一般的外热式煅烧设备虽然直接使用一次热源，但热效率很少超过50%。
Few ordinary external heat calcining equipments' heat efficiency exceeds 50%, though they directly use primary heat source.
进而对以燃煤锅炉为辅助热源的太阳能直接供暖系统与水源热泵的一次能源消耗进行了对比分析。
The primary energy consumption of a DSHS with a coal-fired boiler supplement source is compared with that of a WSHP.
基于工程实践参数，定量比较了城市污水源热泵与其他冷热源的一次能源利用率。
Study on key sectors of applying untreatment sewage water of city using as cool and heat sources;
基于工程实践参数，定量比较了城市污水源热泵与其他冷热源的一次能源利用率。
Study on key sectors of applying untreatment sewage water of city using as cool and heat sources;
应用推荐