Proposal and month-wise performance evaluation of a novel dual-mode evaporative cooler

Kashyap, Sarvesh; Sarkar, Jahar; Kumar, Amitesh

doi:10.1007/s00231-019-02670-6

Cited by 11 publications

(9 citation statements)

References 22 publications

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“…13 Conservation equations are written according to the flow direction. The x coordinate is taken in an upward direction 3 for numerical modeling. Some assumptions are used to simplify and develop the model:(i) The outer walls of the evaporative cooler are assumed to be adiabatic by considering proper insulation, so there is only heat exchange inside the device.(ii) The airflow inside both channels is considered laminar as the flow rate is taken as very small (high velocity is not desirable).(iii) The gap between the two channels is very small and the gap to width ratio is very less, so it is treated as a 1D problem.…”

Section: Numerical Model and Simulationmentioning

confidence: 99%

“…Some assumptions are used to simplify and develop the model:(i) The outer walls of the evaporative cooler are assumed to be adiabatic by considering proper insulation, so there is only heat exchange inside the device.(ii) The airflow inside both channels is considered laminar as the flow rate is taken as very small (high velocity is not desirable).(iii) The gap between the two channels is very small and the gap to width ratio is very less, so it is treated as a 1D problem. 3 (iv) Airflow inside the dry and wet channel is assumed to be incompressible and steady.(v) Thermal and physical properties of water vapor and flowing air are assumed to be temperature-dependent.(vi) Properties of water are temperature-dependent and there is no axial conduction in water film.…”

Section: Numerical Model and Simulationmentioning

confidence: 99%

“…(iii) The gap between the two channels is very small and the gap to width ratio is very less, so it is treated as a 1D problem. 3…”

Section: Numerical Model and Simulationmentioning

confidence: 99%

“…However, it has a disadvantage of low cooling energy produced as compared to DEC. To trade-off between suitability and running cost of these coolers with seasonal climate variation, the present authors have recently proposed a dual-mode evaporative cooler, which can operate as DEC as well as REC as per requirement. 3…”

Section: Introductionmentioning

confidence: 99%

“…17 For hot zones, DEC is the proven technology for dry seasons and REC is a better option for humid seasons. Hence, to abstain from the use of two coolers for the same purpose, a dual-mode evaporative cooler is already proposed 3 that can operate in dual mode (direct as well as a regenerative indirect mode). However, further detailed analysis of this novel device is required for various world climate zones (cities) for global acceptability.…”

Section: Introductionmentioning

confidence: 99%

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Energy, exergy and economic assessments of the dual-mode evaporative cooler for various international climate zones

Kashyap

Sarkar

Kumar

2021

Building Services Engineering Research and Technology

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The conventional desert cooler is effective for dry seasons and the regenerative evaporative cooler (REC) is an effective device for humid seasons in composite climate zones. Hence, the dual-mode evaporative cooler (a two-in-one device) is an intelligent choice for air conditioning, which can operate in both direct and regenerative modes depending on the seasonal climatic condition. The exergy and economic analyses of this novel device for global climatic conditions are performed to check the suitability in different regions of the world. An experimental prototype of a dual-mode evaporative cooler is developed and tested to validate the simulation model. The effectiveness, coefficient of performance, exergy destruction, exergy efficiency, operating cost, and specific total cost (STC) are evaluated for both (direct and regenerative) modes of operation. The annual and month-wise performances of dual-mode evaporative cooler have been assessed for five cities of international climate zones. The operating cost of both modes is compared by considering electricity charges in different countries. The dual-mode device is compared with the single-mode device as well. The specific cost is similar for both modes in most of the ASHRAE climatic zones. The present study reveals that significant energy and cost savings are possible by using the dual-mode evaporative cooler. Practical application: This article considers the application of a dual-mode evaporative cooler (direct as well as regenerative mode) in different climate zones and, through investigating the exergy and economic performances, allows designers and operators to understand the potential benefits of employing various operating modes in particular climates.

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