Vapor Compression Chiller Research Articles

Design and optimization of a geothermal absorption cooling system in a tropical climate

The electricity required for air conditioning is soaring worldwide. Absorption chillers represent an alternative to classical vapor compression systems, using heat instead of electricity. However, absorption chillers powered by renewable geothermal heat have received little attention so far. This paper introduces a system using a hot geothermal fluid (typically in the range of 80–110 °C) to produce cooling through a single-effect absorption chiller, and Domestic Hot Water (DHW) through a heat exchanger. It considers a hotel located in Martinique, a French Caribbean island. The electric consumption of every subsystem has been thoroughly estimated. The originality of this paper is twice: i) the system is modelled in TRNSYS software considering dynamic conditions, ii) the system undergoes surrogate modelling and multi-objective optimization to minimize both the cost and the CO2 content of the delivered thermal energy. Several scenarios are considered, depending upon the geothermal temperature, mass flow rate, well remoteness, and demand size. The studied system appears to be systematically more expensive than a combination of a classical vapor compression chiller and a boiler for DHW. However, it can significantly decrease the CO2 content of the provided energy, especially in an island where most electricity is generated from fossil fuels. The proximity of the geothermal well and the use of the warm water leaving the absorption generator (here for DHW production) appear to be key factors for system relevance, along with a hotter geothermal fluid (e.g., 110 °C instead of 80 °C).

Energy and exergy analysis with environment benefit of the underground cooling system of the chiller plant

Using an underground heat exchanger as an alternative to a wet cooling tower can offer several benefits, particularly in terms of energy efficiency and environmental impact. Heat exchangers and cooling towers are chosen depending on various factors, such as the application size, local climate conditions, and economics. The purpose of this study is to compare the use of an underground heat exchanger with a wet cooling tower for cooling purposes. The underground heat exchanger and wet cooling tower provide cooled water for vapor compression chillers. The comparison is conducted on technical, economic, and environmental grounds. Research has been conducted in the Mashhad region, where water resources are limited and cooling demands are high during the summer. In this context, Ferdowsi University of Mashhad is selected as a case study. Energy and water consumption are calculated and compared by simulating and modeling both methods of producing cooled water and the refrigeration cycle. However, improving the alternative mode's exergy efficiency was discussed for all system components. The findings reveal that using the underground heat exchanger results in a 14% reduction in energy consumption and eliminates water consumption. The current water-cooled compression chillers consume approximately 1.95 cubic meters of water per square meter of the building daily.

Absorption Chiller Efficiency Increasing at Waste Heat Recovery of Cogen-eration Plants using a Vapor Compression Chiller as a Backup Cold Source

Cooling efficiency in a trigeneration cycles is one of the most frequently problems. A single-stage hot water absorption chiller is a universal solution for the gas engine waste heat utilization. How-ever, trigeneration centers exploitation experience shows the need for a more detailed technical and economic analysis to achieve maximum efficiency of the three-generation cycle. The purpose of this article is to substantiate the use of two-stage absorption cycles increasing the utilization rate of waste gas heat. The study presents the results of assessing the efficiency of using energy resources on the example of a three-generation center with more than 14 years of exploitation experience, including two single-stage absorption chillers (Q0= 0.65 MW each) and a chiller with a screw compressor (Q0= 0.8 MW). A comparison of actual energy consumption with designed indicators was carried out. The influ-ence of external and internal factors on the efficiency of heat recovery from a gas engine in single-stage absorption refrigeration machines with a water-heated generator is considered. The dependence of the change in the average annual cooling coefficient during the calendar year was obtained. Based on the study, proposals were formulated to improve the energy efficiency of refrigeration supply, giving an increase in refrigeration capacity of 6.1% with a commensurate reduction in the load on the screw chiller. The option of using a combined two-stage cycle chiller (type 2) under similar operating conditions showed a COP=1.43, which provides savings of 67.45 MWh of electricity or 5.4%, on an annualized basis (assuming only waste heat is used). Additional advantages of such a cycle include increased accu-racy and stability of maintaining the water temperature at the absorption chiller evaporator due to more flexible adjustment of the temperature of the lithium bromide solution in the high-temperature generator.

