摘要
介绍了低温热发电技术和第二类吸收式热泵技术的基本原理与应用案例,包括低温热有机朗肯循环发电,第二类吸收式热泵制取低压蒸汽、供暖热水。基于热效率和火用效率的分析评价表明,提升低温热的能级是两类技术的共性特征,这两类技术的热效率均偏低。从热效率和火用效率角度分析,第二类吸收式热泵技术优于低温热发电技术;从产品能源能级角度分析,低温热发电技术优于第二类吸收式热泵技术。当低温热供给温度高于110℃时,推荐低温热发电技术;低温热供给温度高于110℃、且全厂低压蒸汽不足时,推荐第二类吸收式热泵产低压蒸汽技术;低温余热资源供给温度高于110℃、且存在冬季供暖工况,或存在大量低温热阱时,推荐第二类吸收式热泵制取热媒水技术。
The basic principles and applications of the low-temperature heat power generation tectmology and the type II absorption heat pump technology in refineries are introduced, which include organic Rankine cycle power generation technology, type II absorption heat pump technology to generate low-pressure steam or hot water. The energy and exergy efficiency analysis and evaluation conclude that the essence of the two techniques is to raise the energy level of the low-temperature heat which results in low energy efficiency. According to analysis of the energy and exergy efficiency, the type II absorption heat pump technology is superior to the low-temperature heat power generation technology. When the supply temperature of low-temperature heat is higher than 110 ℃, the power generation technology is recommended. When the supply temperature of low-temperature heat is higher than 110 ℃ and the whole plant low-pressure steam supply is in shortage, type II absorption heat pump technology is recommended to generate low-pressure steam. When the supply tempera- ture of low-temperature heat is higher than 110 ℃, the winter heating is required or a large number of low-temperature heat sink can use the low-temperature heat, the type II absorption heat pump technology is recommended to generate hot water .
出处
《炼油技术与工程》
CAS
2017年第5期53-57,共5页
Petroleum Refinery Engineering
关键词
低温热
发电
第二类吸收式热泵
节能
炼油厂
low-temperature heat, power generation, type II absorption heat pump, energy saving, refinery
