Energy, exergy, and economic analysis of an innovative hydrogen liquefaction cycle integrated into an absorption refrigeration system and geothermal energy

Faramarzi, Saman; Gharanli, Sajjad; Ramazanzade Mohammadi, Mohsen; Rahimtabar, Amin; J. Chamkha, Ali

doi:10.1016/j.energy.2023.128891

Cited by 22 publications

(2 citation statements)

References 31 publications

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“…In Figure 3, refrigerant (liquid ammonia) enters the evaporator (2) and evaporates to produce cooling. The refrigerant vapor leaves the evaporator at a low pressure (3) and the compressor increases this pressure to the intermediate pressure in the absorber (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21). Due to this factor, the cycle contains three different pressure levels, allowing the compressed vapor (21) to improve the absorption.…”

Section: Description Of Systemsmentioning

confidence: 99%

Exergoeconomic based comparative analysis between NH3-NaSCN single effect absorption cycle, combined compression-absorption refrigeration and combined ejector-absorption refrigeration cycles powered by solar panel

Rabiei,

Borji,

Kazemi

2024

Preprint

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Solar cooling is environmentally friendly and relies on solar energy to meet cooling needs. In recent years, absorption chillers have gained interest as a sustainable alternative to vapor compression chillers using eco-friendly refrigerants. However, a major problem with simple absorption systems is their low coefficient of performance. As a result, researchers are exploring ways to improve their thermoeconomic efficiency. In this research, three different configurations of absorption cycles are compared and analyzed from exergetic and exergoeconomic points of view. These configurations include the simple absorption cycle, the combined ejector-absorption cycle, and the combined compression-absorption cycle, as well as a flat plate solar collector and a storage tank. Ammonia sodium thiocyanate is used as the working solution. In both combined cycles, the absorber operates at intermediate pressure, allowing three pressure levels to be considered. The simulations are carried out using EES software. The results show that the solar collector should be considered more than other components in terms of exergy and exergoeconomic. It is observed that for the same pressure ratio of ejector and compressor, the exergy efficiency of the ejector cycle is slightly higher than that of the compression cycle. Also, in most cases, the results show improved performance in the combined solar compression cycle by increasing the compressor pressure ratio compared to the other cycles. It has also been shown that increasing the pressure ratio of the ejector and compressor improves the exergoeconomic performance of the combined cycles compared to the simple absorption cycle.

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Section: Description Of Systemsmentioning

confidence: 99%

Exergoeconomic based comparative analysis between NH3-NaSCN single effect absorption cycle, combined compression-absorption refrigeration and combined ejector-absorption refrigeration cycles powered by solar panel

Rabiei,

Borji,

Kazemi

2024

Preprint

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“…Neste caso, é importante dispor de fontes de calor com baixos custos, como podem ser as geotérmicas, solar ou calor residual de diferentes processos (Faramarzi et al, 2023;Al-Rbaihat et al, 2024).…”

Section: Introductionunclassified

Rearranjo de sistema de refrigeração industrial por compressão e integração de um sistema híbrido absorção-compressão

Marques,

Pineli,

Silva

et al. 2024

OLEL

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A grande demanda de potência elétrica em sistemas de refrigeração industrial operando por compressão estabelece a necessidade para que estas plantas operem com bom desempenho térmico. Entretanto, devido aos limites nos recursos investidos, às adaptações muitas vezes realizadas com urgência nas instalações de novos componentes, e outras dificuldades técnicas, nem sempre é possível que os sistemas operem nas melhores condições. Por esta razão, a análise de projetos existentes é importante para se verificar possíveis melhorias que podem ser implementadas, sejam estas para evitar o desperdício de energia, ou mesmo para se integrar tecnologias alternativas não convencionais. Neste contexto, este trabalho se propôs a analisar um sistema de refrigeração industrial de um frigorífico adotado como estudo de caso, em que foram realizadas 2 propostas. A proposta 01 refere-se a uma readequação dos componentes e correntes térmicas do sistema para reduzir o consumo de potência. Já a proposta 02 analisou o aproveitamento de calor do vapor saindo da compressão, antes da condensação, para integrar um sistema de absorção. As análises foram realizadas utilizando a Primeira Lei da Termodinâmica a partir dos balanços de massa e energia para cada componente do ciclo e com o auxílio do software Engineering Equation Solver. Os resultados, avaliados por meio de cálculos do coeficiente de desempenho (COP) e da potência elétrica economizada, apresentaram o aumento do COP em 3,1% na proposta 01 e 4,0% na proposta 02, demonstrando que tanto a readequação de correntes térmicas, como a integração do ciclo de absorção podem ser viáveis para melhorar o desempenho e reduzir o consumo de energia elétrica de uma indústria.

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An Innovative Energy Storage System Based on Phase Change Material and Solar Energy Integrated With an Air Handling Unit to Produce Heating and Cooling

Abdollahi,

Faramarzi,

Ranjbar

et al. 2024

Energy Storage

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This study investigates the potential of using phase change material (PCM) in a building using an air handling unit (AHU) assisted by solar energy. To further enhance the system, an energy storage system (ESS) can be considered. Implementing ESS would allow the captured solar energy to be stored efficiently, ensuring a continuous and reliable power source for cooling or heating the air, even during non‐sunlight hours. The air‐conditioned zone is considered to be 220 m2 in which 30 people work for 12 h a day. An energy analysis is conducted to evaluate the performance of the proposed system in terms of energy and exergy loss. The genetic algorithm (GA) method is used to optimize the system. The results indicate that the system, including PCM and solar system, can reduce energy consumption by up to 8.9% compared to conventional AHUs in the hottest month of the year (July). The results indicated that employing PCM leads to a decrease of 124 kWh in heat loss during January and 229 kWh in heat gain during July. Taking into account the beneficial impacts of both PCM and the solar system, the yearly assessment demonstrates a 2.69% reduction in power demand, equating to an energy saving of 679 kWh. Furthermore, PCM in the proposed system can be used in integration with AHUs based on renewable energy systems to store renewable energy for buildings.

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Energy, exergy, and economic analysis of an innovative hydrogen liquefaction cycle integrated into an absorption refrigeration system and geothermal energy

Cited by 22 publications

References 31 publications

Exergoeconomic based comparative analysis between NH3-NaSCN single effect absorption cycle, combined compression-absorption refrigeration and combined ejector-absorption refrigeration cycles powered by solar panel

Exergoeconomic based comparative analysis between NH3-NaSCN single effect absorption cycle, combined compression-absorption refrigeration and combined ejector-absorption refrigeration cycles powered by solar panel

Rearranjo de sistema de refrigeração industrial por compressão e integração de um sistema híbrido absorção-compressão

An Innovative Energy Storage System Based on Phase Change Material and Solar Energy Integrated With an Air Handling Unit to Produce Heating and Cooling

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