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Relevant bibliographies by topics / Direct evaporative cooler

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Academic literature on the topic 'Direct evaporative cooler'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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Journal articles on the topic "Direct evaporative cooler"

1

Kettleborough, C. F., D. G. Waugaman, and M. Johnson. "The Thermal Performance of the Cross-Flow Three-Dimensional Flat Plate Indirect Evaporative Cooler." Journal of Energy Resources Technology 114, no. 3 (1992): 181–86. http://dx.doi.org/10.1115/1.2905939.

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Evaporative coolers consist of two main types: (a) the direct evaporative cooler in which water mixes with the air to be cooled; and (b) the indirect evaporative cooler in which water is sprayed into alternate passages cooling the secondary airflow, which in turns cools the primary flow which then passes to the building to be cooled. A three-dimensional numerical evaluation of the indirect cooler is given. Energy and mass balance equations are derived for the primary and secondary flows and the effectiveness is calculated for different variable inlet velocities and compared with experimental values.

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2

Yu, F. W., and K. T. Chan. "Application of Direct Evaporative Coolers for Improving the Energy Efficiency of Air-Cooled Chillers." Journal of Solar Energy Engineering 127, no. 3 (2005): 430–33. http://dx.doi.org/10.1115/1.1866144.

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This paper describes how direct evaporative coolers can be used to improve the energy efficiency of air-cooled chillers in various operating conditions and with different strategies for staging condenser fans. These coolers are installed in front of air-cooled condensers to precool outdoor air before entering the condensers. A simulation analysis on an air-cooled chiller equipped with a direct evaporative cooler showed that when head pressure control is used, the cooler enables the condensing temperature to drop by 2.1–6.2°C, resulting in a 1.4-14.4% decrease in chiller power and a 1.3–4.6% increase in the refrigeration effect. When the chiller with the cooler operates under condensing temperature control, where condenser effectiveness is enhanced by staging all condenser fans, there is a savings in chiller power of 1.3-4.3% in some operating conditions in which the drop in compressor power exceeds the additional condenser fan power due to the pressure drop across the cooler.

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Pisal, Prof Mr N. S. "Design and Development of Solar Powered 360degree Automatic Air Cooler." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (2022): 837–40. http://dx.doi.org/10.22214/ijraset.2022.45370.

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Abstract: Evaporative coolers lower the temperature of air using the principle of evaporative cooling, unlike typical air conditioning systems which use vapor-compression refrigeration or absorption refrigerator. Evaporative cooling is the conversion of liquid water into vapor using the thermal energy in the air, resulting in a lower air temperature. The energy needed to evaporate the water is taken from the air in the form of sensible heat, which affects the temperature of the air, and converted into latent heat, the energy present in the water vapor component of the air, whilst the air remains at a constant enthalpy value. Vapor-compression refrigeration uses evaporative cooling, but the evaporated vapor is within a sealed system, and is then compressed ready to evaporate again, using energy to do so. Simple evaporative coolers water is evaporated into the environment, and not recovered. In an interior space cooling unit, the evaporated water is introduced into the space along with the now-cooled air; in an evaporative tower the evaporated water is carried off in the airflow exhaust. To Develop the Energy efficient, environment friendly direct evaporative air conditioning system having low operating cost suitable for hot and dry regions To Manufacture advanced 360-degree Rotating air cooler which rotates and provide air cooling in all directions. It can be used for domestic as well as Industrial applications. The temperature of dry air can be dropped significantly through the phase transition of liquid water to water vapor (evaporation). This can cool air using much less energy than refrigeration. In extremely dry climates, evaporative cooling of air has the added benefit of conditioning the air with more moisture for the comfort of building occupants

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Jahidul, Haque Chaudhuri, Deb Rohan, and De Jhinuk. "Innovative Way to Decrease the Water Consumption of Direct Evaporative Air-Cooler." International Journal of Recent Technology and Engineering (IJRTE) 9, no. 3 (2022): 115–21. https://doi.org/10.5281/zenodo.5842807.

