Studying the performance of an improved dew-point evaporative design for cooling application

Cui, Xin; Chua, K.J.; Yang, Wenbo; Ng, Kim Choon; Thu, Kyaw; Nguyen, Vinh Tan

doi:10.1016/j.applthermaleng.2013.11.070

Cited by 62 publications

(27 citation statements)

References 20 publications

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“…Due to small thickness of the sheets, the effects of thickness and porosity are negligible [39]. 4. The height of the working air channels is equal to the height of the product air channels [2,7,8,15,[31][32][33][34][35][36][37].…”

Section: Assumptionsmentioning

confidence: 99%

“…This system consists of two major parts: the first part is a liquid desiccant device for removing moisture in the dehumidifier, and the second part is the indirect evaporative air cooling system for removing sensible heat. Both parts have been enhanced in recent years by the usage of the fully efficient liquid desiccants, lowering energy consumption, regenerating the desiccant with low quality energy sources (waste heat or solarenergy [3]), and also employing a portion of cooled air, or return air, as the working fluid for the second part [4][5][6]. 4 …”

Section: Introductionmentioning

confidence: 99%

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A novel approach using predictive models for performance analysis of desiccant enhanced evaporative cooling systems

Sohani

Sayyaadi

Balyani

et al. 2016

Applied Thermal Engineering

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Section: Assumptionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel approach using predictive models for performance analysis of desiccant enhanced evaporative cooling systems

Sohani

Sayyaadi

Balyani

et al. 2016

Applied Thermal Engineering

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“…Cui et al [13] theoretically investigated the performance of a novel dew-point evaporative cooler. The evaporative cooler, based on a counter-flow closed-loop configuration, is able to cool air to temperature below ambient wet bulb temperature and approaching dew-point temperature.…”

Section: Introductionmentioning

confidence: 99%

Parametric analysis of a combined dew point evaporative-vapour compression based air conditioning system

Chauhan

Rajput

2016

Alexandria Engineering Journal

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A dew point evaporative-vapour compression based combined air conditioning system for providing good human comfort conditions at a low cost has been proposed in this paper. The proposed system has been parametrically analysed for a wide range of ambient temperatures and specific humidity under some reasonable assumptions. The proposed system has also been compared from the conventional vapour compression air conditioner on the basis of cooling load on the cooling coil working on 100% fresh air assumption. The saving of cooling load on the coil was found to be maximum with a value of 60.93% at 46°C and 6 g/kg specific humidity, while it was negative for very high humidity of ambient air, which indicates that proposed system is applicable for dry and moderate humid conditions but not for very humid conditions. The system is working well with an average net monthly power saving of 192.31 kW h for hot and dry conditions and 124.38 kW h for hot and moderate humid conditions. Therefore it could be a better alternative for dry and moderate humid climate with a payback period of 7.2 years. Ó 2016 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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“…Generally, the dew point saturation efficiency can be between 55 -85%, however, the wet-bulb efficiency (based on the wet-bulb temperature) can be as 20 The DPEC has been studied by several researchers [98,109,110]. Zhan [111] found that for optimum performance, the optimum flow rate ratio of working-to-product air was about 50%, and the dimensionless channel length (ratio of channel length to height) should be between 100 to 300.…”

Section: Indirect Evaporative Coolersmentioning

confidence: 99%

Solar pond powered liquid desiccant evaporative cooling

Elsarrag

Igobo

Alhorr

et al. 2016

Renewable and Sustainable Energy Reviews

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Liquid desiccant cooling systems (LDCS) are energy efficient means of providing cooling, especially when powered by low-grade thermal sources. In this paper, the underlying principles of operation of desiccant cooling systems are examined, and the main components (dehumidifier, evaporative cooler and regenerator) of the LDCS are reviewed. The evaporative cooler can take the form of direct, indirect or semi-indirect. Relative to the direct type, the indirect type is generally less effective. Nonetheless, a certain variant of the indirect type -namely dew-point evaporative cooler -is found to be the most effective amongst all. The dehumidifier and the regenerator can be of the same type of equipment: packed tower and falling film are popular choices, especially when fitted with an internal heat exchanger. The energy requirement of the regenerator can be supplied from solar thermal collectors, of which a solar pond is an interesting option especially when a large scale or storage capability is desired.

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Studying the performance of an improved dew-point evaporative design for cooling application

Cited by 62 publications

References 20 publications

A novel approach using predictive models for performance analysis of desiccant enhanced evaporative cooling systems

A novel approach using predictive models for performance analysis of desiccant enhanced evaporative cooling systems

Parametric analysis of a combined dew point evaporative-vapour compression based air conditioning system

Solar pond powered liquid desiccant evaporative cooling

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