Effect of Heat-electricity Cogeneration on Economic Benefit of Power Plant

In view of the main problems existing in current benefit accounting method of cogeneration, this article puts forward a new accounting method and details three stages of flew method, i.e., appraisalsand decisions of economic indexes, various costs and total amount of profit, further analyzes the offect of cogeneration on economic benefit of power plant and indicates that the benefit of cogeneration can be realized only when the price ratio of heat/electricity reaches a certain extent.