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In the present study the existing direct evaporative coolers (DEC) is modified in such a way that DEC consume less amount of water and provide better cooling effect. In desert area, water consumption by air cooler is a serious problem. Therefore, the present study addressed this issue and primary objective of the study is to minimize the consumption of water. For this purpose, the property of the endothermic reaction is utilized. There are few salts that produce endothermic reaction if it is diluted in water. Those salt crystals absorb heat from the surrounding environment (water) and ultimately the temperature of the overall solution gets reduced. This cold solution is then passed through honeycomb cooling pad, as a result more amount of air can be cooled using the same volume of water as compared to the traditional air-cooler. Ammonium Chloride (NH4Cl), Ammonium Nitrite (NH4NO3) salts satisfy the basic criteria for the endothermic reaction but NH4Cl will be more useful to use in the air-coolers, as Ammonium Nitrite is costlier and also hazardous. A salt water separator arrangement also attached with modified air-cooler which will help to regenerate Ammonium Chloride crystal from solution with the help of solar energy. In this study, firstly discussed about proposed design of an air-cooler system, which is able to nicely handle chemical solution. Then compared the study with experimental outcome which have been carried out with and without using salt. From the result it has been observed that modified design of air cooler has great potential to improve the traditional air cooler in terms of cooling effect and water consumption.

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Liu, Su, and Jae-Weon Jeong. "Energy Performance Comparison between Two Liquid Desiccant and Evaporative Cooling-Assisted Air Conditioning Systems." Energies 13, no. 3 (2020): 522. http://dx.doi.org/10.3390/en13030522.

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This study investigated the annual energy saving potential and system performance of two different evaporative cooling-based liquid desiccant and evaporative cooling-assisted air conditioning systems. One system used an indirect and direct evaporative cooler with a two-stage package to match the target supply air point. The other was equipped with a single-stage, packaged dew-point evaporative cooler that used a portion of the process air, which had been dehumidified in advance. Systems installed with the two evaporative coolers were compared to determine which one was more energy efficient and which one could provide better thermal comfort for building occupants in a given climate zone, using detailed simulation data. The detailed energy consumption data of these two systems were estimated using an engineering equation solver with each component model. The results showed that the liquid desiccant and dew-point evaporative-cooler-assisted 100% outdoor air system (LDEOAS) resulted in approximately 34% more annual primary energy consumption than that of the liquid desiccant and the indirect and direct evaporative-cooler-assisted 100% outdoor air system (LDIDECOAS). However, the LDEOAS could provide drier and cooler supply air, compared with the LDIDECOAS. In conclusion, LDIDECOAS has a higher energy saving potential than LDEOAS, with an acceptable level of thermal comfort.

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Yuliasari, Hikmah, Kavadya Syska, and Ropiudin Ropiudin. "Disain dan Uji Kinerja Pendingin Evaporatif Tipe Aliran Searah Menggunakan CFD (Computational Fluid Dynamics)." Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) 10, no. 3 (2021): 338. http://dx.doi.org/10.23960/jtep-l.v10i3.338-350.

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After harvesting, fruits will change due to physiological, physical, chemical, and microbiological influences, and they are living materials. Therefore, it is necessary to know how to harvest and handle fresh fruits and their storage conditions to handle the fruits after harvesting so that the quality of the products can be maintained. One of the first treatments in the fruit cold chain is evaporative cooling. In order to get an evaporative cooling system that has an even temperature distribution, it is necessary to make a spatial model when designing an evaporative cooling system using CFD (Computational Fluid Dynamics). The objectives of this research are: (1) design of direct flow type evaporative cooling systems and (2) test the performance of direct flow type evaporative coolers. This research method uses design methods, experiments, and computer simulations. The results showed the performance of the evaporative cooler system in the scenario with the roof on, the highest effectiveness value was 1.198, the highest approximation value was 2.832, and the highest range value was 4.589. In the scenario without a roof on the evaporative cooler system, the highest effectiveness value was 1.767, the highest approach value was 2.139, and the highest range value was 4.835. The CFD analysis in the scenario with a roof had the highest temperature value of 25.9 ° C and the lowest temperature of 21.9 ° C, while the CFD analysis in the scenario without roof had the highest temperature of 23.7 ° C and the lowest temperature of 20.4 ° C. Keywords: CFD, direct flow type, evaporative cooler, quality, fruit

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Camargo, J. R., C. D. Ebinuma, and S. Cardoso. "A MATHEMATICAL MODEL FOR DIRECT EVAPORATIVE COOLING AIR CONDITIONING SYSTEM." Revista de Engenharia Térmica 2, no. 2 (2003): 30. http://dx.doi.org/10.5380/reterm.v2i2.3473.

