of remaining low temperature thermal energy is discharged directly outside,such as hot flue gas, warm sewage water, condenser heat, etc. These kinds of utilizationsare manipulated in unreasonable way and cause much thermal energy wasted. Toincrease the utilizing efficiency of building energy, and decrease the total amount ofbuilding energy consumption, independent separate thermal systems should beintegrated. With the system integration, coupling utilization of thermal energy will bepossible, primary energy input the building will be utilized at the greatest extent and begreatly reduced. To incept this perspective, water-loop (tank) heat pump system isnecessary and the most important content is the allocation of the thermal storage tank(served as the water-loop).In this paper, a typical catering building model has been established, buildingthermal services and systems are enumerated in detail. The amount and state of thermalenergy utilization within each service system is analyzed. A specific integrated modelthermal system is suggested. The whole research work is mainly based on simulation,such as building thermal load simulation (DesignBuilder software), characteristicsimulation of the water-loop heat pump system (TRNSYS software), optimaldimensions and thermal characteristic simulation of the thermal storage tank, etc. Based on the analytical (including simulation of building thermal load, simulation ofsystematic energy consumption, performance analysis of the system, economicalanalysis and exergy analysis) results, the advantages and superiorities of the modelsystem (water-loop heat pump system with the thermal storage tank) are adequatelyexpounded, and the potential capacity of the application of the model system in cateringbuildings has also been well demonstrated.