Coefficient of performance of the refrigeration system was computed for various values of strong and weak solution concentration. A typical schematic of the absorption refrigeration system is given in the figure 4. Absorption refrigeration systems powered by solar energy increasingly attract research interests in the last years. An absorption refrigeration system could be labeled a vaporcompression system, where several of the components of the absorption refrigeration cycle. The test results for the tank temperature are presented in figure 6. The system is designed and tested for various operating conditions using hot water as heat source. Solar absorption refrigeration system using new working fluid pairs article pdf available january 2008 with 4,919 reads how we measure reads. The first evolution of an absorption system began in the 1700s. Solar absorption refrigeration system using new working fluid pairs jasim m. A computer simulation model has been developed to predict the performance of solar absorption refrigeration system using different. Since the invention of absorption refrigeration system, nh 3h 2 o has been widely used. Development of a solar intermittent refrigeration system for. Mathematical model of a vapour absorption refrigeration unit system designers in the design of the most fundamental components.
The article will explain the basic principles of the cycle and applications for its use. Solar absorption air conditioning system of the various air conditioning alternatives shown. Water under low pressure is evaporated from the coils that are to be chilled. In particular, it is possible to find in a relatively crude manner the solar panel area required for a certain refrigeration effect given the relevant system temperatures. Review of solar absorption refrigeration system using libr and water the solarpowered absorption system consists of four major parts, i.
Innovators at nasas johnson space center have patented a proven, solarpowered refrigeration system that eliminates reliance on an electric grid, requires no batteries, and stores thermal energy for efficient use when sunlight is absent. In both systems, a hot refrigerant is condensed in one location at a higher pressure, and then the pressure is lowered in the evaporator, causing the refrigerant to evaporate. A comprehensive solar powered absorption refrigeration. The building under consideration is a classroom of dimensions 18. Simple diagram of the solar absorption refrigeration system shown in fig. Experimental system of solar adsorption refrigeration with. These components connected by using three parts heat exchanger, two expansion valves and a pump. Jun 04, 2014 advantages of vapour absorption refrigeration system uses low grade energy like heat. Although the initial cost of an absorption system is higher than that of a compression system, operational costs are much lower if waste heat is used. The refrigerant vapor from the generator is divided into two parts. One of them is the rate of heat transfer which is the most important aspect. It is hoped that, this paper should be useful for any newcomer in this. The system uses two coolants, the first of which performs evaporative cooling and is then absorbed into the second.
The vapour absorption refrigeration system utilizing solar energy would generally be more efficient. Alghoul, mohd yusof sulaiman, azami zaharim and ibrahim ahmad abstract absorption refrigeration systems powered by solar energy increasingly attract research interests in the last years. Librwater absorption refrigeration systems have a coefficient of performance cop in the range of 0. This analysis includes both first law and second law of thermodynamics. Introduction to solar cooling systems ced engineering. Describe a single stage vapour absorption refrigeration system with solution heat exchanger. Solar absorption refrigeration system for airconditioning. A simple absorption refrigeration system common in large commercial plants uses a solution of lithium bromide or lithium chloride salt and water. Absorption is the process in which a substance assimilates from one state into a different state. These two states create a strong attraction to make a strong solution or mixture.
Discuss the desirable properties of refrigerantabsorbent pairs for vapour absorption refrigeration systems and list the commonly used working fluids. In this work, a solar collector is also designed to provide required amount of heat energy by the absorption system. Investigation of thermal performance of a solar powered absorption. Advantages of vapour absorption refrigeration system uses low grade energy like heat. Due to the persistent problem, absorption refrigeration systems are used over vapour compression systems to overcome the shortcomings of the later 3. A compressor is added to the traditional absorption refrigeration system to give a new cycle as is shown in fig. An automatic solar tracking device with a parabolic trough was manufactured and applied in the system to improve the efficiency of the solar collector. The vapour compression cycle is described as a workoperated cycle because it uses a compressor that requires work in the form of electrical energy to operate. An absorption refrigerator is a refrigerator that uses a heat source e. The system was designed to produce up to 8 kgday of ice. Refrigeration effect obtained till all ammonia liquid completely vaporize. For this purpose, heat from conventional boiler can be used or waste heat and solar energy.