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Air conditioning systems are responsible for increasing men's workefficiency as well for his comfort, mainly in the warm periods of the year.Currently, the most used system is the mechanical vapor compressionsystem. However, in many cases, evaporative cooling system can be aneconomical alternative to replace the conventional system, under severalconditions, or as a pre-cooler in the conventional systems. It leads to areduction in the operational cost, comparing with systems using onlymechanical refrigeration. Evaporative cooling operates using inducedprocesses of heat and mass transfer, where water and air are the workingfluids. It consists in water evaporation, induced by the passage of an airflow, thus decreasing the air temperature. This paper presents the basicprinciples of the evaporative cooling process for human thermal comfort,the principles of operation for the direct evaporative cooling system andthe mathematical development of the equations of thermal exchanges,allowing the determination of the effectiveness of saturation. It alsopresents some results of experimental tests in a direct evaporative coolerthat take place in the Air Conditioning Laboratory at the University ofTaubaté Mechanical Engineering Department, and the experimental resultsare used to determinate the convective heat transfer coefficient and tocompare with the mathematical model.

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El-Ghalban, A. R., M. A. Habib, A. H. Farag, and T. A. Shalma. "PERFORMANCE OF A DIRECT EVAPORATIVE AIR COOLER." ERJ. Engineering Research Journal 28, no. 3 (2005): 253–66. http://dx.doi.org/10.21608/erjm.2005.69962.

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Kovačević, Igor, and Maarten Sourbron. "The numerical model for direct evaporative cooler." Applied Thermal Engineering 113 (February 2017): 8–19. http://dx.doi.org/10.1016/j.applthermaleng.2016.11.025.

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Cichoñ, Aleksandra, Anna Pacak, Demis Pandelidis, and Sergey Anisimov. "Application of the counter- and cross-flow indirect evaporative cooler for heat recovery under different climate conditions." E3S Web of Conferences 100 (2019): 00010. http://dx.doi.org/10.1051/e3sconf/201910000010.

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This paper investigates the potential of applying an indirect evaporative cooler for heat recovery in air-conditioning system under various climate conditions. The counter- and cross-flow configurations of the indirect evaporative exchanger are addressed in this study in terms of their performance and applicability for different climate zones. Presented analyses are carried out with original ε-NTU model considering condensation from the product airflow and validated against experimental data. It was stated that both configurations of the indirect evaporative exchanger have a high application potential to be employed as a heat recovery device under most climatic parameters. Additionally for each climate zone considered in this paper, the air-conditioning system that consists of either the indirect evaporative exchanger and vapor-compression cooler or indirect evaporative exchanger and direct evaporative cooler is proposed.

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Books on the topic "Direct evaporative cooler"

1

American Society of Heating, Refrigerating and Air-Conditioning Engineers. Method of testing direct evaporative air coolers. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 2001.

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Method of Testing Direct Evaporative Air Coolers (A S H R a E Standards, 133-2001). Amer Society of Heating, 2001.

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Book chapters on the topic "Direct evaporative cooler"

1

Watt, John R. "Direct Evaporative Cooler Installation." In Evaporative Air Conditioning Handbook. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2259-7_18.

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Watt, John R. "Direct Cooler Rating and Sizing." In Evaporative Air Conditioning Handbook. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2259-7_17.

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Udgire, Manojkumar. "Experimental Investigation of Direct Evaporative Cooler with Sisal, Hemp, and Abaca Cooling Pad Material." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7557-0_2.

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Watt, John R. "Commercial Direct Evaporative Coolers." In Evaporative Air Conditioning Handbook. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2259-7_9.

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Alemu, Aschale G., Atrsaw J. Bezie, Tereche G. Tesfa, et al. "Experimental Investigation of the Performance of a Solar-Powered Direct Evaporative Cooler Using a Chiller: Case Study Bahir Dar, Ethiopia." In Green Energy and Technology. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-81730-4_13.

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Watt, John R. "Drip-Type Direct Evaporative Coolers." In Evaporative Air Conditioning Handbook. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2259-7_6.

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Olaniyan, Olugbemi T., Nyejirime Young Wike, Charles Oluwaseun Adetunji, et al. "Evaporative cooling principles: Direct and indirect air cooling, and direct evaporative cooling." In Engineering Principles, Modelling and Economics of Evaporative Coolers. Elsevier, 2023. http://dx.doi.org/10.1016/b978-0-323-90039-3.00012-8.

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Conference papers on the topic "Direct evaporative cooler"

1

Schutz, R. W., and J. S. Grauman. "Localized Corrosion Behavior of Titanium Alloys in High Temperature Seawater Service." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88162.

