23 September 2011

THE EFFECT OF INTRODUCING OF HEAT PUMP FOR HEAT SOURCE SYSTEM AT THE UNIVERSITY -A CASE AT CHUO UNIVERSITY TAMA CAMPUS


As reducing the environmental load becomes more important, we have been tracking energy consumption data and implementing improvements at Chuo University Tama Campus. Measures such as increasing lighting efficiency and improving operations have yielded steady results in reducing CO2 emissions. However, to further reduce the environmental load, the main heat source system was renovated in fiscal 2008 to improve heat generation efficiency. The university eliminated the centralized system that high-temperature water generated from an oil boiler was transferred to two substations and supplied hot and cold water generated from the heat exchangers and absorption refrigerators in the substations to each building. And several ice thermal storage air conditioning systems and electric heat pumps were distributed. The measures eliminated existing problems such as energy loss during transfer and too much auxiliary equipment power, and improved heat generation efficiency. At the same time, the university also changed the main energy source from oil to electricity. Compared to before renovating the heat source system, heat generation efficiency increased by about 50%, and CO2 emissions reduced about 3,200 tons.