先进制造业知识服务平台
国家科技图书文献中心机械分馆　　工信部产业技术基础公共服务平台　　国家中小企业公共服务示范平台

Evaluation of heat pump dryers from the perspective of energy efficiency and operational robustness
参考中译:从能效和运行稳健性角度评价热泵干燥机


          

刊名：Applied Thermal Engineering
作者：Jia-Hao Cheng（Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University）
Wen Yu（Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University）
Xiang Cao（Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University）
Liang-Liang Shao（Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University）
Chun-Lu Zhang（Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University）
刊号：725C0058
ISSN：1359-4311
出版年：2022
年卷期：2022, vol.215
页码：118995-1--118995-17
总页数：17
分类号：TK12
关键词：Heat pump dryer；Energy performance；Operational robustness；Off-design；Experiment；Simulation
参考中译：热泵干燥器；能量性能；运行稳健性；变设计；实验；仿真
语种：eng
文摘：Vapor compression heat pump dryers (HPDs) are widely applied in food and industrial drying. Many efforts have been devoted to evaluating the HPD performance from the perspectives of energy, exergy, economy, etc. The current work offers a perspective of both energy efficiency and operational robustness to evaluate HPDs, intending to measure their design and off-design performance for various drying applications. Based on the proposed method, a case study on conveyor seaweed drying is presented. The preferable system(s) are found out among three candidates in general use, i.e., the basic heat pump dryer HPD_(basic), the HPD with air bypass HPD_(bypass), and the HPD with air bypass and subcooler HPD_(subcooler). The results show that, HPD_(basic) is not applicable for seaweed drying due to the required huge circulating air flow rate. HPD_(bypass) and HPD_(subcooler) are more preferred with better energy performance and operational robustness. Moisture extraction rate (MER) of 30.4 kg/h and specific moisture extraction rate (SMER) of 2.20 kg/kWh are reached in HPD_(bypass) at the design condition (T_(db) = 45℃, RH = 0.4), and are further increased to 35.8 kg/h and 2.58 kg/kWh in HPD_(subcooler). Meanwhile the off-design robustness indices are 0.14 and 0.22 for HPD_(bypass) and HPD_(subcooler), and can be enlarged to 0.19 and 0.33 after reselecting a compressor withstanding condensing temperature up to 58℃ (2℃ higher). Besides, HPD_(bypass) and HPD_(subcooler) can bear at least 30% air leakage in operation. Finally, operational robustness on other applications is also discussed for conveyor and batch dryers.
参考中译：蒸汽压缩热泵干燥器在食品和工业干燥中有着广泛的应用。人们从能源、(火用)、经济等角度对HPD的性能进行了大量的研究。目前的工作从能源效率和运行稳健性两个角度对HPD进行了评估，旨在为各种干燥应用测量其设计和设计外性能。在此基础上，给出了海藻输送机干燥的实例研究。在基本热泵干燥器HPD_(BASIC)、送风旁路HPD_(BASIC)和送风旁路加过冷器HPD_(过冷器)三种备选方案中选出了较好的方案。结果表明，HPD_(BASIC)由于需要较大的循环风量，不适用于海藻干燥。HPD_(旁路)和HPD_(过冷器)具有较好的能量性能和运行稳健性。在设计工况(Tdb=45℃，RH=0.4)下，HPD旁路的抽湿率和比抽湿率分别达到30.4 kg/h和2.20 kg/kWh，而HPD过冷器则进一步提高到35.80 kg/h和2.58 kg/kWh。同时，HPD旁路和HPD过冷器的变工况稳健性指数分别为0.14和0.22，重新选择冷凝温度高达58℃(2℃以上)的压缩机后，变工况稳健性指数可扩大到0.19和0.33。此外，HPD旁路和HPD过冷器在运行中至少能承受30%的漏风。最后，还讨论了输送机和间歇式干燥机在其他应用中的运行稳健性。



国家科技图书文献中心  全球文献资源网  京ICP备05055788号-26  机械工业信息研究院 2018-2024