Characteristics of FAM-Z01 compared to silica gels in the performance of an adsorption bed

Hong, Seonghun; Ahn, Soyoung; Chung, Jae Dong; Bae, Keum Seok; An, Dong; Kwon, Oh Kyung

doi:10.1016/j.applthermaleng.2016.05.058

Cited by 39 publications

(18 citation statements)

References 28 publications

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“…Given a sufficiently large value of D eq /r p , the non-isobaric model and linear driving force (LDF) model were used for the inter-and intra-particle mass transfer models, respectively. Non-isobaric model (Hong et al [3], Niazmand et al [4], Hong et al [13]):…”

Section: Adsorption Bedmentioning

confidence: 99%

“…To understand the adsorption chiller process in more detail, a number of researchers have been conducting studies, investigating adsorbents [1][2][3], the geometry of the heat exchanger [4][5][6], advanced cycle [7][8][9][10], and operating conditions [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Previous numerical studies [1,3,5,6] covered many interesting issues and practical improvement of adsorption cooling systems. However, there has been no report on the impact of assumption on the evaporator and condenser.…”

Section: Introductionmentioning

confidence: 99%

“…However, there has been no report on the impact of assumption on the evaporator and condenser. The isotherm of the sorbent is a function of pressure and temperature [3]. Thus, the idealized evaporator temperature distorts the evaluation of the system performance.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Evaporator and Condenser in the Analysis of Adsorption Chillers

et al. 2020

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In a survey of the literature from the last 20 years, 20% of the numerical models used to analyze the performance of adsorption chillers assumed the evaporator and condenser were ideal, with a fixed evaporation temperature and condenser temperature, and ignored interactions between the adsorption bed and evaporator/condenser. Even when the interaction with the evaporator and condenser was included, the other 80% of studies modeled the adsorption bed based on the LPM (lumped parameter method), which ignores the geometry effect and contact resistance of the bed, and thus reduces the accuracy of the analysis. As a consequence, these earlier numerical studies overestimated the system performance of the adsorption chiller. In this study, we conducted a refined numerical approach which avoids these limitations, producing estimates in close agreement with experimental results. Compared with our approach, the models with ideal treatment of evaporator and condenser overestimated COP (coefficient of performance) and SCP (specific cooling power) by as much as 16.12% and 24.64%, respectively. The models based on LPM overestimated COP and SCP by 22.82% and 11.28%, compared to our approach.

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Section: Adsorption Bedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Evaporator and Condenser in the Analysis of Adsorption Chillers

et al. 2020

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“…The adsorption chiller is one of the most advanced pieces of equipment that has the potential to collect or upgrade waste heat at lowtemperatures. An adsorption chiller can store waste heat at temperatures less than 353 K and supply cooling energy at levels around 283 K [1]- [3]. Furthermore, the refrigerant used in adsorption chillers is water vapor, which is environment friendly.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Characteristic of Adsorption in a Double-Effect Adsorption Chiller with FAM-Z01

Esaki¹,

Kobayashi²,

Matsuda³

2016

MSCE

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Here, we propose a double-effect adsorption chiller with a zeolite adsorbent (FAM-Z01) for utilization of waste heat. The FAM-Z01 adsorbent has the potential to recover waste heat in low temperatures ranging from 353 to 333 K and shows good potential in the adsorption chiller in terms of the high cooling output. A doubleeffect adsorption chiller could provide a higher Coefficient Of Performance (COP) than that of a single-effect chiller. In this paper, we developed a measuring method for the amount of adsorption in the first and second adsorber in a double-effect adsorption chiller and measured the adsorption and desorption rate based on the volumetric method. We calculated the COP of the adsorption chiller with the quantity of adsorbent obtained in the experiment. In the experiments, the quantity of adsorbent in the first adsorber was 0.14 g-H 2 O/g-Ads at the pressure 20 kPa and a desorption temperature over 100˚C. The amount of adsorbent in the second adsorber was equal to that of the first adsorber. By analyzing the COP with the experimental results, the COP value was calculated to be over 1.0 (−) at any desorption temperature. The COP of the double-effect cycle was higher than that of single-effect cycle.

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Conceptual design of chemical devices

Fung

Wibowo

et al. 2020

J Adv Manuf & Process

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Chemical devices are chemical products that transform a feed stream into an outlet stream with the desired attributes by performing reaction, fluid flow, heating, cooling, and/or separations. They resemble small chemical plants and can be described by device flowsheets, similar to the process flowsheets of chemical plants. This article proposes a generic design framework for chemical devices. It shares some steps with Douglas' hierarchical design procedure for chemical processes but has its own distinguishing features such as capturing of consumer preferences, formulation of an engineering statement, and the use of unconventional processing techniques in device manufacturing. Two examples, domestic dehumidifier and air purifier, are discussed to illustrate the design framework. A new dehumidifier design was found using this framework.

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Characteristics of FAM-Z01 compared to silica gels in the performance of an adsorption bed

Cited by 39 publications

References 28 publications

Effects of Evaporator and Condenser in the Analysis of Adsorption Chillers

Effects of Evaporator and Condenser in the Analysis of Adsorption Chillers

Evaluation of the Characteristic of Adsorption in a Double-Effect Adsorption Chiller with FAM-Z01

Conceptual design of chemical devices

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