Differences of energy saving quantities for absorption‐compression hybrid cooling systems with cascade condenser and cascade subcooler

Peng, Zeyu; Li, Zeyu; Zeng, Junquan; Xu, Yongrui

doi:10.1002/er.7033

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…The expression of compressor work and heat exergy for solar assisted hybrid cooling systems with sufficient and insufficient heat quantity is listed in The thermodynamic models of layout with cascade condensation process and layout with cascade subcooling process have been validated in our previous study [45], respectively according to Ref. [25] and [39].…”

Section: Thermodynamic Modelmentioning

confidence: 99%

Thermodynamic Study of Solar Assisted Hybrid Cooling Systems With Consideration of Duration in Heat-Driven Processes

Peng¹,

Li²,

Zeng³

et al. 2022

Preprint

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Solar assisted hybrid cooling systems are promising for the energy saving of refrigeration systems. In most cases, the solar thermal gain is only able to power the heat-driven process of facilities in part of the working period. Therefore, the reduction of compressor power strongly depends upon the duration of heat-driven processes, which has not been addressed properly. Motivated by such knowledge gap, the thermodynamic understanding of solar assisted hybrid cooling systems is deepened through considering the duration in heat-driven processes. Three absorption-compression integrated cooling cycles were taken as examples. It is found that optimal parameters, e.g., inter-stage pressure and temperature, corresponding to various performance indicators trend to be identical, as the duration of heat-driven processes is taken into account. Furthermore, the optimal parameter for different working conditions was obtained. It is displayed that the dimensionless optimal intermediate temperature of layout with the cascade condensation process varies slightly, e.g., 4%, for different conditions. Moreover, the fall of compressor power in entire working periods is nearly independent upon the intermediate temperature. The paper is favorable for the efficient design and operation of solar assisted hybrid cooling systems.

show abstract

Section: Thermodynamic Modelmentioning

confidence: 99%

Thermodynamic Study of Solar Assisted Hybrid Cooling Systems With Consideration of Duration in Heat-Driven Processes

Peng¹,

Li²,

Zeng³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The duration in heat-driven processes is defined according to [45], which ranges from 0 to 1. Heat-driven processes can operate in the whole working period when the duration in heat-driven processes equals 1, i.e., the heat quantity satisfies the generator heat load.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

“…The thermodynamic models of the layout with a cascade condensation process and layout with a cascade subcooling process have been validated in our previous study [45], respectively, according to Refs. [25,39].…”

Section: Model Comparison and Case Studymentioning

confidence: 99%

Thermodynamic Study of Solar-Assisted Hybrid Cooling Systems with Consideration of Duration in Heat-Driven Processes

Peng

Zeng

et al. 2022

Energies

Self Cite

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Solar-assisted hybrid cooling systems are promising for the energy saving of refrigeration systems. In most cases, the solar thermal gain is only able to power the heat-driven process of facilities during part of the working period. Therefore, the reduction of compressor power strongly depends upon the duration of heat-driven processes, which has not been addressed properly. Motivated by such a knowledge gap, the thermodynamic understanding of solar-assisted hybrid cooling systems is deepened through considering the duration in heat-driven processes. Three absorption–compression-integrated cooling cycles were taken as examples. It was found that optimal parameters, e.g., inter-stage pressure and temperature, corresponding to various performance indicators tend to be identical, as the duration of heat-driven processes is taken into account. Furthermore, the optimal parameter for different working conditions was obtained. The dimensionless optimal intermediate temperature of layout with the cascade condensation process varies slightly, e.g., 4%, for different conditions. Moreover, the fall of compressor power in the entire working period was nearly independent upon the intermediate temperature. The paper is favorable for the efficient design and operation of solar-assisted hybrid cooling systems.

show abstract

Air-source hybrid absorption-compression heat pumps with three-stage thermal coupling configuration for temperature lift over 150 °C

Zhang

Wang

2022

Energy Conversion and Management

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Differences of energy saving quantities for absorption‐compression hybrid cooling systems with cascade condenser and cascade subcooler

Cited by 8 publications

References 31 publications

Thermodynamic Study of Solar Assisted Hybrid Cooling Systems With Consideration of Duration in Heat-Driven Processes

Thermodynamic Study of Solar Assisted Hybrid Cooling Systems With Consideration of Duration in Heat-Driven Processes

Thermodynamic Study of Solar-Assisted Hybrid Cooling Systems with Consideration of Duration in Heat-Driven Processes

Air-source hybrid absorption-compression heat pumps with three-stage thermal coupling configuration for temperature lift over 150 °C

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