Proposal and 3E (energy, exergy, and exergoeconomic) assessment of a cogeneration system using an organic Rankine cycle and an Absorption Refrigeration System in the Northeast Brazil: Thermodynamic investigation of a facility case study

Souza, Ronelly; Santos, Carlos Antônio Cabral; Ochoa, Álvaro; Marques, Adriano; Neto, J. Leal; Michima, Paula Suemy Arruda

doi:10.1016/j.enconman.2020.113002

Cited by 54 publications

(16 citation statements)

References 61 publications

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“…ORCs can be employed in a wide variety of applications. For instance, Souza et al [39] proposed a combined system comprising an ORC and an Absorption Chiller to meet the electrical and thermal demands of a university building in Brazil. Nami and Anvari-Moghaddam [40] conducted a study to compare the performance between a conventional and an ORC system, both combined with an Absorption Chiller, to recover waste heat in a cement plant in Turkey.…”

Section: Organic Rankine Cyclementioning

confidence: 99%

“…The first one is the number of working hours per year. For all four CHP technologies reviewed in Section 2, it is assumed to be 6000 h/year of work [39]. The second key parameter is the average output (Table 13) for each CHP technology, which indicates a representative output value for the feeding temperature range of each CHP technology.…”

Section: Brief Economic Perspectivesmentioning

confidence: 99%

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A Review of Small–Medium Combined Heat and Power (CHP) Technologies and Their Role within the 100% Renewable Energy Systems Scenario

et al. 2021

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The energy transition towards a scenario with 100% renewable energy sources (RES) for the energy system is starting to unfold its effects and is increasingly accepted. In such a scenario, a predominant role will be played by large photovoltaic and wind power plants. At the same time, the electrification of energy consumption is expected to develop further, with the ever-increasing diffusion of electric transport, heat pumps, and power-to-gas technologies. The not completely predictable nature of the RES is their well-known drawback, and it will require the use of energy storage technologies, in particular large-scale power-to-chemical conversion and chemical-to-power re-conversion, in view of the energy transition. Nonetheless, there is a lack in the literature regarding an analysis of the potential role of small–medium CCHP technologies in such a scenario. Therefore, the aim of this paper is to address what could be the role of the Combined Heat and Power (CHP) and/or Combined Cooling Heat and Power (CCHP) technologies fed by waste heat within the mentioned scenario. First, in this paper, a review of small–medium scale CHP technologies is performed, which may be fed by low temperature waste heat sources. Then, a review of the 100% RE scenario studied by researchers from the Lappeenranta University of Technology (through the so-called “LUT model”) is conducted to identify potential low temperature waste heat sources that could feed small–medium CHP technologies. Second, some possible interactions between those mentioned waste heat sources and the reviewed CHP technologies are presented through the crossing data collected from both sides. The results demonstrate that the most suitable waste heat sources for the selected CHP technologies are those related to gas turbines (heat recovery steam generator), steam turbines, and internal combustion engines. A preliminary economic analysis was also performed, which showed that the potential annual savings per unit of installed kW of the considered CHP technologies could reach EUR 255.00 and EUR 207.00 when related to power and heat production, respectively. Finally, the perspectives about the carbon footprint of the CHP/CCHP integration within the 100% renewable energy scenario were discussed.

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Section: Organic Rankine Cyclementioning

confidence: 99%

Section: Brief Economic Perspectivesmentioning

confidence: 99%

A Review of Small–Medium Combined Heat and Power (CHP) Technologies and Their Role within the 100% Renewable Energy Systems Scenario

et al. 2021

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“…Different waste heat recovery schemes for natural gas engines were presented by Reference [70], based on an ORC coupled with a thermal oil circuit. Reference [71] used natural gas to fuel an ORC + absorption chiller scheme, producing electricity, heat, and chilled water to satisfy the demands of a university building. Other waste heat recovery options have been reported by Reference [72], which encompass direct uses (radiation/convection recuperator, passive air preheater, waste heat boiler, economizer, plate heat exchanger, to name a few) and indirect uses (heat-to-heat conversion, heat-to-cooling conversion, and heat-to-power conversion).…”