Techno-economic analysis and tri-objective optimization of a novel HDH desalination with PVT and vapor-compression chiller for sustainable water supply in remote areas

Desalination is a powerful tool for addressing freshwater scarcity. This study introduces a stand-alone desalination unit based on humidification-dehumidification, photovoltaic-thermal, and vapor-compression chiller technologies for providing sustainable water supply in remote areas. The system is evaluated from both technical and economic perspectives, and three refrigerants (R22, R134a, and R407C) are tested to determine the best option for the vapor-compression chiller. The system is comprehensively modeled using an artificial neural network trained for tri-objective optimization by employing a genetic algorithm. The optimization aims to maximize the freshwater production rate and gain output ratio while minimizing the cost rate. The results indicate that the photovoltaic-thermal unit comprises about 97% of the cost rate. At the optimum point, the freshwater production rates are 43.81 m3/day for R22, 40.56 m3/day for R407C, and 36.65 m3/day for R134a. The cost rates are highest for R407C at 48.04 $/h, followed by R134a at 45.72 $/h and R22 at 43.74 $/h. Similarly, the gain output ratio follows the same order, with R407C having the highest ratio of 1.28, followed by R134a with 1.27 and R22 with 1.24. The study concludes that R407C is the best option in terms of technical, economic, and environmental factors.

Impact of recovery cycles on the cascade hybrid adsorption-vapor compression chillers

This study analyzed a cascade-type hybrid adsorption-vapor compression chiller. This chiller is a combination of an adsorption chiller and a vapor compression chiller, where the amount of energy absorbed in the evaporator of the adsorption chiller is equal to the heat rejected in the condenser of the vapor compression chiller. The study examined three distinct recovery schemes: heat recovery, mass recovery, and a combined heat-mass recovery approach, applied to the hybrid chiller to assess their effect on the chiller's performance and potential energy savings. The study used MATLAB and CoolProp for mathematical modeling, and the model closely aligned with earlier research. The study found that implementing mass recovery significantly improved energy efficiency and coefficient of performance compared to the basic cascade hybrid system. However, heat recovery had a negative impact on the hybrid chiller. Additionally, the study proposed an optimal duration for mass recovery in the hybrid cascade system. This research offers valuable insights into the advantages of using hybrid chiller systems and emphasizes the significance of incorporating heat and mass recovery in their design and functioning.

Energy-efficient indirect evaporative cooler design framework: An experimental and numerical study

A remarkable surge in cooling demand is observed in the last decades. Currently, the cooling market is dominated by mechanical vapor compression chillers which are energy intensive and use harmful chemical refrigerants. Therefore, the current focus of the current research in cooling is the development of unconventional, sustainable cooling systems. In this regard, indirect evaporative coolers have shown significant potential (particularly under hot-dry climates) with high energy efficiency, low cost, water-based sustainable operation, and benign emissions. However, these systems are in the development stage and have not yet been fully commercialized because of certain design challenges. An innovative indirect evaporative cooler is proposed, fabricated, and experimentally tested in this study. Particularly, the study is focused on the development of heat transfer coefficient correlation for the system for commercial-scale design and expansion. This is because the earlier available correlation is based on simple airflow between parallel plates assumption and does not incorporate the effect of the evaporative potential of the system resulting in under/over-estimation of the heat transfer characteristics. The results showed that the proposed system achieved a temperature drop of 20 °C, a cooling capacity of around 180 W, and an overall heat transfer coefficient of up to 30 W/m2K. Moreover, the study presents an experiment-regression-based heat transfer coefficient correlation that satisfactorily captures the effect of outdoor air temperature and airflow rate ratio which are critical in the design of evaporative coolers. The proposed correlation showed a high (±5%) with experimental data thus making it suitable for the future design of IEC systems over assorted operating scenarios.

Experimental Study of the Heat Flow and Energy Consumption during Liquid Cooling Due to Radiative Heat Transfer in Winter

Radiation cooling is a passive energy saving cooling technology. The process of cooling heat transfer liquid due to the combined effect of night radiative cooling and convection of air at negative temperatures (in winter) is studied. The radiator used for cooling was built into the roof of the building. Its radiating plate was made of a steel sheet coated with zinc oxide. In it, heat dissipation was carried out both from the upper and lower sides of the radiating plate. The experimental values of the heat flux ranged from 20 to 80 W·m−2 at a temperature difference between heat transfer liquid and air from 5 to 15 °C and ambient air temperature from −17 to +5 °C. The correctness of the model for calculating the heat flux in winter conditions was confirmed. A theoretical calculation showed that, in winter, the heat flux removed by the radiator will be 15% less than the heat flux in summer. The amount of heat transferred per watt of electrical power of the refrigeration unit reached 8 W·W−1. To keep the refrigeration unit with radiative heat transfer more efficient than in a conventional vapor compression chiller, the heat transfer liquid temperature should be 6 °C above the atmospheric temperature air. The results of the study show that radiative cooling can be used in winter and may be useful for the development of energy-efficient cooling systems for various purposes (air conditioning, industrial cooling systems and fruit storage chambers).

