Space Heating Load Estimation Procedure for CHP Systems sizing

33rd UIT (Italian Union of Thermo-fluid dynamics) Heat Transfer Conference

物理学;力学

Vocale, P.^1 ; Pagliarini, G.^1 ; Rainieri, S.^1

Department of Industrial Engineering, University of Parma, Parco Area delle Scienze 181/A, Parma

43124, Italy^1

关键词: Climate variables;    Combined heat and power;    Different operating conditions;    Dry bulb temperature;    Energy performance;    Heating and cooling loads;    Loads estimations;    Trnsys simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/655/1/012008/pdf
DOI  :  10.1088/1742-6596/655/1/012008

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Due to its environmental and energy benefits, the Combined Heat and Power (CHP) represents certainly an important measure to improve energy efficiency of buildings. Since the energy performance of the CHP systems strongly depends on the fraction of the useful cogenerated heat (i.e. the cogenerated heat that is actually used to meet building thermal demand), in building applications of CHP, it is necessary to know the space heating and cooling loads profile to optimise the system efficiency. When the heating load profile is unknown or difficult to calculate with a sufficient accuracy, as may occur for existing buildings, it can be estimated from the cumulated energy uses by adopting the loads estimation procedure (h-LEP). With the aim to evaluate the useful fraction of the cogenerated heat for different operating conditions in terms of buildings characteristics, weather data and system capacity, the h-LEP is here implemented with a single climate variable: the hourly average dry- bulb temperature. The proposed procedure have been validated resorting to the TRNSYS simulation tool. The results, obtained by considering a building for hospital use, reveal that the useful fraction of the cogenerated heat can be estimated with an average accuracy of ± 3%, within the range of operative conditions considered in the present study.