Increasing energy efficiency of a combined head and power plant using the heat storage

摘要

The demand of heat of the urban consumers registers rather great variations from one season to another. The thermal load curve flattening, in hot and intermediate seasons, is possible due to the accumulation of heat during the periods of time when the heat consumption is low and its utilization during the thermal load peak periods. The paper analyzes the integration of heat accumulation using water sensible heat in a Combined Heat and Power Plant (CHPP) from Romania, with Reciprocating Gas Engines (RGE) and hot water boilers (HWB). The solution selected presupposes the adaption of an existing heavy fuel oil tank. Utilization of heat accumulation in the CHPP makes it possible both to diminish the time of HWB utilization and the increase in the energy produced in cogeneration, and the utilization of the RGE at maximum continuous load.