Energetic and exergetic study of a 10RT absorption chiller integrated into a microgeneration system

Ochoa, Álvaro; Dutra, José Carlos Charamba; Guerrero, Jorge Recarte Henriquez; Rohatgi, Janardan

doi:10.1016/j.enconman.2014.08.064

Cited by 29 publications

(20 citation statements)

References 55 publications

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“…An excellent ally in achieving this was found to be energy cogeneration, which seeks to produce steam, and hot, cold and chilled water by recovering combustion gas from turbines and generators (Maraver, Uche, & Royo, 2012;Ochoa, Dutra, Henríquez, & Rohatgi, 2014b). Giving value to how to consume energy more rationally has prompted the search for techniques that optimize primary resources, thereby increasing the overall efficiency of power generation systems since various energy applications in the industrial area, as well as in the commercial or residential sectors, may be met from a single source (Ortiga, Bruno, & Coronas, 2011; Acta Scientiarum.…”

Section: Introductionmentioning

confidence: 99%

“…This is then converted into another source of energy that may well increase the availability of the thermal and electric energy to meet demand, and hence increase the overall efficiency of the plant (Çakir, Çomakil, & Yuksel, 2012;Armanasco, Colombo, Lucchini, & Rossetti, 2012). Thus, absorption refrigeration systems can use energy recovered from flue gases to activate themselves, which leads to decreasing the consumption of electricity for air conditioning and refrigeration processes (Liang et al, 2013;Ochoa et al, 2014b). Moreover, recovery boilers can be used to generate steam for industrial processes without burning additional fuel, thereby increasing the overall efficiency of the system (Morten, 2012;Shnaiderman & Keren, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…It consists of a microturbine with a nominal capacity of 30 kW, a compact heat exchanger, a lithium-bromide-water single-effect absorption chiller with a cooling capacity of 10 RT (tons of refrigeration), and a cooling tower (Ochoa et al, 2014b). Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…Next, this heat is removed by chilled water from the cooling tower. The chilled water produced in the evaporator of a single-effect LiBr-H 2 O absorption chiller can reach values of between 7 and 12°C, depending on the temperature of the hot water supplied (Ochoa et al, 2014b).…”

Section: Introductionmentioning

confidence: 99%

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<b>Techno-economic and Exergoeconomic Analysis of a micro cogeneration system for a residential use

Ochoa¹,

Dutra²,

Guerrero³

et al. 2016

Acta Sci. Technol.

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ABSTRACT. The aim of the study is to present an economic analysis of a micro cogeneration system using financial analysis (energy view) and exergoeconomic analysis (exergy view). This system uses a natural gas-fueled 30 kW microturbine to generate electricity, and to produce hot water by recovering energy from the waste heat in the exhaust gases by using a heat exchanger, which serves as the drive source of an absorption chiller with a nominal capacity of 35 kW. In the financial analysis economic indicators such as payback, net present value and internal rate of return were used to verify the economic feasibility of this system, while in the exergoeconomic analysis, the Theory of Exergetic Cost was used to determine the exergetic monetary costs. A thermodynamic model was developed on the EES-32 (Engineering Equation Solver) platform. On applying the financial analysis, the results showed that the micro cogeneration system is feasible with positive values of R$ 206,540.00 for NPV, 27% IRR and a 6-year payback. Based on the exergoeconomic analysis, the cogeneration system is also feasible since the monetary cost of the electricity is lower than that charged by the electricity company but this is only possible after the 5 th year.Keywords: net present value, IRR, payback, exergetic costs.Análise Tecno-econômica e Exergoeconomica de um sistema de microcogeração de para uso residencial RESUMO. Este trabalho tem como finalidade o estudo econômico de um sistema de microcogeração de energia utilizando a análise financeira (visão energética) e a análise exergoeconômica (visão exergética). Este sistema utiliza gás natural como combustível primário para o acionamento de uma microturbina de 30 kW para produzir eletricidade, e água quente pelo do reaproveitamento da energia do calor residual dos gases de escape por meio de um recuperador de calor, que serve como fonte de acionamento de um chiller de absorção de 35 kW de capacidade nominal. Na análise financeira foram utilizados os indicadores econômicos tais como: o payback, o valor presente liquido, e a taxa interna de retorno, para verificar a viabilidade econômica do sistema de microcogeração, enquanto na análise exergoeconômica, foi considerada a teoria de custos exergéticos para a determinação dos custos monetários exergéticos. Foi desenvolvido um modelo termodinâmico na plataforma EES-32 (Engineering Equation Solver). Da aplicação da análise financeira os resultados mostraram que o sistema de microcogeração é viável com valores positivos de R$ 206.540,00 de VPL, 27% de TIR, 6 anos de retorno do capital. A partir da análise exergoeconômica, o sistema de cogeração também mostrou-se viável já que o custo monetário da eletricidade é menor do fornecido pela companhia de eletricidade, mas isso é possível após o 5º ano.Palavras-chave: valor presente liquido, TIR, payback, custos exergéticos.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

<b>Techno-economic and Exergoeconomic Analysis of a micro cogeneration system for a residential use

Ochoa¹,

Dutra²,

Guerrero³

et al. 2016

Acta Sci. Technol.

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show abstract

“…Modeling and numerical simulation are widely used to predict the behavior and efficiency of ARSs as a single component (Rabah, 2010;Somers et al, 2011;Ochoa, Dutra, Henríquez, & Santos, 2016), as well as in cogeneration systems (Moya et al, 2011;Ochoa, Dutra, Henríquez, & Rohatgi, 2014) and solar energy systems (Edem, Le Pierrès, & Luo, 2012;Ozgoren, Bilgili, & Babayigit, 2012).…”

Section: Introductionmentioning

confidence: 99%

<b>Energetic analysis of a commercial absorption refrigeration unit using an ammonia-water mixture

et al. 2017

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ABSTRACT. The ROBUR ® absorption refrigeration system (ARS), model ACF60, with a capacity of 17.5 kW, is tested, modeled and simulated in the steady state. To simulate the thermal load a heating system with secondary coolant was used, in which a programmable logic controller (PLC) kept the inlet temperature EVA at around 285.15 K. The mathematical model used was based on balancing the mass, energy and ammonia concentrations and completed by closing equations such as, Newton's cooling equation. The mathematical model was implemented using the Engineering Equation Solver -EES ® . The results obtained after modeling and a numerical permanent simulation are studied using the Duhring diagram. Potential points of internal heat recovery are visualized, and by using graphs of the binary mixture, it is possible to identify the thermodynamic states of all monitored points. The data obtained in the numerical simulation of the ARS was compared with data acquired in the actual tests of the ARS with the ROBUR ® apparatus.

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Energy, exergy, economic analysis and optimization of single-effect absorption chiller network

Panahizadeh

Hamzehei

Farzaneh–Gord

et al. 2020

J Therm Anal Calorim

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Energetic and exergetic study of a 10RT absorption chiller integrated into a microgeneration system

Cited by 29 publications

References 55 publications

<b>Techno-economic and Exergoeconomic Analysis of a micro cogeneration system for a residential use

<b>Techno-economic and Exergoeconomic Analysis of a micro cogeneration system for a residential use

<b>Energetic analysis of a commercial absorption refrigeration unit using an ammonia-water mixture

Energy, exergy, economic analysis and optimization of single-effect absorption chiller network

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