화학공학소재연구정보센터
Energy, Vol.180, 1-9, 2019
Investigation on transient energy consumption of cold storages: Modeling and a case study
It is believed that large cold storages account for approximately 80% of overall cold storage volumes in China. Refrigeration energy demand of the buildings represents over 60% of energy consumption and thus users have considerable incentive for decarbonization by optimizing the refrigeration energy supply. This fact makes transient predictions of energy consumption and thermal modeling of the buildings become important. In this study, transient energy consumption of cold storages is mainly analyzed. A simplified 3R2C heat transfer model is used to simulate the cooling energy dissipate from building envelop. A semi-empirical equation is applied to simulate infiltration cooling load. The physical model of the internal mass is represented and calibrated by data-driven modeling approach with detailed transient simulation of the other two parts and measurement data. The overall model is validated by the measurement input power of a large cold storage as a case study. The modeling process show that the variety of cooling load of the internal mass is linear dependent on the variety of room temperature. The simulated results of the overall model have a good agreement with the measurement input power (RN_RMSE = 4.95%, R-2 = 0.92, CVRMSE = 5.27% and MBE = 0.48%). (C) 2019 Elsevier Ltd. All rights reserved.