Xingxing Ma , Jinfeng Wang , Jing Xie , Hao Xu , Guosen Ye , Jilin Jiang , Xinrong Han
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引用次数: 0
Abstract
Zero superheat degree at the outlet of the evaporator is important for the efficient operation of refrigeration systems. Though it is the theoretically possible to control zero superheat degree to zero, it is rare to find publications in this area. In this study, the effects of the electronic expansion valve and the pressure regulation valve on zero superheat control investigated experimentally. The results indicate that when the control value of degree was set to zero, the electronic expansion valve could not achieve accurate control. The evaporation pressure and temperature kept changing, and the refrigerant flow state at the outlet of the evaporator alternated dramatically at the same time. There was a significant appearance of liquid refrigerant at the evaporator outlet. However, the stable control of zero superheat could be achieved when using the Electronic Expansion Valve and Pressure Regulation Valve Common Control Method (EPCCM). The combination of the pressure regulation valve and the Electronic Expansion Valve enables independent control of the evaporation pressure and the superheat degree at the outlet of the evaporator, which makes it possible to control the superheat of the refrigerant at the outlet of the evaporator to zero. The experiment results also show that the EPCCM has remarkable effect on zero superheat control, as well as safe and stable operation of the refrigeration systems.
期刊介绍：
Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.
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