Equilibrium low pressure generator temperatures for double-effect series flow absorption refrigeration systems

Arun, M.; Maiya, M.P.; Murthy, S. Srinivasa

doi:10.1016/s1359-4311(99)00029-0

Cited by 50 publications

(15 citation statements)

References 4 publications

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“…Temperature, entropy, pressure, density and all thermodynamic properties are obtained from NIST/ASME steam properties database [12] which is based on the limits of the cascade system design. From the known properties, a code for each working fluid was used…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Arun et al [12] presented the performace analysis of a double-effect in series LiBr/H 2 O absortion system in wich all the vapour generated at the high pressure generator is fully condensed at the low pressure generator. Garousi et al [13] carried out first and second law analyses for series, parallel and reverse parallel double-effect absorption refrigeration cycles and compared the results.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance comparison between a conventional vapor compression and compression-absorption single-stage and double-stage systems used for refrigeration

Colorado

Rivera

2015

Applied Thermal Engineering

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance comparison between a conventional vapor compression and compression-absorption single-stage and double-stage systems used for refrigeration

Colorado

Rivera

2015

Applied Thermal Engineering

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“…The first kind of simulation is under normal condition. It is widely used in system design or used to discuss cycle performance in different normal conditions (Liu and Wang, 2004;Arun et al, 2000;Wu et al, 2014;Fumo et al, 2011;handbook.sys, 2008). There are mainly three steps as shown in Fig.…”

Section: Methodologiesmentioning

confidence: 99%

“…Therefore, a mixed effect AC, which couples single effect process and double effect process in one AC unit, seems to be a more favourable choice. Some researchers (Liu and Wang, 2004;Arun et al, 2000;Han et al, 2010) have proposed to use waste heat or solar energy as auxiliary heating source to power the low pressure generator of double effect AC, which equals to mixed effect AC. However, research on mixed effect AC is still few, and there especially lacks research on off-design operation and discussion in CCHP system.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a mixed effect absorption chiller powered by jacket water and exhaust gas waste heat of internal combustion engine

Wang

2015

International Journal of Refrigeration

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“…In order to improve coefficient of performance (COP) and reduce the heat source temperature, many kinds of novel solar absorption refrigerant systems were developed and studied [1][2][3][4][5][6][7] . Because of the difficulties associated with the solar-heating system's long-term operation at a steady state, a refrigeration cycle powered by both heat and electric energy was proposed.…”

Section: Dual-chamber Vortex Generator Absorption Chiller Solarmentioning

confidence: 99%

Experimental research of a novel vortex generator for solar absorption chiller

Wang

2009

Sci. China Ser. E-Technol. Sci.

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In this study, a novel generator for the single-effect LiBr-H 2 O absorption chiller using solar energy was investigated. A dual-chamber vortex generator (DCVG) consisted of a lower chamber and an upperchamber. The hot weak LiBr-H 2 O liquid entered the lower chamber tangentially through a small nozzle to create a strong vortex flow. Due to the rotating flow, the pressure was reduced toward the central portion of the lower chamber. Experiments were conducted under different solution flow rates and temperatures. The experimental results showed that the lower pressure developed in the lower chamber could reduce the saturated temperature and help the evaporation in the generator that is more heat could be utilized to generate more refrigerant vapor. When the inlet temperature was 90℃, the COP of a solar absorption chiller using the DCVG could reach 0.83, which was higher than of the conventional absorption chiller by 22%. dual-chamber vortex generator, absorption chiller, solarIn recent years, many researches have been carried out on refrigeration systems driven by solar energy, which achieves conservation of conventional energy and reduction of environmental pollution. In order to improve coefficient of performance (COP) and reduce the heat source temperature, many kinds of novel solar absorption refrigerant systems were developed and studied [1][2][3][4][5][6][7] . Because of the difficulties associated with the solar-heating system's long-term operation at a steady state, a refrigeration cycle powered by both heat and electric energy was proposed. A compressor was used to maintain stable energy input to the absorption refrigeration system, though this still consumed electric energy [1] . A pump-free absorption refrigeration system without solution pump was attractive [4] since this system was driven by a low-temperature heat source. A second generator together with an efficient lunate thermosiphon elevation tube was used to reduce the minimum driving temperature of system and improve the solar energy utilization. Spiral grooved tube was used to enhance the heat and mass transfer of the falling film generator [7] . The heat and mass transfer were enhanced through spraying solution into the spiral grooved tubes directly which were distributed in the falling film generator. The utilization of low-temperature heat source for absorption chiller was improved.In this paper a novel dual-chamber vortex generator was proposed for the solar absorption chiller. A dual chamber vortex generator (DCVG) consisted of a lower chamber and an upper chamber. Due to the rotating flow, the pressure and the saturated temperature of solution were reduced in the vortex generator. The available temperature difference of lower-temperature heat source from an external resource increased to generate more refrigerant vapor and improve the COP of the solar absorption chiller.

show abstract

Equilibrium low pressure generator temperatures for double-effect series flow absorption refrigeration systems

Cited by 50 publications

References 4 publications

Performance comparison between a conventional vapor compression and compression-absorption single-stage and double-stage systems used for refrigeration

Performance comparison between a conventional vapor compression and compression-absorption single-stage and double-stage systems used for refrigeration

Investigation of a mixed effect absorption chiller powered by jacket water and exhaust gas waste heat of internal combustion engine

Experimental research of a novel vortex generator for solar absorption chiller

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