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Abstract Titanium alloys have become well established as choice corrosion-resistant materials for high temperature seawater service based on their superior chloride corrosion resistance. Useful pH-temperature guidelines have been developed which advocate the selection of grade 7 or 12 titanium when crevice corrosion becomes a limiting mode of attack for unalloyed titanium. However, a few unexpected cases of severe pitting of grade 12 titanium tubes in high temperature seawater-cooled oil refinery overhead exchangers have been reported. Investigation revealed that attack involved total seasalt pluggage of exchanger tubes, associated with very low (&lt; 0.6m/sec) tubeside seawater flow rates and high process-side temperatures (&gt; 177°C). Laboratory simulation of the tubeside salt pluggage phenomenon demonstrated that evaporative concentration of seawater within tubes produced highly concentrated MgCl2 solutions within salt plugs. Correlation of results from these simulated seasalt plug corrosion tests and laboratory immersion test results in pure concentrated MgCl2 solutions indicated that local high temperature MgCl2 hydrolysis was directly responsible for the unique form of pitting observed. Temperature limits for localized corrosion of titanium alloys as a function of NaCl and MgCl2 concentration are generated as well, revealing that grade 12 and, especially, grade 7 titanium offer useful resistance to a significantly expanded range of seawater concentrations and temperatures as compared to unalloyed titanium. Strategies for assuring successful performance of grade 12 titanium in high temperature seawater-cooled exchangers are offered.

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Sheng, Chenguang, and A. G. Agwu Nnanna. "Empirical Correlation of Cooling Efficiency and Transport Phenomena of Direct Evaporative Cooler." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63227.

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Direct evaporative cooling (DEC) uses evaporating water, combined with a wetted medium to cool the temperature of air as it passes through. Evaporative cooling devices can reduce the energy consumption of HVAC&R (Heating, Ventilating, Air Conditioning, and Refrigeration Equipment). Heat is absorbed whenever water is evaporated and converted to water vapor. By passing through or around a wetted surface, heat is removed from the surrounding air in the vaporization of the water. The process approximates the adiabatic-saturation process and the path lies on a constant wet-bulb temperature which is a constant enthalpy line. This paper suspects the relationship between system parameters and cooling efficiency. Effects of three system parameters on cooling performance were evaluated. The three parameters selected for focus were the speed of frontal air, the dry-bulb temperature of frontal air, and the temperature of the incoming water. Each parameter was varied while holding all other variables like air, water mass flow rates and so on constant respectively, and data was collected using several different levels of each parameter. The general relationship between each parameter and efficiency was determined by graphing the data collected and observing trends. The empirical correlation between supply frontal air velocity and cooling efficiency for DEC system in a typical applied environment was established and verified by experiment data. Within certain ranges, DEC cooling efficiency increases with frontal air dry-bulb temperature; decreases with frontal air velocity and incoming water temperature correspondingly.

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Singh, Ashutosh, and Rahul Dev. "Theoretical and experimental analysis of direct evaporative cooler with fin structured pads." In 2017 International Conference on Advances in Mechanical, Industrial, Automation and Management Systems (AMIAMS). IEEE, 2017. http://dx.doi.org/10.1109/amiams.2017.8069200.

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McCabe, Joseph. "PV Operated HVAC for Southwest States." In ASME 2006 International Solar Energy Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/isec2006-99137.

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This report analyzes energy usage and associated utility capacity requirements for compressor based air-conditioning compared to evaporative cooling supplied by electricity from photovoltaics (PV). Two novel scenarios are presented, two stage evaporative coolers with grid tied PV, and two stage evaporated coolers supplied with direct current (DC) electricity from PV. The two scenarios are complimentary; where a grid tied system can tap DC for air-conditioning purposes (see Figure 1). 8% PV system gains can be achieved by eliminating the inverter for powering such a DC heating, ventilating and air-conditioning (HVAC) system. A PV system directly coupled to high efficiency evaporative cooler can remove the air-conditioner peak demand from a utilities load profile. Typical cities energy comparisons are presented. Incentive and public goods programs are not necessarily designed for this optimized, direct utilization of DC approach.

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Zadpoor, Amir Abbas, and Ali Asadi Nikooyan. "Development of an Improved Desiccant-Based Evaporative Cooling System for Gas Turbines." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50258.

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The evaporative inlet cooling systems used for inlet cooling of gas turbines during hot summers do not work well in humid areas. However, desiccant wheels can be used to dehumidify the air before passing it trough the evaporative cooler. Since the desiccant wheels work adiabatically, the resulting air is hotter than the air introduced to the wheel and an evaporative cooling system is used to cool down the dehumidified air. Combined direct and indirect evaporative coolers have been already used to investigate the effects of dehumidification on the effectiveness of the evaporation cooling systems. It is shown that a single desiccant wheel does not offer much higher effectiveness compared to the multiple-stage evaporative systems. In this paper, an improved version of the desiccant inlet cooling system is presented. Additional dehumidification and indirect evaporative cooling stages are added to increase the effectiveness of the inlet cooling. A typical gas turbine cycle along with an industrial gas turbine with actual performance curves are used to simulate the thermal cycle in presence of the different inlet cooling systems. The simulations are carried out for three different climatic conditions. The improved and original desiccant-based systems are compared and it is shown that the added stages substantially improve the effectiveness of the desiccant-based inlet cooling.

