Thermodynamic performance study on a novel absorption‐ compression cascade refrigeration activated by an internal combustion engine

Han, Xiao; Li, Jianbo; Kong, Xiangping; Sun, Tao; Zhang, Chen; Yin, Li

doi:10.1002/er.6484

Cited by 5 publications

(3 citation statements)

References 37 publications

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“…The required energy is supplied by a heat source. Various heat sources can be used to activate the process as long as the temperature of the source is at least 80 • C. The heat from the direct combustion of natural gas [21], exhaust heat from a microturbine system which is also used to generate electricity [22], the heat from an internal combustion engine's jacket coolant loop [23] and the heat generated by operating a phosphoric acid fuel cell [24] have been reported to have been used for this purpose. In comparison to vapor-compression refrigeration systems, absorption refrigeration systems do not achieve high COP values and are limited to COP values of less than 1.5 in practice.…”

Section: Advances In Heat-activated Cooling Systemsmentioning

confidence: 99%

Advanced Active and Passive Methods in Residential Energy Efficiency

Taherian

Peters

2023

Energies

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Energy efficiency in buildings is very important since it contributes significantly to fossil fuel consumption and consequently climate change. Several approaches have been taken by researchers and the industry to address the issue. These approaches are classified as either passive or active approaches. The purpose of this review article is to summarize a number of the technologies that have been investigated and/or developed. In this technical review paper, the more commonly used active and passive building energy conservation techniques are described and discussed. The pros and cons of both the active and passive energy techniques are described with appropriate reference citations provided. This review article provides a description to give an understanding of building conservation approaches. In the active classification, several methods have been reviewed that include earth-to-air heat exchangers, ground-source and hybrid heat pumps, and the use of new refrigerants, among other methods. In the passive classification, methods such as vegetated roofs, solar chimneys, natural ventilation, and more are discussed. Often, in a building, multiple passive and active methods can be employed simultaneously.

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Section: Advances In Heat-activated Cooling Systemsmentioning

confidence: 99%

Advanced Active and Passive Methods in Residential Energy Efficiency

Taherian

Peters

2023

Energies

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“…An absorption-compression combined refrigeration cycle activated by waste heat exhausted from an ICE to supply airconditioning cooling capacity was proposed in our previous study (Jianbo et al, 2020). In another work, a novel cascade refrigeration with a compression refrigeration cycle cascaded in the process is proposed to provide low-temperature cooling capacity for food freezing in ships or refrigerated trucks (Han et al, 2021). Results showed that both cycles had excellent performance coefficients.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and optimization of a novel cascade refrigeration system driven by waste heat

et al. 2023

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Direct discharge of waste heat from internal combustion engines (ICEs) is unfavorable for the efficient and clean fuel utilization. Here, a novel combined absorption-compression cascade refrigeration cycle is proposed to efficiently capture low-grade waste heat and supply cooling capacity for food freezing in vessels or refrigerated trucks. The intention of this work lies in: i) Comprehensively evaluating the performances of the proposed system; ii) Gaining the optimal operating conditions of the system. Aimed that, analysis models of energy, exergy, economy, and environment are set up to evaluate the sweeping performances. Further, multi-objective optimization is introduced to obtain the optimal operating parameters including evaporation and condensation temperature of the low-temperature stage, generation temperature and condensation temperature of the high-temperature stage, and cascade temperature differences. By applying multi-objective optimization, the coefficient of performance and exergy efficiency of the system are elevated from 1.283 to 1.547, and 0.222 to 0.246, respectively, the discharge amount of carbon dioxide are reduced from 71.40 to 59.57 tons year−1, and annual total cost are decreased from 16,028 to 15,055 $ year−1 compared to initial operating conditions.

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“…Furthermore, the COP for cascade system adopting double‐stage absorption chiller could be 50% higher than that for normal absorption‐compression cascade system 12 . Han et al 13 considered three operating modes of solution circulation in the two‐stage absorption chiller. It was demonstrated that the performance coefficient of the cascade cycle enhanced by 55.24% compared to the traditional two‐stage compression cascade cycle in the optimal working conditions.…”

Section: Introductionmentioning

confidence: 99%

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

Peng

Zeng

et al. 2021

Int J Energy Res

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Summary Absorption‐compression hybrid cooling systems with cascade condenser and cascade subcooler are able to effectively reduce compressor power by low‐grade heat. However, differences of both energy saving quantities still cannot be explained exactly through various types of coefficient of performance (COP) indicators, which is adverse for the decision‐making of appropriate layouts. In this regard, we attempt to illustrate the above‐mentioned issue from the new standpoint, that is, by decoupling processes and considering the limitation of thermodynamic cycles and refrigerant characteristics. It is found that there is the critical heat quantity corresponding to the order transition of energy saving for both layouts at first. Subsequently, critical heat quantities for different working conditions are obtained and analyzed. Moreover, expressions regarding critical heat quantities for five refrigerants are fitted by the neural network. It is displayed that the average difference between the critical heat quantity for R1234yf, R1234ze(E), R290 and R32 and that for ammonia is 7.89%, 4.08%, 4.78%, and 4%, respectively. The paper is helpful for decision‐making of absorption‐compression hybrid cooling systems with cascade condenser and cascade subcooler to enhance the amount of energy saving for certain quantities of low‐grade heat.

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Thermodynamic performance study on a novel absorption‐ compression cascade refrigeration activated by an internal combustion engine

Cited by 5 publications

References 37 publications

Advanced Active and Passive Methods in Residential Energy Efficiency

Advanced Active and Passive Methods in Residential Energy Efficiency

Evaluation and optimization of a novel cascade refrigeration system driven by waste heat

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

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