动力集中式与动力分布式供热系统的经济性评价

Economic Evaluation of Power Centralized and Power Distributed Heating Systems

以8个用户(热力站)且负荷均匀分布的枝状热网为例,对动力集中式供热系统(以下称为方案1)、零压差点设置在热源处的动力分布式供热系统(以下称为方案2)、零压差点设置在用户4的动力分布式供热系统(以下称为方案3)的经济性进行评价,分别计算3种方案的设备造价、年电费、费用年值。对于费用年值,方案2的费用年值最低,其次为方案3,方案1的费用年值最高。由费用年值可知,对于设置8个用户且负荷均匀分布的枝状热网,零压差点设置在热源处的动力分布式供热系统的经济性最优。

Taking a tree-shaped heat-supply network with 8 users（ substation） and even load distribution as an example,the economies of power centralized heating system（ hereinafter referred to as scheme1）,power distributed heating system with zero-pressure difference at the heat source（ hereinafter referred to as scheme 2） and power distributed heating system with zero-pressure difference at user 4（ hereinafter referred to as scheme 3） are evaluated,and the equipment cost,annual electricity fee and annual cost of the three schemes are calculated respectively. The annual cost of scheme 2 is the lowest,followed by scheme 3,and the annual cost of scheme 1 is the highest. According to the annual cost,it is known that for a tree-shaped heatsupply network with 8 users and even load distribution,the economy of power distributed heating system with zero-pressure difference at the heat source is optimal.