Experimental study of air evaporative cooling process using microporous membranes

“…Membranes can be used in Heating, Ventilating and Air-Conditioning system to conduct air treatment processes, for example: humidiﬁcation, liquid desiccant dehumidiﬁcation, vacuum dehumidiﬁcation, EC. 8–14 The advantages of using porous synthetic membranes in the air treatment process include, for example, lack of direct contact between liquid and air, elimination of liquid droplets in the air stream, prevention of both the transmission of microorganisms, bacteria or spores between phases and the contamination of the liquid with airborne dust. 15,16 These advantages are not achievable with some traditional air treatment techniques.…”

Section: Introductionmentioning

confidence: 99%

Use of a membrane module for semi-direct air evaporative cooling

Englart

2019

Indoor and Built Environment

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This study discusses the use of a membrane module for semi-direct evaporative air cooling. A cross-flow membrane module was used to carry out this air treatment process. For such a flow, it was proposed to describe and solve the heat and mass transfer model as a one-dimensional problem. The mathematical model was used to determine the moisture content and air temperature at the outlet from the module and the temperature of the circulating water. Results obtained using the proposed model are in good agreement with the experimental data. The relative error for the air temperature at the module outlet did not exceed 0.5%. For the moisture content, the relative error did not exceed 4%. For the circulating water temperature, the relative error did not exceed 0.6%. This paper also discusses the heating efficiency of the evaporative cooling process. Methods for determining the unit cooling indicator and the energy efficiency ratio are also proposed.

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“…They can also be used in HVAC (heating, ventilation and air conditioning) systems to conduct air treatment processes for example drying, humidifying or evaporative cooling [1][2][3]. The benefits of using membranes in the air treatment process include, for example, lack of direct contact between liquid and air, elimination of liquid droplets in the air stream, prevention of microorganisms, bacteria or spores between phases and prevention of liquid contamination by airborne dust [4,5].…”

Section: Introductionmentioning

confidence: 99%

Comparison heat and mass transfer coefficients in the shell side of the hollow fiber membrane module

Englart

2018

E3S Web Conf.

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Abstract. The article discusses the theory associated with the determination of total heat and mass transfer coefficients in a membrane module. The equations for determining Nusselt and Sherwood numbers on the shell side of the module are presented. The design of the membrane module and the test bench are also discussed. The convective coefficients of heat and mass transfer on the shell side have been determined on the basis of the measurements. Calculation results obtained from correlation equations were then compared with the results of experimental investigations of convective heat and mass transfer coefficients in the airwater system. The equation is indicated appropriate for use in the case analysed.

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Experimental study of air evaporative cooling process using microporous membranes

Cited by 5 publications

References 21 publications

Experimental investigation of air cooler using local palm tree waste

Experimental investigation of air cooler using local palm tree waste

Use of a membrane module for semi-direct air evaporative cooling

Comparison heat and mass transfer coefficients in the shell side of the hollow fiber membrane module

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