Square wave analysis of the solid-vapor adsorption heat pump

Shelton, Sam V.; Wepfer, William J.; Miles, Daniel J.

doi:10.1016/0890-4332(89)90007-0

Cited by 70 publications

(12 citation statements)

References 5 publications

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“…With respect to the low thermal conductivity of the bed, the adsorbent/fluid heat exchanger can be constructed in such a way that the heat transfer resistance from the fluid to the adsorbent is smaller than the resistance along the path of the fluid. Under these conditions a temperature front is formed in the fluid and in the adsorbent bed, and this wave moves slowly across the bed length [1] (Fig. 2).…”

Section: Description Of the Desalination-plant And Its Principlementioning

confidence: 98%

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A solar adsorption desalination device: first simulation results

Zejli¹,

Benchrifa²,

Bennouna³

et al. 2004

Desalination

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Section: Description Of the Desalination-plant And Its Principlementioning

confidence: 98%

“…The heat balance between the sensible heat of the water stream, flowing at a mass flow rate Me and the latent heat needed for generating water vapor at a mass flow MDF is: (1) from which one concludes:…”

Section: Description Of the Desalination-plant And Its Principlementioning

confidence: 99%

A solar adsorption desalination device: first simulation results

Zejli¹,

Benchrifa²,

Bennouna³

et al. 2004

Desalination

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“…However, the thermal wave length is long due to poor heat transfer in the bed. Thermal wave length is a key factor for a thermal wave adsorption cooling cycle to obtain high heat regeneration between the beds of the cycles [20,21]. High heat regeneration between the beds provides high performance.…”

Section: Resultsmentioning

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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“…Several different structural forms of adsorbers (Wang et al, 1998) (like shell and fin-tube type, plate-fin type and spiral plate type) were adopted to intensify the heat transfer performance by extending heat transfer surface. Meanwhile, a number of advanced adsorption refrigeration cycles (Akahira et al, 2004;Douss et al, 1988;Pons, 1997;Shelton et al, 1989;Shelton et al, 1990;Taylan et al, 2012;Wang, 2001) (like heat recovery cycle, thermal wave cycle, mass recovery cycle, etc.) were proposed and studied.…”

mentioning

confidence: 99%