Mass recovery adsorption refrigeration cycle—improving cooling capacity

Akahira, Akira; Alam, Khurshid; Hamamoto, Yoshisuke; Akisawa, Atsushi; Kashiwagi, Takao

doi:10.1016/j.ijrefrig.2003.10.004

Cited by 120 publications

(32 citation statements)

References 12 publications

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“…In 1929, Hulse and Miller described an adsorption system using in the United States for the air conditioning system of railway carriages [2], in which Silica gel-sulphur dioxide was chosen as the adsorbent/adsorbate pair. In recent times, the adsorption pairs mostly used include ammonia-carbon [3,4], ammonia-salts [5,6], methanol-carbon [7,8], water-silica gel [9,10] and water-zeolite [11,12]. The sub-atmospheric refrigerants (water and methanol) have excellent thermodynamic properties but their specific cooling power (kW of cooling per kg of adsorbent) can be limited by low mass transfer rates resulting from pressure drops, internal diffusion etc.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the performance of solid sorption refrigeration systems using carbon dioxide as refrigerant

Zhong

Critoph

Thorpe

2006

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Evaluation of the performance of solid sorption refrigeration systems using carbon dioxide as refrigerant

Zhong

Critoph

Thorpe

2006

Applied Thermal Engineering

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“…The mass recovery cycle may greatly improve the system performance, compared with the conventional cycle powered by low temperature heat [7]. The process involves changing the pressure in adsorbent beds.…”

Section: Mass Recovery Cyclementioning

confidence: 99%

The cooling effect by adsorption-desorption cycles

Wolak

2017

E3S Web Conf.

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Abstract. Adsorption appliances may turn out to be an alternative to compression-type refrigerators. The adsorption refrigeration machine may be driven by a low-grade heat source, especially solar energy. Solar adsorption cooling systems are environment-friendly and have zero ozone depletion potential. Therefore, the adsorption refrigeration is one kind of energy saving refrigeration methods. The merits of the adsorption refrigeration systems will be more significant especially when it is used in vehicles (automobiles, ships and locomotives), to preserve food and medicines and in air-conditioning. The paper presents the advantages and disadvantages as well as the evolution of the technology of adsorptive refrigeration systems. The methods of improving of adsorption refrigeration systems through improvements in adsorbents properties, use of advanced cycles and hybrid systems is also presented. Possible applications and perspectives for development of adsorption cooling systems are also analyzed. The paper describes a test stand of the adsorption-desorption refrigeration. The present investigations have been carried out utilizing the activated carbon granules as an adsorbent and methanol as an adsorbate. The paper demonstrates the measurement of temperature changes in the adsorbent bed and condenser during adsorption-desorption cycles.

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“…These studies have revealed the importance of heat and mass recovery that increases the coefficient of performance (COP), by developing appropriate models which compare favourably with experiments. Within this context, Akahira et al (2004) proposed a clever new strategy for mass recovery in conventional two-bed adsorption chillers. During the mass recovery process, hot water is supplied to the desorber while the adsorber is continuously supplied with cooling water; the additional heating and cooling accelerates the desorption/adsorption process, enhancing mass circulation and providing better cooling output.…”

Section: Introductionmentioning

confidence: 99%

Computational study of a novel continuous solar adsorption chiller: performance prediction and adsorbent selection

Voyiatzis

Stefanakis

Palyvos

et al. 2007

Int. J. Energy Res.

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SUMMARYA novel solar adsorption chiller intended for domestic use is presented. The chiller can be integrated with existing solar systems based on flat plate collectors, and, contrary to commercial chillers, it operates continuously. A detailed analysis of both the simple and the heat-integrated cycle is carried out so as to select the optimal adsorbent and operating conditions. The employed integral thermodynamic model takes into account the inert masses that limit the performance of the chiller, such as the metal frame, the thermofluid, and the non-adsorbed steam, by introducing heat capacity effects. Given the adsorption equilibrium data, the energy balances, the performance, and the useful thermal loads of the system can be calculated at any operating conditions. The results indicate that silica gel Type A is a more efficient adsorbent compared to silica gel Type RD or Type 3A. Furthermore, the total porosity has a slight effect on system performance, while optimal operation can be achieved when the condenser temperature is less than 326 K and the evaporator temperature greater than 280 K.

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Mass recovery adsorption refrigeration cycle—improving cooling capacity

Cited by 120 publications

References 12 publications

Evaluation of the performance of solid sorption refrigeration systems using carbon dioxide as refrigerant

Evaluation of the performance of solid sorption refrigeration systems using carbon dioxide as refrigerant

The cooling effect by adsorption-desorption cycles

Computational study of a novel continuous solar adsorption chiller: performance prediction and adsorbent selection

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