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                  为什么热泵制热?#28909;?#27668;热水锅炉省钱?

                  文章出处: 人气:756发表时间:2016-08-28 02:29:22

                  热泵制热比用燃气热水锅炉制热节省费用的原因主要有两个方面。

                  1)热泵的制热能效比(COP)高。COP是制热循环中产生的制热量与制热所耗电功率之比,通常热泵的制热能效比可达到3.5左右。这就是说:消耗一份电功率可产生3.5份热能。而燃气热水锅炉的换热效率为0.82左右,即消耗一份热量只能产生0.82份热量。

                  2)天然气价格高。在我国南方一些地区,天然气单价为34/m3,而电价为0.51/kWh

                  举例来说:气田天然气平均低热发热量是35544kJ/m3,化为以kWh为单位是9.873kWh。意即:1立方天然气完全燃烧可产生的热量是9.873kWh。由于燃气热水锅炉的换热效率是0.82,所以产生9.873kWh热量实际需要燃烧的天然气量是1.22立方(1/0.82),若当地天然气价格是3.25/ m3,那么费用为3.965元。同样用热泵产生9.873kWh的热量,输入功率为9.873/3.5 = 2.82kWh,当地电价为0.9/kWh,则费用为2.538元,?#28909;?#27668;热水锅炉少用1.427元,节省费用36%

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