Theoretical study on the effect of operating conditions on performance of absorption refrigeration system

Kaynaklı, Ömer; Kılıç, Muhsin

doi:10.1016/j.enconman.2006.06.005

Cited by 166 publications

(58 citation statements)

References 17 publications

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“…Indeed, for the work region presented, an increase of approximately 40 °C on the solar converter generates an increase of approximately about 28% of the COP. The different analysis discussed are in conformity with the work of Kaynakli et al [12] who proposed a thermodynamic analysis of a water/lithium bromide absorption refrigeration cycle. In particular, they highlighted the effects of operating temperature and effectiveness of heat exchanger on the thermal loads of components, coefficient of performance and efficiency ratio.…”

Section: Solar Converter Temperature Effect On the Coefficient Of Persupporting

confidence: 50%

“…In fact, both of the studies illustrate the increasing evolution of the COP along the generator temperature range of 80 °C to 95 °C. However, Kaynakli et al [12] fixed the condenser and the evaporator temperatures to study the effect of the generator temperature on the COP, while we fixed the entropy production after an analysis of the evolution function of the solar concentrator for fixed cold and intermediate source temperatures at 10 °C and 28 °C, respectively. Kaynakli et al [12] found that, for Tg between 80 °C and 95 °C, the COP has an increasing evolution (as a function of the generator temperature) for a fixed condenser temperature and fixed evaporator temperature.…”

Section: Generator Temperature Effect On the Coefficient Of Performancementioning

confidence: 99%

“…However, Kaynakli et al [12] fixed the condenser and the evaporator temperatures to study the effect of the generator temperature on the COP, while we fixed the entropy production after an analysis of the evolution function of the solar concentrator for fixed cold and intermediate source temperatures at 10 °C and 28 °C, respectively. Kaynakli et al [12] found that, for Tg between 80 °C and 95 °C, the COP has an increasing evolution (as a function of the generator temperature) for a fixed condenser temperature and fixed evaporator temperature. The COP varied approximately between 60% and 71% for Tc = 40 °C and Te = 8 °C; and between 78% and 80% for Tc = 35 °C and Te = 8 °C for Tg between 80 °C and 95 °C, which means less than a 2% of COP increase.…”

Section: Generator Temperature Effect On the Coefficient Of Performancementioning

confidence: 99%

See 2 more Smart Citations

Hierarchical Decomposition Thermodynamic Approach for the Study of Solar Absorption Refrigerator Performance

Berrich

Fellah

Brahim

et al. 2016

Entropy

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A thermodynamic approach based on the hierarchical decomposition which is usually used in mechanical structure engineering is proposed. The methodology is applied to an absorption refrigeration cycle. Thus, a thermodynamic analysis of the performances on solar absorption refrigerators is presented. Under the hypothesis of an endoreversible model, the effects of the generator, the solar concentrator and the solar converter temperatures, on the coefficient of performance (COP), are presented and discussed. In fact, the coefficient of performance variations, according to the ratio of the heat transfer areas of the high temperature part (the thermal engine 2) A h and the heat transfer areas of the low temperature part (the thermal receptor) A r variations, are studied in this paper. For low values of the heat-transfer areas of the high temperature part and relatively important values of heat-transfer areas of the low temperature part as for example A h equal to 30% of A r , the coefficient of performance is relatively important (approximately equal to 65%). For an equal-area distribution corresponding to an area ratio A h /A r of 50%, the COP is approximately equal to 35%. The originality of this deduction is that it allows a conceptual study of the solar absorption cycle.

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Section: Solar Converter Temperature Effect On the Coefficient Of Persupporting

confidence: 50%

Section: Generator Temperature Effect On the Coefficient Of Performancementioning

confidence: 99%

Section: Generator Temperature Effect On the Coefficient Of Performancementioning

confidence: 99%

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Hierarchical Decomposition Thermodynamic Approach for the Study of Solar Absorption Refrigerator Performance

Berrich

Fellah

Brahim

et al. 2016

Entropy

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“…For that reason, research and development activities are necessary in order to reduce the cost of using solar assisted air conditioning in buildings [4][5]. There are a lot of researches referred to theoretical studies [6][7][8][9], but the information of experimental studies in this kind of installations is scarce [10]. Away other reasons about this, is the difficulty for designing solar cooling systems.…”

Section: Introductionmentioning

confidence: 99%

Monitoring and simulation of an existing solar powered absorption cooling system in Zaragoza (Spain)

Monné

Alonso

Palacin

et al. 2011

Applied Thermal Engineering

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“…For the purposes of the calculation some assumptions regarding the absorption chillers Coefficient of Performance (COP) were made [7,8]. where: ∆ = − The above formula makes it possible to calculate the supply water mass flow needed to produce 100% cooling capacity.…”

Section: Calculation Of Hot Water Flow Rate For Supplying Arsmentioning

confidence: 99%

Analysis of a combined heating and cooling system model under different operating strategies

Dzierzgowski

Zwierzchowski

2017

E3S Web Conf.

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Abstract. The paper presents an analysis of a combined heating and cooling system model under different operating strategies. Cooling demand for air conditioning purposes has grown steadily in Poland since the early 1990s. The main clients are large office buildings and shopping malls in downtown locations. Increased demand for heat in the summer would mitigate a number of problems regarding District Heating System (DHS) operation at minimum power, affecting the average annual price of heat (in summertime the share of costs related to transport losses is a strong cost factor). In the paper, computer simulations were performed for different supply network water temperature, assuming as input, real changes in the parameters of the DHS (heat demand, flow rates, etc.). On the basis of calculations and taking into account investment costs of the Absorption Refrigeration System (ARS) and the Thermal Energy Storage (TES) system, an optimal capacity of the TES system was proposed to ensure smooth and efficient operation of the District Heating Plant (DHP). Application of ARS with the TES system in the DHS in question increases net profit by 19.4%, reducing the cooling price for consumers by 40%.

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Theoretical study on the effect of operating conditions on performance of absorption refrigeration system

Cited by 166 publications

References 17 publications

Hierarchical Decomposition Thermodynamic Approach for the Study of Solar Absorption Refrigerator Performance

Hierarchical Decomposition Thermodynamic Approach for the Study of Solar Absorption Refrigerator Performance

Monitoring and simulation of an existing solar powered absorption cooling system in Zaragoza (Spain)

Analysis of a combined heating and cooling system model under different operating strategies

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