Analysis on different types of spot cooling systems using best worst method

2021 ◽  
Author(s):  
Mohammed Hameeduddin Haqqani ◽  
Mohammed Azizuddin ◽  
Syed Shuibul Qarnain ◽  
S. Bathrinath
Keyword(s):  
Cooling Systems ◽  
Different Types ◽  
Spot Cooling ◽  
Best Worst Method

scholarly journals Using analytic hierarchy process for evaluating different types of nanofluids for engine cooling systems

2019 ◽  
Vol 23 (5 Part B) ◽  
pp. 3199-3208
Author(s):  
Asli Abdulvahitoglu
Keyword(s):  
Thermal Conductivity ◽  
Analytic Hierarchy Process ◽  
Automotive Industry ◽  
Thermophysical Properties ◽  
Analytic Hierarchy ◽  
Cooling Systems ◽  
Attribute Weights ◽  
Engine Cooling ◽  
Different Types ◽  
Hierarchy Process

The radiator is an important heat exchanger for cooling the engine. Usually, water and ethylene glycol are used in vehicles as cooling fluids. However, these fluids have lower thermal conductivity. In the automotive industry, coolants with better characteristics are being searched to develop more efficient engines. In recent years, nanofluids have become more attractive to car manufacturers, with higher thermal conductivity to increase heat transfer. In this study, the analytic hierarchy process is used to structure the decision problem and to attribute weights to criteria. Three types of nanofluid (Cu-water, NiO-water, and CuO-water) were evaluated. Among the thermophysical properties of nanofluid, the most important one is calculated as the thermal conductivity and also the Cu-water is determined as the most suitable coolant in terms of thermophysical properties among the evaluated nanofluid.

scholarly journals A Review of Solar Photovoltaic Concentrators

2014 ◽  
Vol 2014 ◽  
pp. 1-17 ◽  
Author(s):  
Mehrdad Khamooshi ◽  
Hana Salati ◽  
Fuat Egelioglu ◽  
Ali Hooshyar Faghiri ◽  
Judy Tarabishi ◽  
...  
Keyword(s):  
Cooling System ◽  
Environmental Issues ◽  
Solar Photovoltaic ◽  
Acceptance Angle ◽  
Cooling Systems ◽  
Advantages And Disadvantages ◽  
Different Types ◽  
Additional Costs ◽  
The Cost ◽  
Photovoltaic Solar Cells

Throughout the recent centuries, the limits of using energy resources due to the cost and environmental issues became one of the scientists’ concerns. Because of the huge amount of energy received by the Earth from the sun, the application of photovoltaic solar cells has become popular in the world. The photovoltaic (PV) efficiency can be increased by several factors; concentrating photovoltaic (CPV) system is one of the important tools for efficiency improvement and enables for a reduction in the cell area requirement. The limits of the PV area can reduce the amount of absorbing irradiation; CPV systems can concentrate a large amount of sunlight into a smaller one by applying lenses or curved and flat mirrors. However, the additional costs on concentrating optics and cooling systems made CPV less common than nonconcentrated photovoltaic. This paper reviews the different types of PV concentrators, their performance with advantages and disadvantages, concentration ratio, acceptance angle, brief comparison between their efficiencies, and appropriate cooling system.

scholarly journals Life-cycle evaluation of different types of cooling systems in buildings

2017 ◽  
Vol 142 ◽  
pp. 1743-1748
Author(s):  
Aotian Song ◽  
Lin Lu ◽  
Tao Ma
Keyword(s):  
Life Cycle ◽  
Cooling Systems ◽  
Different Types

scholarly journals The Effect of Tube Length, Cold Exit Diameter and Working Gas on The Cold Flow Temperature of Vortex Tube

2018 ◽  
Vol 225 ◽  
pp. 02010
Author(s):  
Muhammad Fadhli Suhaimi ◽  
Mohd Hazwan Yusof ◽  
Mohamad Nor Hafiz Rashid ◽  
Mohamad Firdaus Basrawi
Keyword(s):  
Vortex Tube ◽  
Free Software ◽  
Simple Device ◽  
Tube Length ◽  
Geometrical Parameters ◽  
Flow Temperature ◽  
Cold Flow ◽  
Different Types ◽  
Spot Cooling ◽  
Cold Gas

