Thermodynamic analysis of single-stage and multi-stage adsorption refrigeration cycles with activated carbon–ammonia working pair

Xu, S.Z.; Wang, L.W.; Wang, R.Z.

doi:10.1016/j.enconman.2016.03.010

Cited by 41 publications

(13 citation statements)

References 20 publications

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“…On decreasing the temperature of the water returning from recooler it is affected only indirectly taking into account the efficiency of the heat exchanger (Wang et al 2011;Xu et al 2016).…”

Section: Fig 3 Experiments Results For Adsorption Refrigeration Unitmentioning

confidence: 99%

Influence of Outside Temperature on the Operation of the Adsorption Chiller

Grzebielec

Laskowski

Ruciński

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. Adsorption refrigeration systems are characterized by a lower coefficient of performance than the compressor type device or even absorption, but can utilize waste heat at lower temperature. The aim of the study was to determine which external parameter has the greatest impact on the efficiency of the adsorption device. As a result of experimental studies there was found that this is not the temperature of the feed but particularly the temperature of external air. For this reason, it is recommended that the adsorption device should cooperate with evaporative spray coolers, instead of with popular dry coolers. This solution will increase annual efficiency of adsorption unit approx. by 25% and significantly reduce the costs of cold generation.

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“…On decreasing the temperature of the water returning from recooler it is affected only indirectly taking into account the efficiency of the heat exchanger (Wang et al 2011;Xu et al 2016).…”

Section: Fig 3 Experiments Results For Adsorption Refrigeration Unitmentioning

confidence: 99%

Influence of Outside Temperature on the Operation of the Adsorption Chiller

Grzebielec

Laskowski

Ruciński

2017

Proccedings of 10th International Conference "Environmental Engineering"

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“…Adsorptive heat transformation (AHT) is an energy-saving and environmentally friendly technology that is attracting increasing attention due to its ability to effectively convert and store waste or renewable heat [1][2][3]. The adsorption cooling [4], deep freezing [5], ice production [6], air conditioning [7], heat pumping and storage [8] have attracted a lot of research in recent decades. Nowadays, several adsorptive chillers and heat pumps are available on the market [2,9].…”

Section: Introductionmentioning

confidence: 99%

A Double-Bed Adsorptive Heat Transformer for Upgrading Ambient Heat: Design and First Tests

Tokarev

2019

Energies

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A full scale lab prototype of an adsorptive heat transformer (AHT), consisting of two adsorbers, an evaporator, and a condenser, was designed and tested in subsequent cycles of heat upgrading. The composite LiCl/SiO 2 was used as an adsorbent with methanol as an adsorbtive substance under boundary temperatures of T L /T M /T H = −30/20/30 • C. Preliminary experiments demonstrated the feasibility of the tested AHT in continuous heat generation, with specific power output of 520 W/kg over 1-1.5 h steady-state cycling. The formal and experimental thermal efficiency of the tested rig were found to be 0.5 and 0.44, respectively. Although the low potential heat to be upgraded was available for free from a natural source, the electric efficiency of the prototype was found to be as high as 4.4, which demonstrates the promising potential of the "heat from cold" concept. Recommendations for further improvements are also outlined and discussed in this paper.

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“…Common adsorbents, which have been studied in adsorption cooling applications: zeolite, silica-gel, and activated-carbon [1][2][3][4][5][6][7]. The activated carbon has been used with different refrigerants for low-temperature applications [8] for example activated-carbon/methanol [9,10], activatedcarbon/ammonia [11,12], activated-carbon/ethanol [13,14], activated-carbon/ /HFO-1234ze(E) [15]. During this work we are interested to the production of cold by adsorption using activated carbon / CO2 pair.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Cold Production Using Activated Carbon/CO2 Pair

Jrad¹,

Zagnani²,

Mhimid³

et al. 2019

IJHT

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The use of CO2 for adsorption cooling system is attractive and interesting. the production of solar cooling adsorption using activated carbon possesses many advantages: nontoxic and nonflammable natural refrigerant, with zero ozone depleting potentiel, negligible global warming potentiel for refrigeration and operating with solar thermal energy. A computer program written in Fortran language has been developed to provide us with the time-space evolution of temperature and average fluid content and to optimize the heat and mass transfers performance using activated-carbon/CO2 pair in Monastir city (Tunisia) during sorption phenomena. The main numerical results showed that activated carbon / methanol pair is more efficient than activated carbon / CO2 pair. COPs is less than 0.206 and 0.098 for activated-carbon/methanol and activated-carbon/CO2 pairs, respectively. The temperature is strongly related to mass desorbed. So, to improve the solar coefficient of performance COPs, it is necessary to have a large evaporation temperature and a low condensation temperature.

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Thermodynamic analysis of single-stage and multi-stage adsorption refrigeration cycles with activated carbon–ammonia working pair

Cited by 41 publications

References 20 publications

Influence of Outside Temperature on the Operation of the Adsorption Chiller

Influence of Outside Temperature on the Operation of the Adsorption Chiller

A Double-Bed Adsorptive Heat Transformer for Upgrading Ambient Heat: Design and First Tests

Feasibility Study of Cold Production Using Activated Carbon/CO2 Pair

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