scholarly journals Experimental and Numerical Analysis of a Sustainable Farming Compartment with Evaporative Cooling System

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 823
Author(s):  
M. Sina Mousavi ◽  
Siamak Mirfendereski ◽  
Jae Sung Park ◽  
Jongwan Eun
Keyword(s):  
United Arab Emirates ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Temperature Drop ◽  
Experimental Results ◽  
Optimized Design ◽  
Sustainable Farming ◽  
Humidity Change ◽  
Evaporative Cooling System ◽  
Parametric Studies

The United Arab Emirates (UAE) relies on groundwater as well as desalinated water which are very expensive and energy-concentrated. Despite the lack of water resources, only 54% of wastewater was recycled in the UAE in 2016. In this study, a Sustainable Farming Compartment (SFC) with an evaporative cooling system is investigated as an alternative to reusing wastewater and the optimal design is identified experimentally and numerically. First, the applicability of the SFC was examined to reduce the ambient temperature in the system. A prototype SFC was tested in the environmentally constrained laboratory and field site considering an extreme climate condition (with high temperature and humidity) in Abu Dhabi to evaluate the temperature drop and humidity change of the SFC. The experimental results showed that the temperature of the SFC significantly decreases by 7–15 °C when the initial relative humidity is 50%. For validation, an energy modeling using dynamic numerical simulations was performed that shows statistically good agreement with the experimental results. Based on the parametric studies of the system components, the optimal cooling performance of the system in terms of locations of inlet and outlet, the variation of Reynolds number was evaluated. The study suggested an optimized design for the SFC with an evaporative cooling system.

scholarly journals Energy-Based Performance Analysis of a Sustainable Farming Compartment with Evaporative Cooling System

2018 ◽  
Author(s):  
M. Sina Mousavi ◽  
Siamak Mirfendereski ◽  
Jae Sung Park ◽  
Jongwan Eun
Keyword(s):  
Relative Humidity ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Experimental Results ◽  
Treated Wastewater ◽  
Total Power ◽  
Field Site ◽  
Sustainable Farming ◽  
Total Power Consumption ◽  
Evaporative Cooling System

The United Arab Emirates (UAE) is significantly dependent on desalinated water and groundwater resource, which is expensive and highly energy intensive. Despite the scarce water resource, only 54% of the recycled water was reused in 2015. In this study, an “Oasis” complex comprised of Sustainable Farming Compartments (SFCs) was proposed for reusing treated wastewater to decrease the ambient temperature of the SFC via an evaporative cooling system. A prototype SFC with half the original scale (width = 1.8 m, depth = 1.5 m, front height = 1.2 m back height = 0.9 m) was designed, built, and tested in an environmentally controlled laboratory and field site to evaluate the feasibility and effectiveness of the SFC under the climatic conditions in Abu Dhabi. Based on the experimental results, the temperature drops obtained from the SFC in the laboratory and field site were 5 ̊C at initial relative humidity of 60% and 7- 15 ̊C at initial relative humidity of 50%, respectively. An energy simulation using dynamic numerical simulations was performed in comparison to the results of the experiment. The energy-based dynamic simulation shows good agreement with the experimental results. The total power consumption of the SFC system was approximately three and a half times lower than that of an electrical air conditioner.

An Overview of Different Indirect and Semi-Indirect Evaporative Cooling System for Study Potency of Nanopore Skinless Bamboo as An Evaporative Cooling New Porous Material

2021 ◽  
Vol 79 (2) ◽  
pp. 123-130
Author(s):  
I Nyoman Suprapta Winaya ◽  
Hendra Wijaksana ◽  
Made Sucipta ◽  
Ainul Ghurri
Keyword(s):  
Energy Consumption ◽  
Porous Material ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Temperature Drop ◽  
High Energy ◽  
Dew Point ◽  
Air Cooling ◽  
Evaporative Cooling System ◽  
Indirect Evaporative Cooling

The high energy consumption of compressor based cooling system has prompted the researchers to study and develop non-compressor based cooling system that less energy consumption, less environment damaging but still has high enough cooling performances. Indirect and semi indirect evaporative cooling system is the feasible non-compressor based cooling systems that can reach the cooling performance required. This two evaporative cooling system has some different in construction, porous material used, airflow scheme and secondary air cooling method used for various applications. This paper would report the cooling performances achieved by those two cooling system in terms of cooling efficiency, cooling capacity, wet bulb effectiveness, dew point effectiveness, and temperature drop. Porous material used in indirect and semi-indirect evaporative cooling would be highlighted in terms of their type, size, thickness and any other feature. The introduction of nanopore skinless bamboo potency as a new porous material for either indirect or semi-indirect evaporative cooling would be described. In the future study of nanopore skinless bamboo, a surface morphology and several hygrothermal test including sorption, water vapor transmission, thermal conductivity test would be applied, before it utilize as a new porous material for direct or semi indirect evaporative cooling.

Experimental Study on a Novel Evaporative Cooling System Using Ejector and Membrane Dehumidification Module

2015 ◽  
Vol 799-800 ◽  
pp. 720-723
Author(s):  
Si Yuan He
Keyword(s):  
Experimental Study ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Temperature Drop ◽  
Ambient Condition ◽  
Membrane Module ◽  
Cooling Effect ◽  
Humid Environment ◽  
Evaporative Cooling System ◽  
Refrigeration Capacity

A novel evaporative cooling system, which uses an ejector for refrigeration, integrated with a membrane dehumidification module has been studied. In the system investigated, where ultrasonic nebulizers are utilized to pulverize water into droplets for evaporation. The cooling effect influenced by the intensity of ultrasonic automization has been experimentally studied. The prototype of the membrane module is made and several experiments are conducted to evaluate its effect on the system. It is found that, in a permanent inlet air condition, the temperature drop would increase as intensity of ultrasonic grows. Cooling effect of the ejector is better in dry ambient condition compared to moist one. When in the humid environment, the membrane module would increase the system refrigeration capacity by 80%.

scholarly journals Investigação experimental em escala reduzida sobre o uso de telhas cerâmicas como sistema de resfriamento evaporativo

2019 ◽  
Vol 1 (46) ◽  
pp. 121
Author(s):  
Marcelo Paes De Barros
Keyword(s):  
Air Conditioning ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Temperature Drop ◽  
Porous Ceramics ◽  
Climatic Conditions ◽  
Evaporative Cooling System ◽  
Cooling Effects ◽  
Scale Experiment ◽  
Reduced Scale

<p>The present paper describes an experiment that clarifies the cooling effects of the constructed system. Tested in the Cuiabá, MT, environment, the system’s performance,, which works on the evaporative cooling principle made for this study using clay roof tiles was checked in terms of temperature drop and humidity rise air which passes through the system to the surroundings. The result showed that the cooling effect reached a maximum of 3.5 °C and increased the relative humidity of incoming air around 10%. The reduced-scale experiment has reached the appropriate temperature and humidity for air conditioning under human environmental comfort conditions in hot and dry climatic conditions, in 86.4% of the measurement periods. The use of porous ceramics as an evaporative cooling system offers the advantage of the integration into building elements.</p>

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