A small refrigerator operating on the absorption principle with parabolic concentrator collector built. Solar absorption refrigeration system using new working. In this study, thermodynamic analyses for different working fluid pairs are performed. The vapor absorption refrigeration system comprises of all the processes in the vapor compression refrigeration system like compression, condensation, expansion and evaporation. In contrast, the solarpowered refrigeration system developed at johnson space center is environmentally friendly because it eliminates. It was an intermittent system where ammonia and calcium chloride were used as refrigerant and absorbent respectively. Working principle of solar based vapour absorption refrigeration system. Heat of condensation 30 heat of evaporation cooling energy 0 vapor desorption solar regeneration condensation zeolite adsorber vapor water refrigeration evaporation vapor solar thermal energy 150 heat of adsorption 50 fig. Review of solar absorption refrigeration system using libr and water the solar powered absorption system consists of four major parts, i. Solar energy which is most abundant source of energy in india and we have not having efficient technology to tap this energy source into varied application. Pdf solar absorption refrigeration system using new. In this study, a combined waterheating and cooling system based on absorption refrigeration was designed and constructed. Review of solar refrigeration and cooling systems sciencedirect.
Single stage nh3h2o solar absorption refrigeration system. In contrast, the solar powered refrigeration system developed at johnson space center is environmentally friendly because it eliminates. The absorption refrigeration cycle operates on a similar principle as the vaporcompression system. The study of solar absorption airconditioning systems. The proposed cycle consists of a solar tower system with a heliostat field and central receiver cr that has molten salt as the heat transfer fluid, an absorption refrigeration cycle arc, an. Solar airconditioning and refrigeration achievements and. Introduction vapour absorption refrigeration systems vars have a place with the. A new absorption refrigeration cycle using solar energy. The primary aim of the present work is to design an airconditioning system based on vapour absorption cycle that utilizes a renewable energy source for its.
Various researchers stated few factors on which the vapour compression refrigeration system and absorption refrigeration system are compared. The refrigeration capacity of the system the refrigeration capacity of the adsorption system is basically reflected by the temperature decrease of the water tank. In an effort to make this solar refrigeration technology available around the globe, the. In this paper, performance of the fabricated system is.
The system uses two coolants, the first of which performs evaporative cooling and. Considering the destruction of the ozone layer caused by the use of cfcs, absorption. Ammonia is the only refrigerant from inorganic group which was used universally for many applications and still used to great extent at the present. The absorption system is one of the oldest refrigeration technologies. Absorption machines are available with capacities in the range of 101500 tons. During the desorption process, the valve between adsorber and condenser is opened while the other one is closed, so the refrigerant desorbed from adsorber is condensed in the fig. Abstracta solar driven ammonia absorption refrigeration system was designed, constructed and tested. Pdf solar absorption refrigeration system for airconditioning of. The system was evaluated with the ammonialithium nitratewater nh3lino3h2o mixture. The simulation of the system was carried out using engineering equations solver. This heat energy is taken from solar energy which makes this system ecofriendly and sustainable.
Solar absorption refrigeration system for airconditioning of. Objective of investigation the aim of the project is to perform analysis on. Ugc approved journal,ugc approved journal,ugc and issn approved,ugc approved, ugc,ugc, ugc approved journal, ugc approved journal,issue,paper,research,journal,ijirt,international,volume,author,publication,scopus approved journal, scopus, scopus indexed journal, scopus journal, free publication, publish free, free of cost publication, free,internationaljouranl,journal,research,research paper. There are 2 types of solar refrigerators the high tech expensive kind use a solar panel to power a normalfunctioning refrigerator the also technical but less expensive kind uses a coolant heated up by the. A small capacity vapor absorption system was first analyzed and its characteristics at various points were measured. So our primary focus of this project would be utilizing solar energy for design and study. Solar airconditioning and refrigeration achievements. The basic idea of this paper is derived from the solar heating panel installed on the hostel roofs of the institute.
Solar absorption refrigeration system using new working fluid. Chinnappa 1961 investigated intermittent solar refrigeration system theoretical with absorption cycle for ammoniawater and ammonialithium nitrate combinations and compared the results with experimentally. Solar sorption cooling systems for residential applications. In the vapor absorption system the refrigerant used is ammonia, water or lithium bromide. Pdf absorption refrigeration systems powered by solar energy increasingly attract research interests in the last years. Development of a solar intermittent refrigeration system.
