Simulation of a large central cooling and heating plant using TRNSYS and calibration with monitored data

This paper presents the development of a model, using TRNSYS, of a large central cooling and heating plant. The model includes the chillers, cooling towers and pumps of the chilled water loop, and the heat recovery system from the chillers. The model is calibrated with monitored data of June 23rd to June 29th, 2008, and then tested with data over the summer season, from June 23 to September 21, 2008. The simulated water temperature at several key locations in the system and the electric input to the equipment such as chillers, cooling towers and circulating pumps are compared with the measured values. The simulated Coefficient of Performance (COP) of the chillers and the overall central cooling plant are compared with the measured values.