2008 Volume 33 Issue 137 Pages 29-38
The water thermal energy storage systems in the air-conditioning systems are installed in many buildings and their energy performance are greatly concerned. However, flow rates in the systems are unmeasured in some small systems because of expensive flow meters. Operation conditions of these systems can not be investigated, and appropriate operation conditions can not be achieved. The aim of this study is to investigate the operation conditions of the thermal energy storage systems. In this paper, a flow rate estimation method is presented. This method is using the heat balance in each divided tank and flow rates are estimated by using temperature data which are easy to be measured. Firstly, the accuracy of estimation method is confirmed by the generated data of system simulation without measurement error. Then the results of flow rate estimation by the measured data in real buildings are reported.
