Conference Paper

Proceedings of ASim Conference 2012: 1st Asia conference of IBPSA-China, Japan, Korea

Potential capacity research on application of water-loop(tank) heat pump system in catering buildings

Weijie Zhang, Zou Minhua and Ma Yingying

Abstract: In catering buildings, there are variety of thermal end users, such as food cooking, hot water heating, air conditioning (both heating and cooling), etc.. To supply these thermal consumptions, certain amount of water and air accompanying with certain amount of heat load and cooling load is spent. Great amount of primary energy (or electricity) is consumed to generate corresponding amount of heat and cooling load to heat or cool the water or air which serves as the thermal media. Most of these operations are taken in separate line flow, with the obtaining of heating and cooling products from primary energy source, much of remaining low temperature thermal energy is discharged directly outside, such as hot flue gas, warm sewage water, condenser heat, etc. . These kinds of utilizations are manipulated in unreasonable way and cause much thermal energy wasted. To increase the utilizing efficiency of building energy, and decrease the total amount of building energy consumption, independent separate thermal systems should be integrated. With the system integration, coupling utilization of thermal energy will be possible, primary energy input the building will be utilized at the greatest extent. To incept this perspective, water-loop (tank) heat pump system is necessary 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 has been selected, building thermal services and systems are enumerated in detail. The amount and state of thermal energy utilization within each service system is analyzed. A specific integrated model thermal system is suggested. The whole research work is mainly based on simulation, such as building thermal load simulation (DesignBuilder software), characteristic simulation of the water-loop heat pump system (TRNSYS software), optimal dimensions and thermal characteristic simulation of the thermal storage tank, etc… The energy consumption characteristic analysis and the technical and economic analysis of the whole model system has been done, the optimal scheme of service allocation and optimal operation mode are also presented in this paper. Based on the analytical results, the advantages and superiorities of the model system are adequately demonstrated. *zhangweijie_5@sina.com
Pages: 259 - 266
Paper: