Performance Comparison between Selected Evaporative Air Coolers

Pandelidis, Demis; Anisimov, Sergey; Drąg, Paweł

doi:10.3390/en10040577

Cited by 10 publications

(3 citation statements)

References 14 publications

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“…An increase in humidity level causes discomfort and it is the key limitation of the DEC system [12][13][14]. Indirect evaporative cooling is a constant humidity process in which ambient air temperature decreases without the addition of moisture/humidity in the air [15,16]. In this process, the air is not directly in contact with water.…”

Section: Proposed Evaporative Cooling (Ec) Optionsmentioning

confidence: 99%

Wet-Bulb and Dew-Point Evaporative Cooling Options for Poultry Sheds

Raza¹,

Sultan²,

Aleem³

2021

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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The present study addressed the applicability of evaporative cooling (EC) systems for poultry birds. In summer, climatic conditions are not favorable for the thermal comfort of poultry birds. Cooling systems available in the market are not energy efficient and cause global warming. Evaporative cooling systems are energy-efficient, low-cost, and environment-friendly options for the thermal comfort of poultry birds. Three kinds of EC systems: direct, indirect, and Maisotsenko cycle-based evaporative cooling (DEC, IEC, and MEC) systems are studied for poultry houses. The performance of the systems is investigated in terms of wet-bulb effectiveness. Temperature-humidity index (THI) is also calculated based on output results to check the thermal comfort of the poultry birds. According to the results, the MEC system performs better as compared to the old DEC and IEC systems. However, the performance of the systems is limited in humid areas.

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Section: Proposed Evaporative Cooling (Ec) Optionsmentioning

confidence: 99%

Wet-Bulb and Dew-Point Evaporative Cooling Options for Poultry Sheds

Raza¹,

Sultan²,

Aleem³

2021

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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“…Moreover using the product channel allows reducing pressure drop in the system. Another advantage of arrangement in Figure 1 (b) compared with Figure 1a would be a possibility to use the product channel as a condenser for gas dehumidification [4].…”

Section: Fundamentals Of M-cycle Hmxmentioning

confidence: 99%

Maisotsenko cycle applications for multistage compressors cooling

Levchenko

Yurko²,

Аrtyukhov

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The present study provides the overview of Maisotsenko Cycle (M-Cycle) applications for gas cooling in compressor systems. Various schemes of gas cooling systems are considered regarding to their thermal efficiency and cooling capacity. Preliminary calculation of M-cycle HMX has been conducted. It is found that M-cycle HMX scheme allows to brake the limit of the ambient wet bulb temperature for evaporative cooling. It has demonstrated that a compact integrated heat and moisture exchange process can cool product fluid to the level below the ambient wet bulb temperature, even to the level of dew point temperature of the incoming air with substantially lower water and energy consumption requirements. IntroductionGas compression and transportation is one of the most energy consuming technologies in the world. Compressors are a vital link in the conversion of raw materials into refined products. Compressors also handle economical use and transformation of energy from one form into another. They are used for the extraction of metals and minerals in mining operations, for the conservation of energy in natural gas reinjection plants, for secondary recovery processes in oil fields, for the utilization of new energy sources such as shale oil and tar sands, for furnishing utility or reaction air, for oxygen and reaction gases in almost any process, for process chemical and petrochemical plants, and for the separation and liquefaction of gases in air separation plants and in LPG and LNG plants. The economy and feasibility of all these applications depend on the reliability of compressors and the capability of the compressors selected to handle a given gas at the desired capacity [1]. Since, value of specific work for all compressors is determined by several factors as: specific heat ratio k, specific gas constant R, pressure ratio  and inlet temperature T in . As a rule, all the enumerated factors except the inlet temperature are defined by the initial conditions and/or performance specification for the designed compressor. That is why inlet temperature reduction remains the most feasible way to reduce compressors' specific work.There are a lot of approaches to reduce T in value (depending on the place of cooling):

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“…Zhan et al [15], Anisimov et al [16], and Pandelidis et al [17] each provided a comparative study of different configurations of HMXs. Their results have shown that a counter-flow HMX offers high cooling effectiveness but yields lower values of cooling capacity to handle a large cooling load.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids

et al. 2018

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The incorporation of a Maisotsenko (M) Cycle into an indirect evaporative cooler has led to the achievement of sub-wet bulb temperature without any humidification, thus making it a possible green and sustainable alternative for handling the cooling load of a building. In this work, the thermal performance of a cross-flow heat and mass exchanger (HMX) is enhanced by the addition of nanoparticles in the wet channel because they significantly influence the heat and mass transfer characteristics of the base fluid. A governing model for the temperature and humidity variations of the HMX is numerically simulated. Initial benchmarking is achieved using water properties. Afterward, a comparative study is conducted using aluminum-oxide-, copper-oxide-, and titanium-oxide-based nanofluids. Enhancements of 24.2% in heat flux, 19.24% in wet bulb effectiveness, 7.04% in dew point effectiveness, 29.66% in cooling capacity, and 28.43% in energy efficiency ratio are observed by using alumina-based nanofluid as compared to water in the wet channel of the cross-flow HMX. Furthermore, a particle volume concentration of 1% and a particle diameter of 20nm are recommended for maximum performance.

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Performance Comparison between Selected Evaporative Air Coolers

Cited by 10 publications

References 14 publications

Wet-Bulb and Dew-Point Evaporative Cooling Options for Poultry Sheds

Wet-Bulb and Dew-Point Evaporative Cooling Options for Poultry Sheds

Maisotsenko cycle applications for multistage compressors cooling

Thermal Performance Enhancement of a Cross-Flow-Type Maisotsenko Heat and Mass Exchanger Using Various Nanofluids

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