Air side performance of tube bank of an evaporator in a window air-conditioner by CFD simulation with different circular tubes with uniform transverse pitch variation

Souza, Peter D; Biswas, Deepankar; Deshmukh, S.P.

doi:10.1016/j.ijft.2020.100028

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…If we know and understand the dimensions of the problem and its causes, we will have the opportunity to enhance our ability to rationally develop therapeutic and diagnostic interventions, and preventive measures, as well as to improve existing air conditioning systems with preventive measures to limit the spread of the epidemic. All HVAC systems rely on the use of air as a medium for heat exchange between them and the place to be conditioned, and therefore air is considered a carrier medium for microbes, pollutants, and viruses ( Souza et al, 2020 ). All sites and inhabited places with their occupants that are not air-conditioned cause heat stress that leads to feelings of discomfort and a sense of difficulty coexisting in this climate and this may affect the degree of their activity, health, and immunity, and thus reduce resistance to infection with the COVID-19 and similar viruses.…”

Section: The Role Of Hvac Systems In the Spread Of Covid-19mentioning

confidence: 99%

A critical review of heating, ventilation, and air conditioning (HVAC) systems within the context of a global SARS-CoV-2 epidemic

Elsaid

Mohamed

Abdelaziz

et al. 2021

Process Safety and Environmental Protection

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The Coronavirus disease (COVID-19) has spread over the world, resulting in more than 225 million patients, and 4.7 million deaths in September 2021. It also caused panic and terror, halted numerous activities, and resulted in the world economy deteriorates. It altered human behavior and compelled people to alter their lifestyles to avoid infection. Air conditioning systems are one of the most important sectors that must be considered because of the pandemic SARS-CoV-2 all over the world. Air is used as a heat transfer medium in heating, ventilation, and air conditioning (HVAC) systems. The air contains a variety of pollutants, viruses, and bacteria, all of which have an impact on and destroy human life. Significantly in summer, people spend more time in air conditioners which results in lower levels of vitamin D and melatonin which may affect the functioning of their immune system and are susceptible to receiving SARS-CoV-2 from other individuals. As an important component of air conditioning and ventilation systems, the air filter plays a significant role. As a result, researchers must work harder to improve its design to prevent the ultra-small particles loaded with COVID-19. This paper contributes to the design of existing HVAC systems in terms of their suitability and impact on the spread of the hybrid SARS-CoV-2 epidemic, as well as efforts to obtain a highly efficient air filter to remove super-sized particles for protection against epidemic infection. In addition, important guideline recommendations have been extracted to limit the spread of the SARS-CoV-2 throughout the world and to get the highest quality indoor air in air-conditioned places.

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Section: The Role Of Hvac Systems In the Spread Of Covid-19mentioning

confidence: 99%

A critical review of heating, ventilation, and air conditioning (HVAC) systems within the context of a global SARS-CoV-2 epidemic

Elsaid

Mohamed

Abdelaziz

et al. 2021

Process Safety and Environmental Protection

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“…Three dimensional CFD model was developed by Lui et al [3] by studying the effect of longitudinal and transverse pitch of heat recovery device used in wind tower system on the ventilation and thermal performance. Their results showed that the heat recovery was improved by reducing the pitches in the two directions raising the fresh air temperature up to 64 o C. Souza, et al [4] investigated numerically an evaporator for two-dimensional models of window air conditioner type. They used market available sizes copper pipes of six transverse pitch with velocity range 1.5 to 4 m/s.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation for Seawater Air Precooler

Etaiwe

Sakr²,

Salem³

et al. 2022

Journal of Al-Azhar University Engineering Sector

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The low-temperature seawater is an important renewable source used for direct and indirect seawater air conditioning. In the northern Arabian Gulf, the water depth is insufficient for direct seawater air conditioning. So, for such circumstances, seawater can be utilized as an auxiliary for precooling the returned air from the conditioned space. In this study, a two-dimensional numerical simulation model of crossflow for a 20-tube bank in a staggered arrangement with a /D as 1.5 and 1.25

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“…The authors observed a non-uniform frost development at lower Reynolds numbers. Souza et al [15] simulated the performance response of an evaporator tube bundle of seven rows and different transverse pitches. Choudhary et al [16] practically outlined the effect of integrating perforated splitter plates to isofluxed tube bundle on the hydrothermal performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of spaces between aligned tubes having a semicircular section on heat exchange attributes

Almulla,

Salem

2021

Engineering Research Journal - Faculty of Engineering (Shoubra)

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This paper introduces experimental tests to investigate the hydrothermal characteristics of align-complete circular tube (CCT) or semicircular tube (SCT) banks at a wide range of airflow across the tubes. The tests considered several gap ratios between the bases (0.126    0.378) of pairs of SCTs with different pitch ratios in transversal/longitudinal directions. The findings declare that the SCT is a helpful passive tool for supplementing the air-cooling load, while it also leads to raising the airflow resistance, when compared with systematic shape. Moreover, the Nu o and 𝑓 o are increased by expanding the space between the flat bases and decreasing the spacing between the tubes in both directions. Besides, the hydrothermal performance approach (HTPA) is affected by varying SCT geometrical parameters. It is increased by increasing the gap between the flat SCTs-bases in addition to the transversal pitch and decreasing the longitudinal pitch. It is recorded that the maximum value of HTPA through this study is 2.25.

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Air side performance of tube bank of an evaporator in a window air-conditioner by CFD simulation with different circular tubes with uniform transverse pitch variation

Cited by 6 publications

References 23 publications

A critical review of heating, ventilation, and air conditioning (HVAC) systems within the context of a global SARS-CoV-2 epidemic

A critical review of heating, ventilation, and air conditioning (HVAC) systems within the context of a global SARS-CoV-2 epidemic

Numerical Simulation for Seawater Air Precooler

Effect of spaces between aligned tubes having a semicircular section on heat exchange attributes

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