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A high performance desiccant dehumidification unit using solid desiccant coated heat exchanger with heat recovery
Highlights A novel desiccant coated heat exchanger (SCHE) with heat recovery device (HRD) is developed. An experimental set-up has been constructed and its performance was tested and analyzed. A comparison between the novel system with HRD and the conventional system without HRD was made.
Abstract A new type of solid desiccant dehumidification cycle with internal heat recovery based sorptive material coated heat exchanger (SCHE) is proposed. This system can realize waste heat recovery from exhausted air in regeneration process, in which a heat recovery device (HRD) is adopted. The performance evaluation of the novel cycle is compared with that of the conventional cycle without HRD in terms of moisture and energy transfer. Based on the experimental results, the thermal coefficient of performance of the system has been improved to 1.2, almost twice the thermal coefficient of performance of the conventional cycle without HRD. The electrical coefficient of performance can reach about 13.83. When HRD is involved in the system, the supply air temperature is close to the inlet temperature of process air (ambient air), dehumidification capability meets the design requirements (lower than 8gkg−1) and the regeneration temperature can satisfy the regeneration requirement of low grade heat source. The thermal efficiency of the HRD is calculated as 0.88 on average. As a conclusion, SCHE with HRD system could be a potential alternative with effective operation which can be promoted in higher humidity and temperature areas.
A high performance desiccant dehumidification unit using solid desiccant coated heat exchanger with heat recovery
Highlights A novel desiccant coated heat exchanger (SCHE) with heat recovery device (HRD) is developed. An experimental set-up has been constructed and its performance was tested and analyzed. A comparison between the novel system with HRD and the conventional system without HRD was made.
Abstract A new type of solid desiccant dehumidification cycle with internal heat recovery based sorptive material coated heat exchanger (SCHE) is proposed. This system can realize waste heat recovery from exhausted air in regeneration process, in which a heat recovery device (HRD) is adopted. The performance evaluation of the novel cycle is compared with that of the conventional cycle without HRD in terms of moisture and energy transfer. Based on the experimental results, the thermal coefficient of performance of the system has been improved to 1.2, almost twice the thermal coefficient of performance of the conventional cycle without HRD. The electrical coefficient of performance can reach about 13.83. When HRD is involved in the system, the supply air temperature is close to the inlet temperature of process air (ambient air), dehumidification capability meets the design requirements (lower than 8gkg−1) and the regeneration temperature can satisfy the regeneration requirement of low grade heat source. The thermal efficiency of the HRD is calculated as 0.88 on average. As a conclusion, SCHE with HRD system could be a potential alternative with effective operation which can be promoted in higher humidity and temperature areas.
A high performance desiccant dehumidification unit using solid desiccant coated heat exchanger with heat recovery
Zhao, Y. (author) / Dai, Y.J. (author) / Ge, T.S. (author) / Wang, H.H. (author) / Wang, R.Z. (author)
Energy and Buildings ; 116 ; 583-592
2016-01-17
10 pages
Article (Journal)
Electronic Resource
English
Performance evaluation of a desiccant coated heat exchanger with two different desiccant materials
| BASE | 2018
| Taylor & Francis Verlag | 2022