Investigation of the cascade type of hybrid adsorption-vapor compression chiller

A numerical analysis was performed on a hybrid cooling system consisting of an adsorption chiller (ADC) and a vapor compression chiller (VCC) operating in a cascade mode. The system was evaluated for its overall performance and energy savings compared to standalone ADC or VCC cooling systems. The ADC utilizes an RD silica gel/water working pair, while the VCC uses R410A refrigerant. The cooling strategy involves the ADC providing cooling for loads up to 10 kW, with the VCC supporting the ADC when cooling loads exceed 10 kW, up to 15 kW. MATLAB and Refprop were used to model the system, and the results were consistent with prior research. The study examined the effects of adsorption cycle time, hot water temperature, cold water temperature, adsorbent particle size, and intermediate mass flow rate. Additionally, the performance of different adsorbents, including CaCl2 bound to mesoporous silica (SWS-1L) and Ferro-aluminophosphate (FAM-Z01), was compared to RD silica gel. The hybrid system reduced compressor work by 94.57% and 97.69% compared to conventional VCC when the hot water temperature was set to 90 °C, and cold water temperature was set to 26 °C, respectively. The hybrid system achieved the highest energy savings and overall coefficient of performance, with SWS-1L achieving a 91.37% energy savings and a 6.71 coefficient of performance. Therefore, the cascade-type hybrid cooling system is a superior alternative, particularly for cooling loads ranging from 10 kW to 23 kW, offering significant energy savings compared to conventional VCC systems.

Performance comparison and risk assessment of BIPVT-based trigeneration systems using vapor compression and absorption chillers

A building integrated photovoltaic-thermal (BIPVT) system, which generates both electrical and thermal energy, is an encouraging technique to significantly reduce building energy consumption. This paper compares the thermoelectric performance of two BIPVT-based trigeneration systems using vapor compression and absorption chillers for supplying the cooling load of the building. Dynamic simulation of the system performance using TRNSYS shows that the annual electrical solar fraction of the system is on average 6% higher using an absorption chiller in comparison with using a vapor compression chiller; whereas, the annual thermal solar fraction of the system is 27% lower using absorption chiller than that using vapor compression chiller. It is also found that although the electrical energy generation by the two systems is slightly different, the thermal energy generation of the system using a vapor compression chiller is about 5.5% less than that using an absorption chiller, due to the consumption of more thermal energy of the absorption chiller and thus, better cooling of the photovoltaic panels. The deterministic economic analysis indicates that despite the higher coefficient of performance of the vapor compression chiller, the payback time of the system with the absorption chiller is 4 years lower than that with the vapor compression chiller, in which the hot water generated by the system in warm months is useless. The stochastic economic analysis based on the Monte Carlo algorithm shows that the probability of the net present value of the system with an absorption chiller and a vapor compression chiller is 98.42% and 70.83%, respectively. The probability of the internal rate of return of the system with an absorption chiller and with vapor compression is also 24% and 20%, respectively. All indicators show that using the absorption chiller in the proposed trigeneration system is far less risky than using a vapor compression chiller.

Process Cooling Market in Europe: Assessment of the Final Energy Consumption for the Year 2016

This study analysed one of Europe’s most unexplored energy fields: process cooling (PC). The work assessed the final energy consumption (FEC) for PC of the European Union (and United Kingdom) with a 2016 baseline. An extensive literature review of datasets and journal papers was performed to address knowledge gaps by creating a high-quality dataset with factual accuracy, reliability, and completeness. Installed cooling units, equivalent full load hours, energy efficiency levels (seasonal energy performance ratio), and capacities installed were the essential investigated parameters to perform the FEC calculations. The latter were referred to as vapour compression (VC) chillers (air-to-water or water-to-water). Overall, the results of the EU (plus UK) FEC for the PC sector resulted in more than 110 TWh/year, accounting for around 10% of the total energy consumption for electricity in Europe. It is worth mentioning that several non-VC technologies are utilized for PC purposes in various sectors and subsectors primarily in the industry and the tertiary sectors, which are rapidly growing and, therefore, their cooling consumption is increasing. The current research paper aimed to raise awareness of the PC sector by supporting the European Union policies toward a more sustainable and decarbonized industry in the upcoming decades.

