Space Cooling Using the Concept of Nanofluids-Based Direct Absorption Solar Collectors

2012 ◽  
Author(s):  
Vivek Vishwakarma ◽  
Nitin Singhal ◽  
Vikrant Khullar ◽  
Himanshu Tyagi ◽  
Robert A. Taylor ◽  
...  
Keyword(s):  
Solar Collector ◽  
Air Conditioning ◽  
Thermal Storage ◽  
Temperate Climate ◽  
Absorption Refrigeration ◽  
Direct Absorption ◽  
Parabolic Trough ◽  
Space Cooling ◽  
Vapor Absorption ◽  
Vapor Absorption Refrigeration

A solar-energy based vapor absorption refrigeration system is potentially an excellent alternative air-conditioning system. However, there are several research challenges to ensure sufficient efficiency and reliability for ensuring widespread implementation. Integration of a parabolic trough solar collector utilizing a mixture of nanoparticles and water with a vapor absorption system has the potential to significantly enhance the efficiency of the system. Such a system makes use of the superior thermo-physical properties of the nanofluid compared to the base fluid. Moreover, the direct absorption phenomenon of solar radiation through interaction with the participating medium (nanofluid) results in a higher temperature rise of the medium in conjunction with higher operating efficiencies as well. At the same time there are certain challenges that need to be identified and addressed in the implementation of this novel concept. For instance, to make it reliable, the system further needs to be integrated with a thermal storage system which facilitates air-conditioning even during non-sunshine hours. Integration of vapor absorption refrigeration technology, parabolic trough with water-nanoparticles mixture as the absorbing medium and a thermal storage facility is the uniqueness of this design which under certain conditions and locations may prove to be an efficient and reliable substitute to the conventional electrical air-conditioning systems. In this particular study a space cooling application for approximately 100 Tons of refrigeration is studied. Hourly variation in sunlight as well as seasonal changes for temperate climate conditions is considered. Parameters such as the cooling load of the space, and waste heat produced by electronics are evaluated. The cooling system driven by the nanofluid-based concentrated parabolic solar collector is mathematical modeled and then the optimization is done by varying the nanoparticle size and volume fraction in order to obtain the best result for collector outlet temperature, thermal efficiency and optical efficiency.

scholarly journals Thermal Examination of Vapour Absorption System using Experimental Design Method

2019 ◽  
Vol 8 (6S) ◽  
pp. 1101-1104
Keyword(s):  
Cooling System ◽  
Industrial Applications ◽  
Heat Transfer Fluid ◽  
Thermodynamic Evaluation ◽  
Absorption Refrigeration ◽  
Parabolic Trough ◽  
Pressurized Water ◽  
Parabolic Trough Collector ◽  
Vapor Absorption ◽  
Vapor Absorption Refrigeration

The experimental investigation has been carried out for 100 kW triple-effect vapor absorption refrigeration systems using parabolic trough collector. The data have been recorded and analyzed for designing a new vapor absorption refrigeration system with process heat for industrial applications for Gurugram regions of India. The solar resources have also been analyzed for designing of the system. The thermodynamic evaluation of 100 kW triple-effect vapor absorption refrigeration systems has analyzed for different parameters. The heat is supplied from solar thermal technology which converts solar radiation to useful heat of the total input energy of the proposed cooling system is taken from the heat transfer fluid through parabolic trough collector (PTC) as per availability of solar insolation at the pressurized water of 140-180 oC supplied to the generator at a mass flow rate of 7 kg/s. It is analyzed that in the month of November radiation drops because of cosine losses as compared to May and Direct Normal Irradiance decreases in the month of December, January, July, August, and September.

scholarly journals Simulation of absorption refrigeration system for automobile application

2008 ◽  
Vol 12 (3) ◽  
pp. 5-13 ◽  
Author(s):  
Anand Ramanathan ◽  
Prabhakaran Gunasekaran
Keyword(s):  
Air Conditioning ◽  
Waste Heat ◽  
Vapor Compression ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Automotive Air Conditioning ◽  
Vapor Absorption ◽  
Vapor Compression Refrigeration ◽  
Absorption Refrigeration System ◽  
Vapor Absorption Refrigeration

An automotive air-conditioning system based on absorption refrigeration cycle has been simulated. This waste heat driven vapor absorption refrigeration system is one alternate to the currently used vapour compression refrigeration system for automotive air-conditioning. Performance analysis of vapor absorption refrigeration system has been done by developing a steady-state simulation model to find the limitation of the proposed system. The water-lithium bromide pair is used as a working mixture for its favorable thermodynamic and transport properties compared to the conventional refrigerants utilized in vapor compression refrigeration applications. The pump power required for the proposed vapor absorption refrigeration system was found lesser than the power required to operate the compressor used in the conventional vapor compression refrigeration system. A possible arrangement of the absorption system for automobile application is proposed.