A vortex tube is a simple device which works as a refrigerator, also known as Ranque Vortex Tube, Hilsch Vortex Tube, and Ranque–Hilsch vortex tube. It is used to obtain desired hot and cold gas and is widely used for spot cooling in industry. In vortex tube, the effect of geometrical parameters on the cold flow temperature of vortex tube is still unclear, and effect of certain working gas is unidentified. Hence, the objective of this analysis is to determine the effect of length of the vortex tube, cold exit diameter and different working gas. 3 different tube lengths, 3 different cold exit diameters, and 8 different types of gas are used. Simflow, which is free software, is selected to analyse the effect numerically. From the results, it is clear that the optimum tube length, cold exit diameter, and working gas are L = 175 mm, d = 4 mm and helium, respectively.

Development of an Electrohydrodynamic (EHD) Micro Pump for LN2 Spot Cooling

2003 ◽  
Author(s):  
Y. Zhao ◽  
J. Lawler ◽  
P. Foroughi ◽  
M. Ohadi
Keyword(s):  
Liquid Nitrogen ◽  
Experimental Tests ◽  
Cryogenic Cooling ◽  
Electrode Spacing ◽  
Cooling Systems ◽  
Cryogenic Fluids ◽  
Micro Pump ◽  
Spot Cooling ◽  
Commercial Applications ◽  
Novel Concept

Cryogenic cooling systems play increasingly important roles in both military and commercial applications. These systems are essential for the operation of superconducting electronics and sensors. The development of innovative cryogenic cooling solutions to replace the traditionally bulky, complicated, and less efficient devices that rely solely on heat conduction is becoming more and more attractive. Spot cooling is a novel concept for cryogenic cooling systems. However, spot cooling devices require a compact, efficient and reliable pump that can pump cryogenic fluids. This paper presents preliminary efforts on developing a micro pumps for cryogenic cooling of certain specialty electronics, including those of sensor and detector applications. A packaging method compatible with cryogenic applications is proposed. The tested micro pump, fabricated by MEMS techniques, had a saw-tooth emitter and planar collector with 50-μm electrode spacing and 200-μm pair spacing. The pump was tested in sub cooled liquid nitrogen (with about 7 K sub cooling). It was shown by the experimental tests that liquid nitrogen is pumped by the EHD effects if the electrodes of the pumps are properly designed. The tested micro pump pumped liquid nitrogen at a flow rate of 2.3 g/min and had an output pumping head of 5 Pa when 1000 volts were applied across the electrodes.

Consumption Criteria and Energy Labeling of Wet Cooling Towers in Iran

2009 ◽  
Author(s):  
B. Sajadi ◽  
P. Sayyadi ◽  
M. H. Saidi
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Statistical Study ◽  
High Energy ◽  
International Standards ◽  
Cooling Towers ◽  
End User ◽  
Cooling Systems ◽  
Different Types ◽  
New Energy

Increasing concerns about global warming and environmental pollution control has pushed the relevant organizations to set regulations and to develop programs for energy saving. In addition, for many high energy using appliances, energy labeling provides the end user with important data to select energy-efficient equipments and encourage the manufacturers to enhance the performance of their productions. In this research, a new energy-saving program for wet cooling towers has been developed. Considering a thermo-hydraulic analysis, a novel Energy Index (IE) has been extracted which takes all aspects of the problem into account. The present index can be used as a proper criterion for energy consumption of wet cooling towers. The required parameters are measured using national and international standards. Based on the experimental-statistical study of a comprehensive range of products, the quantities of acceptable energy consumption criterion and energy rating have been extracted for different types of cooling towers. Administration of such program may lead to considerable energy saving in cooling systems which have major economical and environmental advantages especially in large industries.

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