An integrated A/C and HDH water desalination system assisted by solar energy: Transient analysis and economical study

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

doi:10.1016/j.applthermaleng.2016.08.026

Cited by 86 publications

(18 citation statements)

References 32 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%

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%

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

2019

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“…Meteorological data of Jeddah, KSA on 21 July are used to calculate the hourly total solar radiation on solar collectors ( I ) as the sum of direct, diffused and reflected radiations. The technique and complete calculation for obtaining I T for Jeddah is given in Fouda et al 14 :

I ((), normalW / m^{2}) = 10602.89 ‐ 4332.31 τ + 614.44 τ^{2} ‐ 34.45 τ^{3} + 0.66 τ^{4},

where τ is the hours of day measured from 7:0.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…OCP expresses the cost of energy consumed to produce 1 kg/h of fresh water and is defined by

OCP = \frac{COE \times Q_{t}^{•}}{m_{w, fresh}^{•} ((), kg / normalh)} .

where, the unit cost of electricity (COE) is taken 0.05 $/kWh 14 …”

Section: Mathematical Modelmentioning

confidence: 99%

“…It was reported that the RH of air drops from 50.0% to 10.0% in the air heater and increased from 10.0% to 55.0% in the humidifier. Several researches combined the air conditioning and refrigeration systems with HDH water desalination systems in different configuration to obtain hybrid system for cooling and air conditioning systems 12‐16 . The effects of system configurations, the operating conditions and geometric parameters were investigated in these studies.…”

Section: Introductionmentioning

confidence: 99%

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Augmentation of solar‐assisted humidification‐dehumidification water desalination system using heat recovery and thermal energy storage system

et al. 2020

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Summary In previous investigations, humidification‐dehumidification (HDH) solar‐assisted desalination systems were designed produce the daily fresh water during sun hours which lead to big sizes and unsteady systems. In the present study, integration of solar‐assisted HDH desalination system with heat recovery and thermal energy storage unit is developed to enhance system productivity, reduces auxiliary power consumptions and system size and assure system continuous operation. The mathematical modelling based on energy and mass conservation equations is presented and solved using iterative techniques by C++ and engineering equation solver software. Detailed parametric study of the developed system is conducted for wide ranges of operating conditions and design parameters to study the effects of integrating the HDH system with solar collectors, heat recovery and thermal energy storage units on the system performance. The results revealed that (i) this integration improves system productivity and reduces operating cost, (ii) increasing air to water mass ratio and sea water temperature and decreasing ambient humidity decrease water productivity and gained output ratio (GOR) and increase operating cost parameter (OCP) and (iii) increasing air inlet temperature and sea water flow rates increase GOR and decrease OCP. Comparison with previous systems showed that the proposed system reduces the electric heating power of the system at solar noon by 37% at MR = 0.5 and gives daily fresh water productivity (123.7 kg/h) two times more than previous systems with comparable OCP (0.099 $/kg).

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“…El diseño por método numérico es el más efectivo y recomendado ya que parte de un diseño intuitivo el cual, por medio de cálculos, determina la configuración óptima (García,2016;Dhiaa Halboot Muhsen et al, 2016;Muhsen, Ghazali, Khatib, Abed, y Natsheh, 2016). Otro punto importante en la selección del sistema fotovoltaico es el factor económico, ya que es muy importante seleccionar la configuración más económica que satisfaga la necesidad de energía que se va a suplir con el sistema PV (Fouda, Nada y Elattar, 2016;Valer et al, 2016). El gran desarrollo computacional y la tecnología han permitido realizar avances importantes en el diseño de sistemas fotovoltaicos con la ayuda del sistema de métodos numéricos, ya que itera muchas opciones las cuales son posibles soluciones al problema, y permite escoger la más óptima (García, 2016;Cao et al, 2017).…”

Section: Diseño De Sistemas Pvunclassified

Propuesta de diseño de un sistema de energía solar fotovoltaica. Caso de aplicación en la ciudad de Bogotá

Salamanca-Avila¹

2017

Rev. Cient.

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La energía solar es un recurso renovable, es decir, está siempre disponible, no se agota y se puede aprovechar en cualquier momento gracias a que es posible almacenarla. Las difíciles condiciones medioambientales, la contaminación y, de otro lado, el avance tecnológico en el desarrollo de celdas solares cada vez más eficientes, han contribuido a que en la actualidad se promueva el uso de las energías renovables como la energía solar. Adicionalmente, se ha incrementado el uso de estos sistemas pues el nivel de contaminación que produce es muy bajo y los costos de instalación se recuperan al reducir la facturación del consumo de energía prestado por empresas de servicios públicos. Por lo tanto, el uso de sistemas fotovoltaicos es un tema de mucho interés en la actualidad e implementar este tipo de sistemas aislados en la ciudad de Bogotá es posible.

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An integrated A/C and HDH water desalination system assisted by solar energy: Transient analysis and economical study

Cited by 86 publications

References 32 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

Augmentation of solar‐assisted humidification‐dehumidification water desalination system using heat recovery and thermal energy storage system

Propuesta de diseño de un sistema de energía solar fotovoltaica. Caso de aplicación en la ciudad de Bogotá

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