Simulation of a regenerative, closed-cycle adsorption cooling/heating system

Hajji, A.; Worek, William M.

doi:10.1016/0360-5442(91)90035-k

Cited by 37 publications

(8 citation statements)

References 3 publications

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“…Miles and Shelton (1991) developed a transient two-dimensional heat transfer model to evaluate the performance of closed-cycle adsorbent heat pump systems. Hajji and Worek (1990) and Hajji et al (1989) analyzed a zeolite-water two-container heat pump system using a transient, one-dimensional convection heat and mass transfer model. Meunier (1986) analyzed an adsorber using a heat and mass transfer model.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Effect of Design and Operating Parameters on the Performance of Two-Bed Sorption Heat Pump Systems

Zheng

Worek

Nowakowski

1995

Journal of Energy Resources Technology

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The effect of design and operating parameters on the performance of closed-cycle, twobed sorption heat pump systems were investigated. The parameters studied in this paper included the effects of bed switching frequency (i.e., the switching speed), the sorbent bed NTU, the thermal resistance within the sorbent, the contact resistance between the sorbent and the tube wall of the heat transfer fluid, the fraction of inert mass within the sorbent bed heat exchanger, and the amount of fluid resident within the heat exchanger. The results show that the performance of a sorption heat pump system is extremely sensitive to the switching speed. In fact, the value of the switching speed that optimizes the COP is different from the value that optimizes the overall cooling capacity. Such a performance characteristic allows the design ofmultispeed sorbent bed heat pumps to be operated in such a way to follow the load while still maximizing the system COP. However, operation of the system at switching speeds away from the optimum values can cause a dramatic deterioration in system performance.

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Section: Introduction and Literature Reviewmentioning

confidence: 99%

Effect of Design and Operating Parameters on the Performance of Two-Bed Sorption Heat Pump Systems

Zheng

Worek

Nowakowski

1995

Journal of Energy Resources Technology

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“…The study of the influence of cycle time and switching frequency on adsorption chiller performance has been initiated by Worek and coworkers [5,6], who proposed a model considering only the convection term for heat flow, and Ben Amar et al [7], who studied the case of a temperature-wave regenerative adsorption cooling cycle. Yang et al [8] designed a compact adsorption chiller.…”

Section: Introductionmentioning

confidence: 99%

Heat-exchanger design and switching-frequency effects on the performance of a continuous type solar adsorption chiller

2008

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“…Douss et al adopted the lumped parameter method to simulate the absorption refrigeration system [7]. Hajji and Worek simulated the heat and mass transfer process in the adsorbent bed [8]. Chen Jiangping et al and El‐Sharkawy et al have done some experiments about the adsorption performance of active carbon–ethanol [9, 10].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis and performance study for adsorption refrigeration cycle driven by a fuel cell electric vehicle waste heat

Yang

2010

Heat Trans. Asian Res.

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Three kinds of adsorption refrigeration cycles are analyzed in this paper, a two-bed continuous cycle, an adiabatic mass recovery cycle, and an isothermal mass recovery cycle.Operating parameters (including desorption temperature, adsorption temperature, cycle adsorption rate, COP, and period refrigerating capacity) with the change of the evaporating temperature, condensing temperature, heat capacity ratio, and heat resource temperature are discussed. The analysis indicates that performance differences between the mass recovery cycle and the two-bed continuous cycle are reduced with an increasing of evaporating temperature and heat source temperature. By increasing the heat capacity ratio, COP values for the three kinds of cycle decrease. When the heat source temperature is between 70 and 90 °C, the performance of the isothermal mass recovery cycle is best. Through study, this paper puts forward that the isothermal mass recovery cycle is the best cycle for adsorption refrigeration systems driven by fuel cell electrical vehicle waste heat.

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Simulation of a regenerative, closed-cycle adsorption cooling/heating system

Cited by 37 publications

References 3 publications

Effect of Design and Operating Parameters on the Performance of Two-Bed Sorption Heat Pump Systems

Effect of Design and Operating Parameters on the Performance of Two-Bed Sorption Heat Pump Systems

Heat-exchanger design and switching-frequency effects on the performance of a continuous type solar adsorption chiller

Thermodynamic analysis and performance study for adsorption refrigeration cycle driven by a fuel cell electric vehicle waste heat

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