Heat transfer and exergy analysis of a novel solar-powered integrated heating, cooling, and hot water system with latent heat thermal energy storage

Shabgard, Hamidreza; Song, Li; Zhu, Weiwei

doi:10.1016/j.enconman.2018.08.105

Cited by 54 publications

(16 citation statements)

References 31 publications

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“…The second path is connected to the condenser of the heat pump of state points 29 and 4. The temperature difference between the inlet and outlet flow rate of the first (T [2] and T [5]) and second path (T [4] and T [29]) are 12 C and 12 C, respectively, as shown in Figure 10A. This constant temperature difference has caused constant heat transfer for each element of thermal storage, as shown in Figure 10B.…”

Section: Resultsmentioning

confidence: 96%

“…Solar energy is recognized as one of the most viable renewable-based energy sources because it is clean, inexhaustible, affordable, and free from regional restriction and high quality. This energy can be a source of electricity by using photovoltaic solar panels, 3 a source of heat as in solar collectors, 4,5 or both as in photovoltaic thermal (PVT) solar collectors. [6][7][8] Solar panels can be combined with heat pump systems, which is an effective way to exploit the solar energy for air-conditioning residential spaces for both heating and cooling seasons.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic analysis of a hybrid energy system using geothermal and solar energy sources with thermal storage in a residential building

2019

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Residential buildings in Canada require remarkable heating loads in the winter. Many homeowners potentially consider more cost effective and environmentally-benign solutions, including solar energy systems, in order to replace fossil fuels. However, this might not be efficient because many cities are exposed to minimum solar radiation resulting in large surface area of solar panels.Therefore, a hybrid energy system is designed to combine five photovoltaic thermal solar panels, a 300-m geothermal loop, and 9463.53-kg water of phase change material thermal battery storage for a residential building of 325 m 2 total floor space in the city of Oshawa, Canada. The building has maximum heating and cooling loads of 13.8 and 8.7 kW, respectively. A thermodynamic analysis is applied to the system in January and the whole year. It was found that the solar panels can supply thermal energy and electrical power of 8 and 50 W, respectively, in January, while the geothermal and thermal storage energy can provide 16.8 and 9 kW over the year, respectively. The hybrid system requires an additional heating load of 1.85 kW from the furnace. The overall energetic and exergetic coefficient of performance of the system are estimated to be 54.58% and 3.34% in the winter and 42.6% and 4.47% in the summer, respectively. K E Y W O R D S efficiency, energy storage, exergy, geothermal energy, heat pump, photovoltaics, solar energy

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of a hybrid energy system using geothermal and solar energy sources with thermal storage in a residential building

2019

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“…Similar expressions as Equations (27) to (29) can be derived for θ sol , resulting in a quadratic function of C and D:…”

Section: Mathematical Modelmentioning

confidence: 94%

“…The aluminum foam is assumed to have a porosity of 97.7%, creating a PCM-metal foam composite with an effective thermal conductivity of 2 W/m·K. Details of the calculation of the effective thermal conductivity can be found elsewhere [27]. It is noted that this case study did not aim to optimize the design of the PCM-air heat exchanger and is mainly intended to demonstrate the application of the developed model for time-efficient analysis of engineering systems.…”

Section: Applicationmentioning

confidence: 99%

Integral Solution of Two-Region Solid–Liquid Phase Change in Annular Geometries and Application to Phase Change Materials–Air Heat Exchangers

2019

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A mathematical model based on the integral method is developed to solve the problem of conduction-controlled solid–liquid phase change in annular geometries with temperature gradients in both phases. The inner and outer boundaries of the annulus were subject to convective, constant temperature or adiabatic boundary conditions. The developed model was validated by comparison with control volume-based computational results using the temperature-transforming phase change model, and an excellent agreement was achieved. The model was used to conduct parametric studies on the effect of annuli geometry, thermophysical properties of the phase change materials (PCM), and thermal boundary conditions on the dynamics of phase change. For an initially liquid PCM, it was found that increasing the radii ratio increased the total solidification time. Also, increasing the Biot number at the cooled (heated) boundary and Stefan number of the solid (liquid) PCM, decreased (increased) the solidification time and resulted in a greater (smaller) solid volume fraction at steady state. The application of the developed method was demonstrated by design and analysis of a PCM–air heat exchanger for HVAC systems. The model can also be easily employed for design and optimization of annular PCM systems for all associated applications in a fraction of time needed for computational simulations.

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“…A utilização de sistemas de produção de energia a partir de placas fotovoltaicas (KHALID et al, 2016;OURIA, 2019;SADATI;EDWARDS, 2019) e sistemas de turbinas eólicas (KHALID et al, 2016;KRISTIANSEN;MA;WANG, 2019;SHABGARD;SONG;ZHU, 2018;WANG et al, 2017) podem diversificar a matriz energética e reduzir a dependência de energia de fonte hídrica e ou térmica, mitigando os custos com energia elétrica (BELUSSI et al, 2019;SEYAM, 2019). No entanto a utilização de energia solar e eólica ainda é mínima, devido aos altos custos de instalação e a demora quanto ao retorno de investimento (BOBROVA, 2015;MADESSA, 2015;MONTAGNINO, 2017;VIEIRA;MOURA;DE ALMEIDA, 2017).…”

Section: Sustentabilidade Nas Cidades -Energia Elétricaunclassified

Alternativas Para Demanda De Água E Energia Elétrica Para O Município De Governador Celso Ramos

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Magnago

2020

R. gest. sust. ambient.

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A construção de cidades causa impactos negativos ao meio ambiente, porém elas são fundamentais para a sociedade contemporânea, sendo crescente o interesse por ambientes urbanos. Este artigo trata-se de uma análise documental sobre os aspectos de consumo de água e energia elétrica do município de Governador Celso Ramos (SC), Brasil, no período de 2008 à 2017. Os resultados demonstram aumento de consumo de energia elétrica nos anos período em 69,16% para o setor residencial, 99,55% para o setor comercial e 1,68 vezes a mais para o setor industrial e o consumo de água aumentou 17,02% no mesmo período, com influência da sazonalidade. Mitigações como instalação de fontes alternativas de energia, como solar e eólica, e reaproveitamento de água da chuva e de águas cinzas podem ajudar a atender a demanda da população. Ressaltando que ações educativas devem ser adotadas pois a demanda per capita de água e energia elétrica aumentou no período de estudo. Como conclusão evidencia-se a necessidade de ações conjuntas entre prefeitura municipal, iniciativa privada, órgãos governamentais e munícipes a fim de minimizar os impactos que o crescente número de construções no município está proporcionando ao meio ambiente local.

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Heat transfer and exergy analysis of a novel solar-powered integrated heating, cooling, and hot water system with latent heat thermal energy storage

Cited by 54 publications

References 31 publications

Thermodynamic analysis of a hybrid energy system using geothermal and solar energy sources with thermal storage in a residential building

Thermodynamic analysis of a hybrid energy system using geothermal and solar energy sources with thermal storage in a residential building

Integral Solution of Two-Region Solid–Liquid Phase Change in Annular Geometries and Application to Phase Change Materials–Air Heat Exchangers

Alternativas Para Demanda De Água E Energia Elétrica Para O Município De Governador Celso Ramos

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