Study on heat and mass recovery in adsorption refrigeration cycles

Qu, T.F.; Wang, R.Z.; Wang, W.

doi:10.1016/s1359-4311(00)00050-8

Cited by 76 publications

(25 citation statements)

References 9 publications

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“…Due to the fact that the first stage of adsorption unit operation requires heating one adsorber and a second adsorber has to be cooled the whole device has a high potential of the internal energy recovery (Chekirou et al 2016;Qu et al 2001). Heat and mass recovery The recovery of heat and mass is the most common method used in the adsorption equipment to improve energy efficiency ratio EER (Ruciński et al 2016;Rusowicz et al 2014).…”

Section: Internal Energy Recoverymentioning

confidence: 99%

Energy Recovery Methods in Adsorption Refrigeration Units

Grzebielec

Szelągowski

Ruciński

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. Adsorption refrigeration systems, as opposed to absorption type operate in a cyclic manner. The result is that at the beginning of each process must be fed into the adsorber state in which they will adsorb or desorb a refrigerant. In the case of two adsorbers at the start of a cycle, the one of the adsorber must be refrigerated while the second has to be heated. These processes are causing unnecessary energy loss. The aim of the work is to show how these processes can be connected and the heat received from one adsorber is transported to another adsorber. As part of the study, the heat and mass recovery processes will be considered. It turns out that in the thermal wave type systems, it is possible to recover more than 25% of the energy lost to bring the adsorber to the states in which they will operate efficiently to desorb and adsorb refrigerant. That is, it is possible to improve the efficiency of the adsorption refrigeration unit using the proposed improvements.

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Section: Internal Energy Recoverymentioning

confidence: 99%

Energy Recovery Methods in Adsorption Refrigeration Units

Grzebielec

Szelągowski

Ruciński

2017

Proccedings of 10th International Conference "Environmental Engineering"

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“…( 0, , ) ( 0, , ) ( 0, , ) f t s i (10) Pressure and adsorption capacity in the bed are also initially uniform at condenser pressure (P c ) and maximum adsorption capacity (X o ) respectively:…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

“…Local equilibrium assumption was used and the effects of resistances on heat and mass transfer were neglected to provide the asymptotic maximum performance obtainable from a thermal wave cycle [9]. Qu et al [10] investigated the influence of mass and heat recovery on SCP and COP and results showed that a thermal wave cycle with mass and heat recovery had the highest COP amoung the cycles examined. Taylan et al [11] modeled thermal wave cycles without mass recovery, with adiabatic mass recovery and with isothermal mass recovery.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Heat and Mass Transfer in the Adsorbent Bed of a Thermal Wave Adsorption Cooling Cycle

Çağlar

Yamalı

2013

Comput Thermal Scien

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A coupled heat and mass transfer analysis of the adsorbent bed of a thermal wave adsorption cooling cycle is performed. The adsorbent bed is modeled two dimensionally. Governing equations for energy, mass and momentum transfers are solved by Comsol Multiphysics simultaneously. Variations of temperature, pressure, adsorption capacity, equilibrium adsorption capacity and mass transfer coefficient for a finless tube adsorbent bed are presented with multicolored plots. Desorption process is simulated in the model. Results show that the adsorbent bed reaches the maximum cycle temperature uniformly after 5000s. Uniform pressure assumption can be used in the bed due to small pressure gradient during the process. Adsorption capacity decreases from 26.1% to 8.89% in 5000s. Temperature front progresses along the bed creating a thermal wave. The thermal wave length is needed to be short to enhance the bed effectiveness regenerating more heat between the beds of the thermal wave cycle. It can be concluded that a parametric study is recommended for a future work in order to investigate the effects of design and operational parameters on the dependent variables and thermal wave length.

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“…It has been reported that the fixed beds of porous materials in the adsorption refrigeration cycles tend to be low performance, long cycle time and make the system over-sized due to poor heat and mass transfer rates in the adsorption bed [2].…”

Section: Open Accessmentioning

confidence: 99%

Experimental Investigation of a Three-Bed Adsorption Refrigeration Chiller Employing an Advanced Mass Recovery Cycle

et al. 2009

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Abstract:The performance of an advanced three-bed adsorption chiller with a mass recovery cycle has been experimentally investigated in the present study. The temperature and pressure of various components of the chiller were monitored to observe the dynamic behaviour of the chiller. The performances in terms of the coefficient of performance (COP) and specific cooling power (SCP) were compared with a conventional single stage. The results show that the proposed cycle produces COP and SCP values superior to those of the conventional single stage cycle for heat source temperature below 75 °C.

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Study on heat and mass recovery in adsorption refrigeration cycles

Cited by 76 publications

References 9 publications

Energy Recovery Methods in Adsorption Refrigeration Units

Energy Recovery Methods in Adsorption Refrigeration Units

Analysis of Heat and Mass Transfer in the Adsorbent Bed of a Thermal Wave Adsorption Cooling Cycle

Experimental Investigation of a Three-Bed Adsorption Refrigeration Chiller Employing an Advanced Mass Recovery Cycle

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