Design and performance analysis of a small solar evaporative cooler

Lotfizadeh, Hossein; Layeghi, Mohammad

doi:10.1007/s12053-013-9199-5

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…Lotfizadeh and Layeghi described a simple yet innovative solar evaporative cooler and conducted tests under different temperature conditions in the room. The performance of the proposed system was evaluated and it was concluded that high performance cooling pads and solar panels could improve performance [7]. Cannistraro et al [8] proposed a "local mean radiant temperature" and conducted a study on local comfort conditions using the corresponding values obtained from the mean radiant temperature proposed in the literature.…”

Section: Introductionmentioning

confidence: 99%

Energy Performance of Liquid Desiccant and Evaporative Cooling-Assisted 100% Outdoor Air Systems under Various Climatic Conditions

Jeong

2018

Energies

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The main purpose of this study is to evaluate the applicability of a liquid desiccant and evaporative cooling-assisted 100% outdoor air system (LD-IDECOAS) in six typical cities in China. The six cities are located in different climatic zones in China and are selected because they are comparable owing to the outdoor air conditions. Many studies have shown that the annual operating energy consumption of LD-IDECOAS is nearly half compared with the conventional variable air volume (VAV) system. Because the climate characteristics of the six selected cities were different, the appropriate mode of operation of the LD-IDECAOS was applied to each studied city, and energy simulations were performed. Based on the design conditions of each region, the required cooling and heating loads were calculated for office buildings using transient system simulations (TRNSYS) 17, and the performance of the LD-IDECOAS and its energy consumption were simulated with a commercial engineering equation solver (EES) program. Depending on the climate characteristics of each city, adequate modifications were evaluated with simulations in terms of energy consumption. The proposed system was compared with the VAV system and the evaporative cooling assisted 100% outdoor airconditioning system (IDECOAS) for detailed simulation results in the effort to evaluate the energy-saving potential. Finally, the results show that the proposed system saves considerable energy over conventional VAV systems and, in summer, the applications save even more energy than IDECOAS. However, there is a slight difference between the different geographical regions in terms of the annual operating energy consumption. In summary, the proposed system can yield significant energy-saving benefits in hot and humid regions whereas, in dry regions, the proposed system is more applicable in the summer. Consequently, LD-IDECOAS can be adopted for different climatic zones as a heating, ventilating, and airconditioning (HVAC) system by introducing 100% outdoor air.

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Section: Introductionmentioning

confidence: 99%

Energy Performance of Liquid Desiccant and Evaporative Cooling-Assisted 100% Outdoor Air Systems under Various Climatic Conditions

Jeong

2018

Energies

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“…The performance was assessed for seventeen consecutive days, from 20 May, 2019 to 5 June, 2019. The 17 days of monitoring were opted based on the previous researchers who were suggested the evaluation performance of evaporative cooling systems can be evaluated up to twenty days (Lotfizadeh and Layeghi, 2013;Wayua et al, 2012). The study was conducted during the highly humid month in Vunjo (May and June) to get the performance of these systems at this season because previous researchers reported the low performance of evaporative cooling systems in high ambient relative humidity areas (Anyawu, 1995;Soponpongpipat and Kositchaimongkol, 2011;Wayua et al 2012).…”

Section: Experimental Setup and Operation Principlementioning

confidence: 99%

Performance Evaluation of Evaporative Cooling Systems as Alternative for Increasing the Shelf Life of Perishable Crops at the Farmer Level in Vunjo-Moshi Rural

Msacky,

Leonard

2023

Int. J. Environ.

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Postharvest handling in developing countries continues to be a major challenge for most of the farmers. The low economy in these countries is counted as a major obstacle toward the adaptation of modern postharvest technologies. The present study aimed to assess the existing post-harvest handling practises and test the suitability of evaporative cooling systems for reducing post-harvest losses by using Vunjo-Moshi Rural as a case study. A total of 30 questionnaires covering small commercial farmers were utilised to get information regarding the existing post-harvest handling practices in Vunjo. Two evaporative cooling systems, the Charcoal Cooler Chamber and Sand Cooler Chamber, were created and tested in Vunjo. Their effectiveness was measured by their response to temperature and humidity changes. Results indicated that 87% of the small farmers in Vunjo used local precooling and cold storage methods characterised by low efficiency. Further results showed 77% of all spoilage crops were randomly disposed of in the environment regardless of their impacts. Performance results of designed evaporative systems showed that the Charcoal Cooler Chamber (at its highest performance), could lower the daily ambient temperature by 8.8 °C while increasing the ambient relative humidity from 73.01% to 90.93%. The Sand Cooler Chamber could reduce the daily ambient temperature by 7.8 °C and increase the ambient relative humidity from 73.01% to 93.90%. The performance of both designed systems met the recommended standard for increasing the shelf life of most of the perishable crops cultivated in Vunjo, making them recommended as alternative precooling and cold storage technologies.

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“…With the dry bulb and wet bulb temperature relations, the values of relative humidity are obtained through hygrometric tables. The following relation shows the influence of relative humidity on PV panel, with changes in temperature levels [10].…”

Section: Basics Of Relative Humidity Effect On Pv Modulesmentioning

confidence: 99%

Performance Evaluation of Photovoltaic System in Humid Atmosphere

Desappan

Natarajan

Lakshmi

2015

AMM

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The photovoltaic system converts electrical energy from solar radiation energy. It is preferable because it has no moving parts and low pollution to the environment. The performance of photovoltaic system has been decided with environmental aspects apart from the photovoltaic system specifications and incident solar radiation. In this research, the influence of relative humidity on photovoltaic system is considered for evaluating the performance and to draw the characteristic curves during winter (December and January) period. The photovoltaic system which installed at Chennai city, India, is exposed to high relative humidity even during winter season. The 3kW photovoltaic system behaviour is considered and measures the photovoltaic output voltage and output current with the effect of relative humidity. The performance curves shows that high relative humidity reduces the output voltage and current from photovoltaic system. It is same as the influence of other adverse environmental factors to degrade the operation and life span of photovoltaic system.

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Design and performance analysis of a small solar evaporative cooler

Cited by 6 publications

References 14 publications

Energy Performance of Liquid Desiccant and Evaporative Cooling-Assisted 100% Outdoor Air Systems under Various Climatic Conditions

Energy Performance of Liquid Desiccant and Evaporative Cooling-Assisted 100% Outdoor Air Systems under Various Climatic Conditions

Performance Evaluation of Evaporative Cooling Systems as Alternative for Increasing the Shelf Life of Perishable Crops at the Farmer Level in Vunjo-Moshi Rural

Performance Evaluation of Photovoltaic System in Humid Atmosphere

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