A New Approach to Air Conditioning System Using the Photovoltaic System in Combination With Electricity – Driven Heat Pump and Vapor Compression Chiller

Solar cooling systems have the benefit of the correlation between hours of cooling demand and the availability of solar radiation which can help to minimize electricity usage in buildings. Cooling and/or heating are the major requirements in houses, depending on local climatic conditions and construction style. As well as the impacts of global warming and climate change, air conditioning and refrigeration demands have risen. The development of cooling by using green energies, such as solar panels, is also a crucial solution for electricity and environmental problems. In this research, a solar air conditioning system using pv- vapor compression chiller is proposed. The objectives of this research is to design a system structure to reduce the energy consumption and electricity bill, investigate the performance of the proposed structure through simulation software, implement a hardware prototype based on the proposed design, and to evaluate the simulation and implementation data to validate the experimental results. Finally the data will be validating by the results from other works and simulation as well. DOI: 10.7176/JETP/13-1-04 Publication date: January 31 st 2023

Design optimization of a novel cryo-polygeneration demonstrator developed in Singapore – Techno-economic feasibility study for a cooling dominated tropical climate

The global growth in demand for space cooling is becoming a pressing and critical energy issue potentially having a major impact on the electricity system and the environment. Due to their capabilities to efficiently provide multiple energy services (i.e. mainly electricity, cooling and heat) for urban districts like universities and hospitals, decentralized polygeneration systems can significantly contribute to tackle this issue with several energetic, economic and environmental benefits. Indeed, their impact on both energy efficiency and emissions reduction might be disruptive especially in urban districts located in a tropical region, where the cooling demand is approximately stationary throughout the whole year. Often overlooked by current studies, a systematic and generalized research with an on-site real application on the decarbonization in tropical climate by means of decentralized polygeneration systems is still lacking. This study investigated the techno-economic and environmental benefits of renewable energy sources, storage units and time-varying loads (electricity and cold) on the performance of a real project, i.e. a novel cryo-polygeneration system in a cooling dominated environment. Expected to be in operation in 2023 at the NTU campus located in Singapore, the system is designed to become the first showcase of systems integration that can be exported overseas as an urban solution for tropical climate. Diverse design scenarios and case studies (university and commercial buildings) were firstly dynamically modeled in TRNSYS environment and subsequently optimized in GenOpt software to determine the optimal size of critical components such as gas turbine, absorption chiller, vapour compression chiller, cold thermal energy storage and solar PV units with electrical energy storage as well as the impact of different load profiles on the techno-economic and environmental analysis. For both case studies the optimal design capacities derived confirms higher efficiency and economic performance than the reference system, i.e., a baseline case scenario where all the demands are supplied by the electricity in a grid connected environment. Indeed, the results show that the cryo-polygeneration systems including both renewables and cold thermal energy storage achieve more than 38% and 40 % total annualized cost savings and up to 19 % CO2 reduction, when compared to the baseline case scenario. The main outcomes are of great interest to academia and industry and contribute significantly to developing an efficient, cost-effective and environmentally friendly decentralized cryo-polygeneration system.

Technical and environmental performance of a solar/gas driven absorption chiller using NH3/LiNO3

This study deals with the evaluation of the technical and environmental operation of solar/gas driven NH3/LiNO3 absorption chillers for malls under the environmental conditions of the city of Barranquilla, Colombia. It involves a sensitivity study on the absorption chillers performance at chilled water temperatures of 12 °C and 6 °C and different solar irradiations. It also includes the share of cooling and CO2 equivalent emissions provided by the absorption chillers considering as a base case the energy consumed by the mechanical vapour compression chillers operating in three selected malls. Results showed that solar energy could provide around 40% and 50% of the total energy required to drive the absorption chillers on a service day. This value could be increased by adding a higher solar panel area, however, the available roof area for solar equipment was a limiting factor. Moreover, the COP and SCOP of the absorption chillers were found up to 0.64 and 0.44, respectively. Additionally, the solar/gas driven absorption chillers could cover up to 83%, 100%, and 35% of the peak cooling requirements in malls 1, 2, and 3, respectively, while providing the highest reductions in CO2 equivalent emissions.

