Abstract
Conservation of energy consumption is a pressing issue all over the world, especially for office buildings where the energy consumption has continued increasing. Cogeneration system is expected to play an effective role in energy conservation. We researched energy consumption and operation situation of gas engine cogeneration system at Keio University Shonan Fujisawa Campus from November 1, 2004 to October 31, 2005. The energy consumption at the campus is caused mainly by electricity and air-conditioning. The central system with gas-fired absorption heater chillers is the major air-conditioning system of the campus, and exhaust heat of the gas engine is effectively reused in the system by a heat exchanger in winter or an absorption chiller in summer. The effectiveness of the cogeneration system was examined taking the influence on grid power and the gas-fired absorption heater chillers into consideration, and found that the effectiveness varies seasonally depending on air-conditioning demand.
