Emission and Trends in Reclaiming Waste Heat in Industrial Instalations

Hys, L.; Wiak, Tomasz

doi:10.5604/2081139x.1043170

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…In the process of industrial production, a large amount of energy is lost to the environment, resulting in a serious waste of energy. The recovery of this waste heat can provide electrical, thermal or mechanical energy, thereby improving energy efficiency, the full development and utilization of which can make a great contribution to energy conservation and emission reduction [1][2][3]. At present, there are many forms of waste heat resources in Chines industrial production, and these industrial waste heat resources are divided into: high temperature, medium temperature, and low temperature waste heat according to the temperature size [4][5].…”

Section: Introductionmentioning

confidence: 99%

Performance Optimization Analysis of An Air-source Heat Pump with Multi-Stage Waste Heat Recovery

Xu,

Xueye,

Jiachao

et al. 2024

E3S Web Conf.

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In this paper presents the effect of different outdoor ambient temperatures and heating temperatures on the performance of an air-source heat pump drying system with multi-stage waste heat recovery has been analysed by recording actual operating status of the system for a little longer-term period. The results show that COP of the heat pump with any heat recovery mode will increase with heating temperature reduction or ambient temperature rising like that does it without heat recovery. As outdoor ambient temperature increasing, the suitable heat recovery mode to enhance COP of the heat pump drying system changes from mode 1-3 to mode 1-2-3 and then to mode 1-2. Especially outdoor low-temperature ambient conditions in winter, 1-3 under would both enhance COP and improve the problem of evaporator frost. But the waste heat utilization rate ηT of whole system is lowest. Moreover, it can be supposed by comparing η with ηT that the first-stage heat exchanger unit of the heat recovery system and the energy transfer fluid circulating in the system would be potential for optimization to further enhance the performance of whole air-source heat pump drying system.

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Section: Introductionmentioning

confidence: 99%

Performance Optimization Analysis of An Air-source Heat Pump with Multi-Stage Waste Heat Recovery

Xu,

Xueye,

Jiachao

et al. 2024

E3S Web Conf.

View full text Add to dashboard Cite

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Waste Heat Recovery by Air-to-Water Heat Pump from Exhausted Ventilating Air for Heating of Multi-Family Residential Buildings

2021

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The paper presents an analysis of the application of an air-to-water electric compressor heat pump (AWHP) for the recovery of waste heat from the exhaust air in a typical multifamily residential building and the use of this heat for space heating, as well as the impact of this solution on the building energy performance (the PPR index). Simulations were performed in TRNSYS for five locations in Poland (Koszalin, Wrocław, Lublin, Białystok, Suwałki), for various heating system parameters (80/60 °C, 75/65 °C, 70/50 °C, 55/45 °C, 35/28 °C), for various temperature limitations of heat pump operation. It was shown that the analyzed system has great potential from an energy and environmental point of view. It can provide significant benefits in terms of the energy performance of the building, depending on the system parameters. The results show that the most energy-efficient system is the one with the lowest heating system temperatures. Moreover, implementing a temperature limitation on the heat pump operation improves its efficiency, but the higher the design parameters of the heating installation and the lower the limitation, the lower the heat pump contribution, and the higher the SCOP and the PPR. The energy effect is also influenced by location, but its scale depends on the parameters of the heating system and the temperature limitation of the heat pump’s operation. It is more significant for lower heating system parameters. This system enables the possibility of further reducing the demand for nonrenewable primary energy by powering the heat pump with photovoltaic cells.

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Emission and Trends in Reclaiming Waste Heat in Industrial Instalations

Cited by 2 publications

References 4 publications

Performance Optimization Analysis of An Air-source Heat Pump with Multi-Stage Waste Heat Recovery

Performance Optimization Analysis of An Air-source Heat Pump with Multi-Stage Waste Heat Recovery

Waste Heat Recovery by Air-to-Water Heat Pump from Exhausted Ventilating Air for Heating of Multi-Family Residential Buildings

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