Operation Analysis of a Compound Air Conditioning System using Measurement and Simulation

It has a great impact on the energy saving of buildings when the system scheme combining the underground pipe with the floor radiant cooling. In this study, the model was established and optimized using TRNSYS under different conditions. The results were analysed, so as to find the threshold value of energy consumption and indoor comfort of control system. Throughout the entire cooling season, the water temperature of buried pipe is between 18-20 degrees C, the return water temperature is between 18-21 degrees C. The peak of the water return temperature of the buried pipe usually occurs 20: 00 in the evening, and the valley value appears at 9: 00 in the morning, with the same rule of 24 hours. The peak of the water supply temperature is around 18: 00 in the evening, and the valley value is at 8: 00 in the morning. The contrast can be seen that buried pipe for the return water temperature, indoor temperature simulation value and actual value are basically identical. The reliability of the simulation model is verified by comparing the simulation data with the monitoring data. It provides technical guarantee for the future analysis of different operation strategies directly using TRNSYS software. (c) 2017 The Authors. Published by Elsevier Ltd.