Performance enhancement of a solar powered air conditioning system using passive techniques and SWCNT /R-407c nano refrigerant

Rahman, S. M. A.; Issa, Salah; Said, Zafar; Assad, Mamdouh El Haj; Zadeh, Rashed; Barani, Yazan

doi:10.1016/j.csite.2019.100565

Cited by 64 publications

(13 citation statements)

References 19 publications

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“…Nanoparticles have been used to create new refrigerants known as nanorefrigerants which can improve the COP of both the VARS and VCRS and decrease the compression work of the VCRS. Rahman et al [376] analysed the effect of using nanoparticles in a refrigerant. The effect of the nanorefrigerant on the compression work and COP of the air conditioning system is observed.…”

Section: Nanofluids In Refrigerationmentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

243

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The field of nanofluids has received interesting attention since the concept of dispersing nanoscaled particles into a fluid was first introduced in the later part of the twentieth century. This is evident from the increased number of studies related to nanofluids published annually. The increasing attention on nanofluids is primarily due to their enhanced thermophysical properties and their ability to be incorporated into a wide range of thermal applications ranging from enhancing the effectiveness of heat exchangers used in industries to solar energy harvesting for renewable energy production. Owing to the increasing number of studies relating to nanofluids, there is a need for a holistic review of the progress and steps taken in 2019 concerning their application in heat transfer devices. This review takes a retrospective look at the year 2019 by reviewing the progress made in the area of nanofluids preparation and the applications of nanofluids in various heat transfer devices such as solar collectors, heat exchangers, refrigeration systems, radiators, thermal storage systems and electronic cooling. This review aims to update readers on recent progress while also highlighting the challenges and future of nanofluids as the next-generation heat transfer fluids. Finally, a conclusion on the merits and demerits of nanofluids is presented along with recommendations for future studies that would mobilise the rapid commercialisation of nanofluids.

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Section: Nanofluids In Refrigerationmentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

243

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“…In the literature, many valuable scientific researchers have addressed this type of solar concentrators (LFRs), such as Bellos et al [25,41,43,[46][47][48], Roostaee and Ameri [49], Pulido-Iparraguirre et al [50], Marugán-Cruz et al [51], Barbón et al [52,53], Ghodbane et al [2,[4][5][6][7][54][55][56] and Moghimi et al [57,58]. This collection of valuable scientific research collected all that is related to this type of linear Fresnel solar reflectors (LFRs).…”

Section: Linear Fresnel Solar Reflector Subsystemmentioning

confidence: 99%

“…The use of solar energy in sunny countries such as Algeria is an effective way to overcome the lack of energy especially in rural areas where it is sometimes difficult and expensive to feed them with the conventional electricity grid [1,2]. In addition, Algeria is a country where the solar potential is very important; the annual sunshine is always greater than 2×10 4 kJ/m 2 of catchment area [3]. As the tendency to exploit this clean and abundant solar energy in daily living (industrial and household) is a priority and not a choice [2,[4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Solar-Driven Ejector Air Conditioning System Under El-Oued Climatic Conditions, Algeria

Ghodbane

Hussein

2021

Journal of Thermal Engineering

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In order to understand the behavior and to determine the effective operational parameters of a solar-driven ejector air conditioning system at low or medium temperature, a dynamic model depends on the principles of conservation, the momentum mass and energy is developed. For this purpose, the thermodynamic characteristics of the liquid and vapor refrigerant were identified using the Engineering Equation Solver (EES) software. Linear Fresnel solar reflector has been used as a tool to convert solar energy into thermal energy. Water (R718) was used as a refrigerant. The operational conditions for the studied solar-driven ejector air conditioning system are as follows: evaporator temperature "T e =283.15 K", condenser temperature "T c =305.15 K", and generator temperature "T g = 373.15 K". The performance of the ejector air conditioning system was compared as a function of the operating parameters of the subsystem. The average value of thermal efficiency of the Fresnel linear concentrator has reached 31.60 %, the drive ratio "ω" is 0.4934, the performance value of the ejector air conditioning subsystem "COPejc" is 60.664 % and the average value of the thermal performance of the machine "STR" has touched 19.17 %. The results obtained through this scientific subject are stimulating and encouraging, where this technique can be used for air conditioning in desert areas in southern Algeria, where fossil energy (petroleum, gas, etc.) is extracted and produced in various types.

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“…The effect of nano-refrigerants on the performance of air-conditioning systems units has also been investigated 21 . Rahman et al 22 conducted an experimental study on a passive air-conditioning unit coupled with SWCNT/R-407c nano-refrigerants. While the cooling load of the system was decreased by 35% due to the use of trees, double glazed windows and roof reflective materials, the use of the nanoparticles decreased the power consumption of the air-conditioning unit by 202.5 W. Jeyakumar et al 23 , investigated the effect of CuO, Al 2 O 3 and ZnO nanoparticles on the COP of a refrigeration cycle.…”

Section: Introductionmentioning

confidence: 99%

Parametric investigation of a chilled water district cooling unit using mono and hybrid nanofluids

Okonkwo

Al‐Ansari

2021

Sci Rep

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This study presents a novel parametric investigation into the performance of a district cooling system using mono (Al2O3 and TiO2) and hybrid (Al2O3–TiO2) nanoparticles in the base fluids of water and ethylene–glycol water (EG-water) at a 20:80 ratio. The study analyses the effect of variables such as secondary fluid flow rate, evaporator and inlet temperatures, nanoparticle concentration, and air flowrate on the COP, total electrical energy consumption, and design of the district cooling unit. The analysis is performed with a thermal model developed and validated using operations data obtained from the McQuay chilled water HVAC unit operating in one of the facility plants at the Education City campus. The results of the study show that the use of nanofluids increased the overall heat transfer coefficient in the system by 6.6% when using Al2O3–TiO2/water nanofluids. The use of nanofluids in the evaporator also led to an average reduction of 23.3% in the total work input to the system and improved the COP of the system by 21.8%, 20.8% and 21.6% for Al2O3–TiO2/water, Al2O3/water, and TiO2/water nanofluids, respectively. Finally, an enhancement of 21.6% in COP was recorded for Al2O3–TiO2/EG-water nanofluids at a 5% nanoparticle volume concentration.

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Performance enhancement of a solar powered air conditioning system using passive techniques and SWCNT /R-407c nano refrigerant

Cited by 64 publications

References 19 publications

An updated review of nanofluids in various heat transfer devices

An updated review of nanofluids in various heat transfer devices

Performance Analysis of a Solar-Driven Ejector Air Conditioning System Under El-Oued Climatic Conditions, Algeria

Parametric investigation of a chilled water district cooling unit using mono and hybrid nanofluids

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