Exergetic Analysis of an Integrated Tri-Generation Organic Rankine Cycle

Mathkor, Ratha Z.; Agnew, Brian; Al-Weshahi, Mohammed A.; Latrsh, Fathi

doi:10.3390/en8088835

Cited by 24 publications

(17 citation statements)

References 31 publications

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“…where g is the cell efficiency of the inner surface and m is the transmittance of the outer surface. The energy extracted by the hot water passing to the storage tank is expressed as follows (Mathkor et al, 2015)…”

Section: Energy Analysismentioning

confidence: 99%

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Energy and exergy analysis and optimum working conditions of a renewable energy system using a transient systems simulation program

Abu-Hamdeh

Alnefaie

2020

Energy Exploration & Exploitation

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A solar tri-generation system comprises of photovoltaic thermal collectors that are used for the production of electrical power and domestic hot water simultaneously. This study presents the performance analysis of a micro-solar tri-generation system that fulfills the requirements of an off-grid single-family lodging. The main functions of this system include domestic hot water, electrical power, and cooling power production. A set of five photovoltaic thermal panels were modeled together. The electrical power generated was stored in a battery, while the hot water generated was passed through a flow diverting valve. This valve directed some of the hot water to an absorption chiller, while the remaining portion was sent to an insulated thermal storage tank for later use. Energy and exergy analyses were performed to evaluate the extracted energy’s quality and efficiency. The overall thermal energy efficiency achieved was 50.53%. The extracted energy in the form of hot water was 3777.5 W. The electrical power generated was 2984.6 W, which was sufficient for the small single-family lodging. The coefficient of performance of the absorption chiller was found to be 0.6152. The exergy efficiency achieved was 36.88%. The exergy extracted by hot water was 234.3 W, while the electrical exergy generated was 2984.6 W. The exergy extracted during refrigeration was found to be 91.22 W. Furthermore, varying wind speeds and tilt angles affected both the energy and exergy efficiencies. The tilt angle must be kept at less than 45°, and the optimum wind speed was determined to be 35 km/h.

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Section: Energy Analysismentioning

confidence: 99%

“…It should be noted that the exergy of the electrical power was assumed to be equal to its energy. The exergy received by the PVT panel is given by the following equation (Mathkor et al, 2015)…”

Section: Energy Analysismentioning

confidence: 99%

Energy and exergy analysis and optimum working conditions of a renewable energy system using a transient systems simulation program

Abu-Hamdeh

Alnefaie

2020

Energy Exploration & Exploitation

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“…Mathkor et al [24] and Bellos et al [25] have demonstrated the importance of exergetic analysis, when evaluating the performance of the solar-driven Organic Rankine Cycle tri-generation system. Calise et al have applied exergy analysis for the performance evaluation of polygeneration system integrating solar and other renewable sources [26,27].…”

Section: Introductionmentioning

confidence: 99%

Exergo-Ecological Assessment of Waste to Energy Plants Supported by Solar Energy

et al. 2018

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Hybridization of Waste to Energy (WtE) plants with solar facilities can take competing energy technologies and make them complementary. However, realizing the benefits of the solar integration requires careful consideration of its efficiency. To analyse such systems from the point of view of resource efficiency, the pure energy analysis is not sufficient since the quality of particular energy carriers is not evaluated. This work applies the exergo-ecological analysis using the concepts of thermoecological cost (TEC) and exergy cost for the performance evaluation of an integrated Solar-Waste to Energy plant scheme, where solar energy is used for steam superheating. Different plant layouts, considering several design steam parameters as well as different solar system configurations, in terms of area of heliostats and size of the thermal storage tank, were studied. The results for the solar integrated plant scheme were compared with the scenarios where superheating is performed fully by a non-renewable energy source. The presented results of exergy cost analysis indicate that the most favorable system is the one supported by non-renewable energy. Such an analysis does not consider the advantage of the use of renewable energy sources. By extending the system boundary to the level of natural resource and applying the thermoecological cost analysis, an opposite result was obtained.

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“…Operation of the absorption refrigeration systems with solar heat was studied by [7,[9][10][11][12][13][14], and operation with waste heat recovery was studied by [15][16][17][18]. However, literature on biomass driven absorption cooling is scarce.…”

Section: Introductionmentioning

confidence: 99%

Computational Model of a Biomass Driven Absorption Refrigeration System

Mbikan

Al‐Shemmeri

2017

Energies

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Abstract:The impact of vapour compression refrigeration is the main push for scientists to find an alternative sustainable technology. Vapour absorption is an ideal technology which makes use of waste heat or renewable heat, such as biomass, to drive absorption chillers from medium to large applications. In this paper, the aim was to investigate the feasibility of a biomass driven aqua-ammonia absorption system. An estimation of the solid biomass fuel quantity required to provide heat for the operation of a vapour absorption refrigeration cycle (VARC) is presented; the quantity of biomass required depends on the fuel density and the efficiency of the combustion and heat transfer systems. A single-stage aqua-ammonia refrigeration system analysis routine was developed to evaluate the system performance and ascertain the rate of energy transfer required to operate the system, and hence, the biomass quantity needed. In conclusion, this study demonstrated the results of the performance of a computational model of an aqua-ammonia system under a range of parameters. The model showed good agreement with published experimental data.

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Exergetic Analysis of an Integrated Tri-Generation Organic Rankine Cycle

Cited by 24 publications

References 31 publications

Energy and exergy analysis and optimum working conditions of a renewable energy system using a transient systems simulation program

Energy and exergy analysis and optimum working conditions of a renewable energy system using a transient systems simulation program

Exergo-Ecological Assessment of Waste to Energy Plants Supported by Solar Energy

Computational Model of a Biomass Driven Absorption Refrigeration System

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