Evaluation of Performance-Testing Procedures Associated with ASHRAE Standard 94.2: Electrically Heated Thermal Energy Storage Central Units

摘要

Research associated with performance evaluation of electrically heated thermal energy storage central units in accordance with ASHRAE Standard 94.2 is described. A 30 kW central unit was used for conducting the experimental work. Two different arrangements were studied in regard to placement of the nozzle associated with the air flow rate measurement. It was discovered that the inlet air temperature level has a small influence on the reported thermal performance of the TES device, but a significant influence on both the thermal discharge rate and thermal discharge period. The neglect of humidity level of the inlet air was found to result in errors no larger than 1/2%. Test results obtained for the unit when containing domestic olivine energy storage bricks were compared with corresponding test results obtained employing English olivine bricks. The results indicate that the thermal performance of the unit was approximately the same regardless of the type of olivine brick employed. (ERA citation 07:047169)