Dynamic simulation of hydrogen-based off-grid zero energy buildings with hydrogen storage considering Fanger model thermal comfort

In this study, some locations with different climates, off-grid zero energy buildings with hydrogen energy storage systems are designed, and transient analysis is conducted. These considered buildings supply their electricity consumption without using the electrical grid and PV panels or wind turbines. Also, they supply thermal comfort to occupants by using a vapor compression chiller and humidifier. Domestic hot water of occupants is supplied using solar collectors. For analyzing building's performance and objectives achievement, TRNSYS software is used. Also, for evaluating occupant thermal comfort, the Fanger model is used. The considered building is a one-story building with a 150 m2 area. Four occupants are considered. Both of them are seated at rest, and another is seated with light working such as typing. Using the Fanger model equation and MATLAB software, the thermal comfort of occupants is determined. For domestic hot water consumption, verified profiles that vary during 24 h of the day are considered. Achieved results show that for humid and cold cities, PV panels with an area of 73 and 76 m2 can be supplied the required electricity of considered building with four occupants and battery state of charge is higher than 50% and 10%, respectively. Moreover, with a suitable air conditioner system, the predicted percentage of dissatisfied (PPD) can be lower than 12% and 8% for humid and cold cities. Therefore, the building can be converted to a zero-energy building using its rooftop area.

Thermo-economic analysis of absorption-compression hybrid cooling systems with parallel subcooling and recooling for small scale low-grade heat source and low temperature application

The consumption of low temperature refrigeration systems goes up dramatically due to the fast development of cold chain. In this regard, developing the absorption-compression hybrid cooling systems and employing the low-grade heat to save the compressor work is effective to address the above-mentioned issue. However, one of the main obstacles associated with such solution lies in small scale heat source vs. large heat consumption, which remarkably lowers the amount of energy saving. Consequently, a novel layout, absorption-compression hybrid cooling system with parallel subcooling and recooling, is proposed to deal with the above-mentioned problem. Comparative study is performed to display the advantage of the proposed facility at first. Subsequently, exergy analysis and parametric analysis of the proposed layout are implemented to derive design and operation criteria. Finally, the economic analysis of proposed system is carried out to assess the feasibility. It is found that the compressor power of the novel system is 9.3% and 10.45% less than that of two-stage vapour compression chiller and absorption-compression cascade layout, respectively. Moreover, the payback period of proposed layout is 3.67 years. The paper is favorable to enhance the energy saving of refrigeration system which is associated with small scale low-grade heat source and low temperature application.

Performance analysis of double effect solar absorption cooling system with different schemes of hot/cold auxiliary integration and parallel-serial arrangement of solar field

Energy consumption of heating and/or cooling auxiliary devices in solar sorption cooling systems is one of the major factors of reduction in primary energy savings. This work simulates and analyzes the dynamic operation of a solar thermal double effect absorption cooling system for three strategies of employing hot and/or cold auxiliary devices and the influence of instituting the entire solar collector field in series versus parallel arrangement. An auxiliary heater is installed in the hot storage to absorption chiller loop in configuration-1 (C-1) to maintain the desired generator temperature. An auxiliary cooler is employed in configuration-2 (C-2) to furnish the cooling load in conjunction with an absorption chiller energized only by the evacuated tube solar collector (ETC). In configuration-3 (C-3) both auxiliary heater in the storage to chiller loop and auxiliary cooler in the chiller to load loop are modeled for three percentage contributions of the required cooling load by the double effect absorption and water-cooled vapor compression chiller i.e., 50-50 (C-3a), 70–30 (C-3b), and 30–70 (C-3c), respectively. Simulation results demonstrated that at lower collector areas C-2 resulted in considerably higher primary energy savings (∼58%) and solar fraction (∼14.4%) in comparison to C-1 and C-3. The serial connection of the entire solar field resulted in better primary energy savings in C-2 while for C-1 and C-3 parallel arrangement gave rise to higher primary energy savings than the serial arrangement.

