依据热经济学的基本原则提出一种多产品输出系统的产品单位火用成本分摊方法．该方法认为，当系统输出是多种形式的产品时，各产品的单位火用成本应该与该产品的能级具有单调增的函数关系，并由此建立火用成本分摊方程．该方法在纵横两个方向上都体现了热经济学中的火用的不等价特性和火用成本递增的原则，并有机地将产品火用成本与产品的能量品质联系起来，适用于各种不同类型的能量系统． According to the basic principles of thermal economics, a multi-product output system of product unit cost allocation method of exergy. The method considers that when the system output is a variety of products, the exergy cost of each product should have a monotonic increasing function with the energy level of the product, and then establish the exergy cost sharing equation. This method embodies the principle of unequal value of exergy and exergy cost in thermal economics in both vertical and horizontal directions and organically combines the exergy costs of products with the energy quality of the products. Different types of energy systems.