Performance analysis of proposed hybrid air conditioning and humidification–dehumidification systems for energy saving and water production in hot and dry climatic regions

Nada, S.A.; Elattar, H.F.; Fouda, A.

doi:10.1016/j.enconman.2015.02.082

Cited by 80 publications

(19 citation statements)

References 33 publications

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“…As shown in Table , the COP of the current system has no big difference with those of the comparable systems; in addition, the water productivity of the current system is much higher than that presented by Nada et al and Fouda et al and has approximately similar value with Nada et al and less than the system of Elattar et al This can be attributed to that the systems proposed by Nada et al are differed in operating conditions and the systems' COPs are calculated based on the refrigeration capacity ( Q • ref ) rather than room cooling load ( Q • R ). In addition, the current system COP is closer to those of Fouda et al and Elattar et al; this is due to the difference in operating conditions of the comparable systems (RSHF = 0.9) and current system (RSHF = 0.6); moreover, the nature of the current deep cooling system consumes more energy for operation and in turn leads to lower COP.…”

Section: Resultsmentioning

confidence: 57%

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Energy‐efficient hybrid A/C and freshwater production system proposed for high latent load spaces

2019

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Summary Huge amount of energies is consumed by the air conditioning (A/C) to maintain the required temperature and humidity inside spaces/applications of high humidly. An innovative A/C system that recovers the condenser heat in process air reheating and other useful thermal utilization is presented and investigated in this paper. For high coefficient of performance (COP) of the AC and more energy‐efficient system, the cold exhaust air rejected by the air condition system is also utilized to cool the condenser of the AC system. Huge amount of the water condensate from the system is also utilized as freshwater production. Performance of the proposed system is analytically investigated for different operating conditions and system capacities. Mathematical model of the systems is developed and solved numerically using Engineering Equation Solver (EES) software. Results show that the proposed system enhances the COP and decreases the electric power consumption. The saving in electric power consumption, COP, and the freshwater production rate of the system increases with decreasing room‐sensible heat factor, fresh air ratio, and outdoor air temperature and humidity. Moreover, the COP of the proposed system is 90% higher than COP of the basis system, and the savings in the running cost of the system increase by 4.5 times with decreasing the room‐sensible heat factor (RSHF) from 0.6 to 0.2. In addition, the highest COP attained by the proposed system is 2.72, and the corresponding freshwater production rate is 373.8 kg/h.

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Section: Resultsmentioning

confidence: 57%

“…The electricity unit rate differs from a city to another. In this study, typical values of electricity unit rate 0.05$/kWh of Gulf cities is considered.…”

Section: Thermodynamic Analysis and Mathematical Modelingmentioning

confidence: 57%

Energy‐efficient hybrid A/C and freshwater production system proposed for high latent load spaces

2019

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“…Nada et al [1] theoretical investigated the performance of proposed integrative airconditioning (A/C) and humidification-dehumidification desalination (HDD) systems for the purpose of energy saving of the air conditioning system and at the same time utilizing the system in fresh water production for the large capacity air conditioning systems .Cianfrini et al [2] proposed an integrated energy-recovery system basically consisting of an indirect evaporative cooling equipment combined with a cooling/reheating unit to reduce the energy demand of airconditioning installations. Wang et al [3] investigated the Coefficient of Performance (COP)'s augmentation of an air conditioning system utilizing an evaporative cooling condenser.…”

Section: Introductionmentioning

confidence: 98%

Thermodynamic analysis of the evaporative-vapour compression based combined air conditioning system for hot and dry climatic conditions

Chauhan

Rajput

2015

Journal of Building Engineering

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“…A mathematical model for direct evaporative cooling system has been developed and presented the experimental results of the tests performed in a direct evaporative cooler which took place in the air conditioning laboratory at the University of Taubate Mechanical Engineering Department, Brazil. Nada et al [19] theoretically investigated the performance of proposed integrative air-conditioning (A/C) and hu midification-dehumidification desalination (HDD) systems for the purpose of energy saving of the air conditioning system and at the same time utilizing the system in fresh water production for the large capacity air conditioning systems. Cianfrini et al [20] proposed an integrated energy-recovery system basically consisting of indirect evaporative cooling equipment combined with a cooling/reheating unit to reduce the energy demand of air-conditioning installations.…”

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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Performance analysis of proposed hybrid air conditioning and humidification–dehumidification systems for energy saving and water production in hot and dry climatic regions

Cited by 80 publications

References 33 publications

Energy‐efficient hybrid A/C and freshwater production system proposed for high latent load spaces

Energy‐efficient hybrid A/C and freshwater production system proposed for high latent load spaces

Thermodynamic analysis of the evaporative-vapour compression based combined air conditioning system for hot and dry climatic conditions

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

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