Experimental Characterization of a Three-Dimensional-Printed Adiabatic Desorber for Absorption Chillers

Absorption chillers are bulkier and more expensive than vapor compression chillers (especially for the low-capacity applications). One of the stumbling blocks is their on-demand fabrication and the complexity of their sorption elements (multifunctional exchangers with coupled heat and mass transfers). Adiabatic sorption exchangers (i.e., absorbers and desorbers) have recently been studied with a focus on enhancing the mass transfer phenomenon and allowing for the heat transfer to be performed in compact mass-manufactured heat exchangers. The present work provides the experimental characterization, by a concept of mass effectiveness, of a three-dimensional-printed adiabatic falling film mass exchanger for absorption chillers operating in desorption mode with the H2O-LiBr working fluid. The impact of four parameters was analyzed: the operating pressure, the solution mass flow rate, the solution concentration, and the solution equilibrium deviation temperature. For the tested experimental domain, the desorber can provide an equivalent cooling capacity (in a single-stage chiller) of between 0.32 and 4.74 kW with an effectiveness in the range of 69.5–100%. The presented desorber showed very good performances while having the advantages of a negligible solution pressure drop, high robustness, as well as easy and potential low-cost manufacture.

Energy, Exergy, Environmental and Economic Analysis of Heavy Duty Vapor Compression Chiller with Alternative Fluids in District Cooling

A district cooling system (DCS) is superior to conventional air conditioning as it helps to reduce energy consumption and protect the environment by reducing carbon dioxide emissions. The investigation of the actual/existing vapour compression refrigeration (VCR) system used in the DCS has not been well documented. In this context, energy, exergy, environmental and economic (4E) analysis of the VCR chiller, operated with R134a, used in heavy duty existing DC plant has been systematically performed and compared with the ecofreindly refrigerant R717. The impact of the evaporation temperature on the total equivalent warming impact (TEWI), coefficient of performance, exergy efficiency and cost rate is assessed. It is observed that the COP and exergy efficiency of the VCR with R717 is around 3 % higher compared to a VCR with R134a. This is attributed to the significantly higher latent heat of evaporation, which ultimately requires a lower mass flow rate of R717. It is observed that the total global warming impact and Combined cost of R717 are lower by 1.6 % compared to the R134a. Lower TEWI is attributed to the zero global warming potential, lower compressor power and higher COP of the VCR system with R717 in comparison to R134a. However, further detailed parametric analysis considering the capital cost is required to claim the superiority of R717.

ENERGY AND ENVIRONMENTAL ANALYSIS OF SOLAR AIR COOLING WITH 2-STAGES ADSORPTION CHILLER IN JORDAN

The objectives of this study are to examine the use of the technology of Cooling Air by Solar Energy (CASE), which is used in air-conditioning applications to minimize the consumption of energy, as well as minimize CO2 emissions. The study also aims at providing an overview of different CASE technologies and analyzing the environmental feasibility of selected CASE technologies in Jordan. The methodology used involves a field study of one of the CASE technologies, which has been designed and developed in Jordan, to determine its technical feasibility. The environmental feasibility study has been done on the device used in this work in four scenarios. The results of the analysis of both energy and environmental feasibility have shown that the use of the CASE technology reduces greenhouse gases compared with Vapor Compression Chillers (VCC) that use electricity.Keywords: solar air-cooling; vapor compression chillers; greenhouse gases; energy analysisJEL Classifications: P18, Q40, Q43, Q51DOI: https://doi.org/10.32479/ijeep.11701

USING ADSORPTION CHILLER IN SOLAR COOLING: ECONOMIC BENEFITS FOR JORDAN

Jordan has been facing a rigorous economic problem related to the high cost of energy. One of the main reasons is the cost of subsiding imported fuels to produce electricity for its domestic uses. The importation of energy represents more than 10% of its Gross Domestic Product (GDP) despite it has plentiful resources of renewable energy that can cover all its needs from electrical energy, while the national resources of energy in Jordan cover only 3-4% of the country's energy needs. This study investigates the potential of using the technology of Cooling Air by Solar Energy (CASE) for Air-conditioning applications to minimize the consumption of energy in Jordan. The main objectives of this work are to provide an overview of different commercially available CASE technologies and analyze the economic feasibility of selected CASE technology. The study of the economic feasibility has been done on the CASE technologies used for four scenarios. Analysis of data collection and assessment of economic viability in comparison to conventional VCC was also investigated. The results showed the relevance of the economic feasibility with the cost of electricity tariff, it also showed that the use of this device is feasible at a high electricity tariff; while there is a high risk on feasibility at a low electricity tariff.Keywords: adsorption chillers; vapor compression chillers; economic feasibilityJEL Classifications: C54, Q20, Q43, Q55DOI: https://doi.org/10.32479/ijeep.11752