Numerical Simulation of a Two-bed Solar-driven Adsorption Chiller in a Tropical Climate

Lemington,; Alhamid, Muhammad Idrus

doi:10.14716/ijtech.v6i4.1333

Cited by 14 publications

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“…The adsorption chiller uses solar energy as a heat input. The solar energy equation is expressed as [9] =…”

Section: Adsorption and Desorption Processmentioning

confidence: 99%

Study of Solar Driven Adsorption Cooling Potential in Indonesia

Lemington¹

2017

Journal of Thermal Engineering

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Indonesia has a big potential in utilizing solar energy. In fact, tropical area like Indonesia has a quite stable solar radiation. This paper presented a study using simulation to investigate the performance of solar driven two bed adsorption chiller based on Indonesia climate. Climatic data of several cities in Indonesia is being used. The chiller is being mathematically modeled and calculated numerically using MATLAB®. The simulation is run transiently at working hours to achieve temperature in some points in the system. Moreover, additional PCM is also added to the hot water tank in order to achieve a better performance. The results demonstrated the running characteristic of the chiller with the range of COP 0.043-0.342. In general, the chiller performance can reach COP 0.282 with 17 kW cooling capacity when utilize the solar radiation varies between some cities as input energy. Moreover, Adding PCM in hot water tank also can improve the chiller's performance. Since the amount of heat is essential to the performance of the adsorption chiller, it is better to pre-heat the water before using. By pre-heating and getting the water to a higher temperature, it will generate a higher cooling power needed to meet demand which can be sustained and stable throughout the use of adsorption chiller.

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“…The adsorption chiller uses solar energy as a heat input. The solar energy equation is expressed as [9] =…”

Section: Adsorption and Desorption Processmentioning

confidence: 99%

Study of Solar Driven Adsorption Cooling Potential in Indonesia

Lemington¹

2017

Journal of Thermal Engineering

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“…The equations used in the adsorption and desorption process of the adsorption chiller are adopted from Nasruddin et al (2015). At the beginning of the process, the adsorbent should be heated to begin the desorbing process.…”

Section: Adsorption and Desorption Processmentioning

confidence: 99%

The Effect of Zeolite Adsorbent Granular Size on Solar Adsorption Chiller for Universitas Indonesia Area

Nasruddin¹,

Alamsyah²,

Ericsson³

2016

IJTech

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Cooling systems in tropical countries consume a large portion of the overall energy usage in a building, especially in tropical climates, where there is an especially high demand on cooling systems throughout the year. This paper presents a simulation of the effect of zeolite adsorbent granular size on a zeolite-water solar adsorption chiller for Universitas Indonesia. The adsorption chiller is being mathematically modeled and calculated numerically, using MATLAB®. The mathematical modeling is based on heat transfer principles inside the system for the water inlet and outlet of the system. The adsorption chiller is based on the most recent chiller developed by Shanghai Jiao Tong University (SJTU). The simulation results generally demonstrated the running characteristics of the chiller under a range of different values of granular size. The average granular sizes used in the simulation ranged from 0.5 mm to 1.5 mm. Furthermore, the simulation results showed in detail that the smaller the average granular size of zeolites, the faster the time needed to reach the maximum hot water temperature and the balance state of chilled water outlet temperature.

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“…Nasruddin et al [7] modelled and simulated a two-bed silica gel-water adsorption chiller with heat and mass recovery processes, utilizing solar energy based in the tropical climate of Indonesia. It is shown that during the maximum and minimum value of irradiation, the average value of COP can reach 0.26 and 0.15.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Fin Pitch Distance Variation of Adsorber for Adsorption Chiller Performance

Nasruddin¹,

Kurniawan²,

Rahmat³

2020

REPQJ

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The purpose of this study was to study the performance of silica gel-air adsorption chiller on two types of adsorber fins by conducting experiments at several cycle times, namely 500, 600, 700 and 800 seconds with specific mass recovery times, heat recovery times, and also variations on the input of the cooling fluid, so that optimal cycle times can be obtained related to COP and SCP. The adsorber fin-spacing which has more tightly fin distance does not determine the better performance of the adsorber for chiller application because the shorter distance of the fin, the cross-sectional area of the silica gel surface that has initial contact with the adsorbate will decrease so that the performance of the adsorber will decrease. The highest cooling capacity and COP obtained are 3.1 kW and 0.52, respectively. The results are obtained on adsorber with 3 mm fin distance and 700 s cycle with hot water inlet temperature of 79°C, cooling water inlet temperature of 29.4°C and chilled water outlet temperatures of 8.5°C

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Numerical Simulation of a Two-bed Solar-driven Adsorption Chiller in a Tropical Climate

Cited by 14 publications

References 0 publications

Study of Solar Driven Adsorption Cooling Potential in Indonesia

Study of Solar Driven Adsorption Cooling Potential in Indonesia

The Effect of Zeolite Adsorbent Granular Size on Solar Adsorption Chiller for Universitas Indonesia Area

Experimental Analysis of Fin Pitch Distance Variation of Adsorber for Adsorption Chiller Performance

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