Performance of Evaporative Condensers

Ettouney, Hisham; El-Dessouky, Hisham; Bouhamra, Walid; Al-Azmi, Bader

doi:10.1080/014576301750215797

Cited by 33 publications

(8 citation statements)

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“…It was observed that the condenser utilizing evaporatively cooled air saved energy up to 20% compared with the same condenser utilizing air at ambient conditions. Correlations for the external heat transfer coefficient and the effectiveness of an evaporative condenser used for condensing superheated water vapour were developed in another study (Ettouney et al, 2001). The performance of the evaporative condenser was also compared with that of the same device operating as an aircooled condenser in this study.…”

Section: Introductionmentioning

confidence: 98%

Performance evaluations of refrigeration systems with air-cooled, water-cooled and evaporative condensers

Hoşöz

Kılıçarslan

2004

Int. J. Energy Res.

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SUMMARYThis paper compares the performance characteristics of refrigeration systems employing three types of condensers, namely the air-cooled, the water-cooled and the evaporative condensers. Experimental studies were conducted in the same vapour-compression refrigeration unit operating with a different condenser in each test. It was found that the system with water-cooled condenser had a higher refrigeration capacity by 2.9-14.4%, and a higher COP by 1.5-10.2% than the one with evaporative condenser. However, the refrigeration capacity and COP of the unit with evaporative condenser were higher than those of the one with air-cooled condenser by 31.0 and 14.3%, respectively.

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Section: Introductionmentioning

confidence: 98%

Performance evaluations of refrigeration systems with air-cooled, water-cooled and evaporative condensers

Hoşöz

Kılıçarslan

2004

Int. J. Energy Res.

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“…The EAC is a heat exchanger that integrates a water-cooled cooler and a cooling tower. It consists of heat exchange coil, axial fan, circulating water pump, spray device and other main components [6]. The main operation principle of the EAC is to use two cooling media, water and air, and use the latent heat of vaporization generated by the evaporation of the water film outside the tube bundle and the sensible heat of forced convection exchange between the tube bundles.…”

Section: System Designmentioning

confidence: 99%

Performance of an internet data center refrigeration system using an evaporative cooler

et al. 2020

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The traditional refrigeration method of internet data center (IDC) is mostly air refrigeration, which has undesired cooling effect and high power consumption. This study addresses this problem and proposes an evaporative air cooler (EAC) suitable for IDC. Given the high specific heat capacity of water, the evaporative condensing coil and spray device are added to the evaporative cooler to enhance the heat transfer effect. Heat and mass transfer mathematical models are established to analyze the heat transfer performance. The mathematical model is used to simulate the profile of the heat and mass transfer coefficient of the EAC with the amount of spray water and air flow. The results show that when the air flow changes from 10 to 20 kg/s, the air equivalent heat transfer coefficient increases by about 41%. When the air flow rate is 20 kg/s and the spray water volume is 0.00124 kg/(mꞏs), the total heat transfer coefficient is increased by about 308% compared with the case without spray water.

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“…The conditions of the moist air at the different states of the above-mentioned processes can be evaluated by a set of algebraic equations as reported by many references [1,12]. The approach presented by reference [1], which uses a set of eight equations that describe the behaviour of all the processes with ten variables, is used.…”

Section: Mathematical Modelmentioning

confidence: 99%

The effectiveness of multi-stage dehumidification—humidification for improving the cooling ability of evaporative air conditioning

Saleh

Al‐Nimr

2008

Proceedings of the Institution of Mechanical Engineers, Part A:

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Evaporative cooling systems are commonly used because of their low initial and running cost. These systems have a great potential to provide thermal comfort in places where humidity is low; however, they are less efficient where air humidity is high. The present work proposes a system that can be used either in dry or humid climates by introducing a new concept: multi-dehumidification-humidification processes that can be coupled with evaporative cooling systems. The effect of this modification on the production of low temperature is investigated. To validate the model, the improvement carried out is quantified by comparing the performance of a classical evaporative cooling system and with the proposed single-step dehumidification-humidification system. It is found that increasing the number of dehumidification-humidification processes greatly reduces the air temperature and improves the performance of the system. In some cases, the reduction in the air temperature exceeds 20 • C in humid climates, a result that is comparable with those obtained by vapour-compression cooling systems. In conclusion, the proposed system delivers the low cost benefits of evaporative cooling systems with the high performance of conventional compression cooling systems.

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Performance of Evaporative Condensers

Cited by 33 publications

References 0 publications

Performance evaluations of refrigeration systems with air-cooled, water-cooled and evaporative condensers

Performance evaluations of refrigeration systems with air-cooled, water-cooled and evaporative condensers

Performance of an internet data center refrigeration system using an evaporative cooler

The effectiveness of multi-stage dehumidification—humidification for improving the cooling ability of evaporative air conditioning

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