Results of simulated performance of this system and the effects of the refrigeration load inlet temperature on the coefficient of performance, cop of the system are given. Absorption refrigeration system provides large potential for reducing heat pollution of the environment. Photovoltaic operated refrigeration cycle solar electric. Absorption system falls into two categories depending upon the working fluid. Solar absorption airconditioning systems muhammad ali, pe member ashrae abstract in hot climates, one energy source abundantly available is solar energy, which could be used to power solar cooling system based on absorption cycle. The adsorption refrigeration system was composed of the adsorption bed, the evaporator, the condenser, the vacuum pump, and the solar trough collector figure 1.
Solar adsorption refrigeration is an option to overtake the drawbacks of the conventional cooling system. Solar absorption refrigeration system for airconditioning of a classroom building in northern india article pdf available october 2015 with 7,473 reads how we measure reads. Design and construction of a continuous solar absorption. Performance analysis of lithiumbromide water absorption. This study proposes an absorption refrigeration system using refrigerant nh 3 and absorbent h 2 o. The main components of the solar absorption refrigeration system are solar thermal collector, an absorber, generator, a condenser, an expansion valve, a heat exchanger and a pump. Performance analysis of lithiumbromide water absorption refrigeration system using waste heat of boiler flue gases 43. This paper describes simple solar powered absorption refrigeration system.
Project report on vapour absorption refrigeration system. The tank temperature changed with time in a nonlinear way. Solar powered vapor absorption refrigeration system using. They designed the following a solar absorption refrigeration system. Selfcirculation absorption system using librwater 747 748 even if the prime energy for an absorption refrigeration system is in the form of 749 heat, some electricity still require d to drive a. Experimental investigation on an absorption refrigerator. Development of a small capacity solar cooling absorption plant. Most, if not all, of the commercially available absorption units use libr and water as the absorbentrefrigerant fluid pair. The water is absorbed by a lithium bromidewater solution.
As being an environmentally friendly refrigeration system, it is powered by solar cells. Solar ammonia absorption refrigerator senior design. The system uses two coolants, the first of which performs evaporative cooling and is then absorbed into the second coolant. Recent developments in solar refrigeration technology a. Most solar cooling systems use absorption chillers 60% in europe, source. Can work on lower evaporator pressures, without affecting the. Final project solar refrigerator diy science fall 2015. Pdf design of solar absorption refrigeration system. Evaporative cooling in vapor absorption refrigeration systems. Solar cooling used for solar air conditioning a clean.
Can work on lower evaporator pressures, without affecting the cop. The primary aim of the present work is to design an airconditioning system based on vapour absorption cycle that utilizes a renewable energy source for its operation. Up to now, the production of the cold conditions is undertaking mainly by the classical way of compression refrigerator cycle. In fact, the absorption cooling cycle was invented before the vapour compression system in the 1850s, but for various reasons, including cost and low efficiency, did not capture the refrigeration market.
C temperatures required for a watercooled ammonia absorption system. The system drives the water off the lithium bromide solution. The absorption system tain domestic applications have moving this was accomplished he extinguished parts reduced to a minimum. Ugc approved journal,ugc approved journal,ugc and issn approved,ugc approved, ugc,ugc, ugc approved journal, ugc approved journal,issue,paper,research,journal,ijirt,international,volume,author,publication,scopus approved journal, scopus, scopus indexed journal, scopus journal, free publication, publish free, free of. The present work provides a detailed thermodynamic analysis of a 10 kw solar absorption refrigeration system using ammoniawater mixtures as a working medium. This immediately opens up options for its application and use, over an electrically. The absorption cycle is referred to as a heatoperated cycle because most of the energy required to operate the cycle is heat energy. Airconditioning is a basic tool to provide human thermal comfort in a building space. Pdf solar absorption refrigeration system using new working. A proven, environmentally friendly solution that eliminates the need for batteries. Comprehensive parametric study of a solar absorption. Development of solar powered vapour absorption refrigeration. Driving heat sources for thermal cooling instead of using electricity, the absorption and adsorption chillers are driven by heat sources. In this system, nh 3 is used as the refrigerant and h 2 o is used as the absorbent.
1230 877 96 197 559 1265 984 1042 371 1193 843 24 147 1329 829 852 1205 1331 802 1410 697 43 1248 1351 1451 1328 499 985 871 626 787 767 66 440 1055