scholarly journals Monitoring and simulation of parabolic trough collector powered vapor absorption refrigeration system for rural cold storage

2021 ◽  
pp. 298-298
Author(s):  
Divya Selvaraj ◽  
Lalith Nadimuthu ◽  
Kirubakaran Victor
Keyword(s):  
Cold Storage ◽  
Food Storage ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Parabolic Trough ◽  
Parabolic Trough Collector ◽  
Agricultural Produce ◽  
Vapor Absorption ◽  
Absorption Refrigeration System ◽  
Vapor Absorption Refrigeration

India is one of the largest contributors to the world?s agricultural products. The majority of people?s livelihood in India depends on agriculture and its allied sectors. According to an economics survey in the agricultural year of 2019-2020, India is estimated to have produced around 292 million tonnes of food grain. The share of agriculture in India?s GDP is 19.9%. Even though India is an active participant in global agricultural trade, the total agricultural product export is only 2.5%. Agricultural produce is easily perishable and the quality gets affected which will then affect their market value. To meet the future food demands, agricultural produce must be able to store for a longer amount of time for round the year availability. The traditional food storage practices cannot satisfy that condition. These perishables need a proper cold supply chain to increase the shelf life. In this paper performance of a Parabolic Trough Collector Integrated Vapor Absorption Refrigeration system was developed and studied. Renewable integrated cold storage would open door to the sustainable energy future.

scholarly journals Thermal Examination of Vapour Absorption System using Experimental Design Method

2019 ◽  
Vol 8 (11) ◽  
pp. 3507-3510
Keyword(s):  
Cooling System ◽  
Industrial Applications ◽  
Heat Transfer Fluid ◽  
Thermodynamic Evaluation ◽  
Absorption Refrigeration ◽  
Parabolic Trough ◽  
Pressurized Water ◽  
Parabolic Trough Collector ◽  
Vapor Absorption ◽  
Vapor Absorption Refrigeration

The experimental investigation has been carried out for 100 kW triple-effect vapor absorption refrigeration systems using parabolic trough collector. The data have been recorded and analyzed for designing a new vapor absorption refrigeration system with process heat for industrial applications for Gurugram regions of India. The solar resources have also been analyzed for designing of the system. The thermodynamic evaluation of 100 kW triple-effect vapor absorption refrigeration systems has analyzed for different parameters. The heat is supplied from solar thermal technology which converts solar radiation to useful heat of the total input energy of the proposed cooling system is taken from the heat transfer fluid through parabolic trough collector (PTC) as per availability of solar insolation at the pressurized water of 140-180 oC supplied to the generator at a mass flow rate of 7 kg/s. It is analyzed that in the month of November radiation drops because of cosine losses as compared to May and Direct Normal Irradiance decreases in the month of December, January, July, August, and September

EXERGY ANALYSIS OF A LiBr–H2O VAPOR ABSORPTION REFRIGERATION PLANT: A CASE STUDY

2014 ◽  
Vol 22 (02) ◽  
pp. 1450010 ◽  
Author(s):  
SANJEEV ANAND ◽  
ANKUSH GUPTA ◽  
SUDHIR KUMAR TYAGI
Keyword(s):  
Performance Optimization ◽  
Exergy Analysis ◽  
Heat Rate ◽  
Exergy Efficiency ◽  
Exergy Loss ◽  
Absorption Refrigeration ◽  
Actual System ◽  
Evaporator Temperature ◽  
Vapor Absorption ◽  
Vapor Absorption Refrigeration

This communication presents the energy and exergy analysis of an actual double effect steam powered LiBr – H 2 O vapor absorption refrigeration plant. Exergy loss, COP, exergy efficiency and heat rate for each component of the system are calculated. The effect of generator as well as evaporator temperature on the COP and exergy efficiency is evaluated and it is found that the irreversibility rate is highest in the generator while it is found to be the lowest in the case of absorber and condenser. It is also found that the COP of the system increases with the increase in the evaporator temperature while it is found to be reverse in case of exergy efficiency. Results revealed that average exergy loss is highest in the generator as compared to other components. The results obtained are helpful for designers to bring changes in the actual system for performance optimization and less wastage of energy. The study clearly explain the operational and maintenance problems in the machine and point out the areas of energy wastage which the operational engineer should look into for the optimum operation of the plant.

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