Abstract
Energy use and CO2 emission for heating and cooling system in a National Institute in Tsukuba, Ibaragi were analyzed. Comparisons of energy use, CO2 emission and operational cost for annual bases were also made for the present intensive heating and cooling system and an alternative system of personal air conditioning. The following results were obtained by the present analysis : 1) energy use of personal system was superior to the intensive system, 2) CO2 emission from the personal system was lower than that of the present intensive system using kerosene as the fuel, but, is nearly equal to the present system if the fuel is changed to natural gas, 3) the intensive system using kerosene and even using natural gas, the operational costs were estimated to be lower than that of the personal system.