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Hirano, Shun, Yoshinori Hisazumi, Tsukasa Hori, et al. "Enthalpy and Exergy Analysis of Domestic Desiccant Air Conditioner With Cooling Dehumidification and Heating Humidification Using Process Simulator." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55368.

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To popularize the use of desiccant air conditioners in residences, a system that can supply cooled and dried air in summer as well as heated and humidified air in winter is proposed. An evaporative cooler that affords an increase in cooling capacity and the amount of humidification is used in this system. The results of the enthalpy and exergy analyses, performed using a process simulator, showed that significant exergy losses occurred at the blower, heater, and desiccant rotor. In addition, exergy loss occurred at the direct evaporative cooler in heating humidification. Furthermore, it was found that there exists an optimal water temperature that yields peak exergy efficiency from the desiccant rotor.

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Anisimov, Sergey, Aleksandr Kozlov, Paul Glanville, Mark Khinkis, Valeriy Maisotsenko, and Jessica Shi. "Advanced Cooling Tower Concept for Commercial and Industrial Applications." In ASME 2014 Power Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/power2014-32020.

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For the majority of cooling towers installed, of which there are greater than half a million installed in the U.S., tower design uses direct evaporative cooler technology where an ideally enthalpy-neutral process cools the process water stream to a temperature above the ambient wet bulb. This ambient wet bulb temperature is the limiting factor for the process cooling. As such the energy-water connection is clear, these cooling towers are direct consumers of treated water and their cooling performance is intimately tied to the process efficiency.

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Aziz, Azridjal, Rahmat Iman Mainil, Afdhal Kurniawan Mainil, and Hendra Listiono. "Effect of water temperature and air stream velocity on performance of direct evaporative air cooler for thermal comfort." In INTERNATIONAL CONFERENCE ON ENGINEERING, SCIENCE AND NANOTECHNOLOGY 2016 (ICESNANO 2016). Author(s), 2017. http://dx.doi.org/10.1063/1.4968277.

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Cabrera, Samuel, and Van P. Carey. "Use of Genetic Algorithms to Extract Fundamental Heat Transfer Performance Parameters From Evaporative Cooler Test Data." In ASME 2022 Heat Transfer Summer Conference collocated with the ASME 2022 16th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/ht2022-86172.

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Abstract To understand the effect of ZnO nanostructures on various metal surfaces, previous experiments have tested the evaporation performance of ZnO coated surfaces through single droplet deposition and pool boiling experiments. Results indicate that applying ZnO superhydrophilic surfaces on metal substrates enhances surface wettability and single droplet vaporization. These superhydrophilic surfaces have the potential to be easily scaled up to larger and more complex heat exchangers and enhance spray cooling processes. Consequently, this study explores the direct evaporative cooling of ZnO coated and non-coated copper wavy fin heat exchangers. The experimental apparatus consists of an airflow and water flow system. The airflow system consists of a variable speed fan and an electric heater that preheats air before it flows into the wavy fins and the water flow system consists of a low volumetric water flow nozzle that sprays droplets into the wavy fins. Experimental results and machine learning tools are used in tandem to characterize the efficiency of the heat exchangers and to extract fundamental heat transfer performance parameters such as the average heat transfer coefficient. Specifically, a genetic algorithm is used to determine how the Colburn heat transfer factor varies with Reynolds number, and how the wetted interfacial area varies with flow conditions. Thus, in addition to providing greater insight into the performance of the heat exchanger and its dependence on system parameters, a genetic algorithm helps attain an optimal design consisting of ZnO coated surfaces that will greatly enhance spray cooling systems.

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Al Ezzi, Amged, Hongbin Ma, and Laith Ismael. "AN ANALYTICAL MODEL FOR HEAT AND MASS TRANSFER PROCESSES IN NEW HYBRID INDIRECT/DIRECT EVAPORATIVE COOLER CONCEPT WITH PARALLEL FLOW CONFIGURATION." In 3rd Thermal and Fluids Engineering Conference (TFEC). Begellhouse, 2018. http://dx.doi.org/10.1615/tfec2018.che.021866.

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