Section: Thermodynamic Resultsmentioning

confidence: 99%

“…Wang et al [88] explored a novel cooling and power cycle and identified the vapor generator #1 and solution heat exchanger as possibilities for optimization due to the high r k and low f k . Souza et al [71] proposed a cogeneration system based on the coupling of ORC and an absorption refrigeration system for a university building in Northeast Brazil and verified that further efficiency enhancement actions could be considered for the ORC steam generator.…”

Section: D )mentioning

confidence: 99%

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

et al. 2020

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This study applies the SPecific Exergy COsting (SPECO) methodology for the exergoeconomic assessment of a compact electricity-cooling cogeneration system. The system utilizes the exhaust gases from a 126 hp Otto-cycle internal combustion engine (ICE) to drive a 5 RT ammonia–water absorption refrigeration unit. Exergy destruction is higher in the ICE (67.88%), followed by the steam generator (14.46%). Considering the cost of destroyed exergy plus total cost rate of equipment, the highest values are found in the ICE, followed by the steam generator. Analysis of relative cost differences and exergoeconomic factors indicate that improvements should focus on the steam generator, evaporator, and absorber. The cost rate of the fuel consumed by the combustion engine is 12.84 USD/h, at a specific exergy cost of 25.76 USD/GJ. The engine produces power at a cost rate of 10.52 USD/h and specific exergy cost of 64.14 USD/GJ. Cooling refers to the chilled water from the evaporator at a cost rate of 0.85 USD/h and specific exergy cost of 84.74 USD/GJ. This study expands the knowledge base regarding the exergoeconomic assessment of compact combined cooling and power systems.

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“…Energy analysis only quantifies the work delivered by the system. However, it does not provide information related to the potential ability of a system to deliver work (Souza et al, 2020). The irreversibility must be accounted for during the evaluation of the system ability (Liu et al, 2020).…”

Section: Exergy Analysismentioning

confidence: 99%

Process Systems Engineering Evaluation of Prospective Working Fluids for Organic Rankine Cycles Facilitated by Biogas Combustion Flue Gases

et al. 2021

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The organic Rankine cycle (ORC) has recently emerged as a practical approach for generating electricity from low-to-high-temperature waste industrial streams. Several ORC-based waste heat utilization plants are already operational; however, improving plant cost-effectiveness and competitiveness is challenging. The use of thermally efficient and cost-competitive working fluids (WFs) improves the overall efficiency and economics of ORC systems. This study evaluates ORC systems, facilitated by biogas combustion flue gases, using n-butanol, i-butanol, and methylcyclohexane, as WFs technically and economically, from a process system engineering perspective. Furthermore, the performance of the aforementioned WFs is compared with that of toluene, a well-known WF, and it is concluded that i-butanol and n-butanol are the most competitive alternatives in terms of work output, exergy efficiency, thermal efficiency, total annual cost, and annual profit. Moreover, the i-butanol and n-butanol-based ORC systems yielded 24.4 and 23.4% more power, respectively, than the toluene-based ORC system; in addition, they exhibited competitive thermal (18.4 and 18.3%, respectively) and exergy efficiencies (38 and 37.7%, respectively). Moreover, economically, i-butanol and n-butanol showed the potential of generating 48.7 and 46% more profit than that of toluene. Therefore, this study concludes that i-butanol and n-butanol are promising WFs for high-temperature ORC systems, and their technical and economic performance compares with that of toluene. The findings of this study will lead to energy efficient ORC systems for generating power.

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Proposal and 3E (energy, exergy, and exergoeconomic) assessment of a cogeneration system using an organic Rankine cycle and an Absorption Refrigeration System in the Northeast Brazil: Thermodynamic investigation of a facility case study

Cited by 54 publications

References 61 publications

A Review of Small–Medium Combined Heat and Power (CHP) Technologies and Their Role within the 100% Renewable Energy Systems Scenario

A Review of Small–Medium Combined Heat and Power (CHP) Technologies and Their Role within the 100% Renewable Energy Systems Scenario

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

Process Systems Engineering Evaluation of Prospective Working Fluids for Organic Rankine Cycles Facilitated by Biogas Combustion Flue Gases

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