Optimal design and operation of thermal energy storage systems in micro-cogeneration plants

Pérez-Iribarren, Estibaliz; González-Pino, I.; Azkorra-Larrinaga, Zaloa; Gómez-Arriaran, Iñaki

doi:10.1016/j.apenergy.2020.114769

Cited by 21 publications

(6 citation statements)

References 38 publications

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“…Ex D = Ex F − Ex P (8) The product of the specific cost of fuels (c f ) by the exergy destroyed in the equipment (Ex D ) is the cost of the exergy destroyed ( . C D ):…”

Section: Exergoeconomics: Application Of the Speco Methodsmentioning

confidence: 99%

“…Compact combined cooling and power systems, which couple a combustion engine or gas turbine to an absorption refrigeration system, are considered a suitable alternative to single-generation systems [1,2]. This arrangement can also be referred to as compact electricity-cooling cogeneration systems, and has been applied to industries [3,4], the tertiary sector [5][6][7] such as in supermarkets and shopping centers, and also to meet the domestic energy demands of residential buildings [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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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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“…Ex D = Ex F − Ex P (8) The product of the specific cost of fuels (c f ) by the exergy destroyed in the equipment (Ex D ) is the cost of the exergy destroyed ( . C D ):…”

Section: Exergoeconomics: Application Of the Speco Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

et al. 2020

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“…Cogeneration facilities are designed to supply the user's thermal energy demand and to provide electricity as a secondary energy source [15]. Industrial-scale CHPs use the heat directly, but residential-scale CHPs require a thermal energy storage system (TES) to manage the energy demand avoiding system oversizing [12,34]. Because of this, two simplifications have been assumed for the simulation analysis.…”

Section: Simulation Algorithmmentioning

confidence: 99%

“…Proper management would require of an energy storage system. Electrical energy storage (EES) improves the self-consumption ratio for small CHP units [11] and thermal energy storage (TES) eliminates system oversize and also optimizes the use of produced energy [12]. All the CHP units considered in this paper will integrate both EES and TES systems.…”

Section: Introductionmentioning

confidence: 99%

Novel Use of Green Hydrogen Fuel Cell-Based Combined Heat and Power Systems to Reduce Primary Energy Intake and Greenhouse Emissions in the Building Sector

et al. 2021

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Achieving European climate neutrality by 2050 requires further efforts not only from the industry and society, but also from policymakers. The use of high-efficiency cogeneration facilities will help to reduce both primary energy consumption and CO2 emissions because of the increase in overall efficiency. Fuel cell-based cogeneration technologies are relevant solutions to these points for small- and microscale units. In this research, an innovative and new fuel cell-based cogeneration plant is studied, and its performance is compared with other cogeneration technologies to evaluate the potential reduction degree in energy consumption and CO2 emissions. Four energy consumption profile datasets have been generated from real consumption data of different dwellings located in the Mediterranean coast of Spain to perform numerical simulations in different energy scenarios according to the fuel used in the cogeneration. Results show that the fuel cell-based cogeneration systems reduce primary energy consumption and CO2 emissions in buildings, to a degree that depends on the heat-to-power ratio of the consumer. Primary energy consumption varies from 40% to 90% of the original primary energy consumption, when hydrogen is produced from natural gas reforming process, and from 5% to 40% of the original primary energy consumption if the cogeneration is fueled with hydrogen obtained from renewable energy sources. Similar reduction degrees are achieved in CO2 emissions.

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“…The feasibility of micro-CHP installations in residential buildings requires a technical and economic viability study, which is closely related to the sizing of devices [8]. In [8], a linear programming model is developed to determine the design and sizing of the micro-CHP unit, auxiliary boiler, and thermal storage unit, considering the optimal operation strategy. The obtained results have shown that the optimal integration and sizing of the micro-CHP components considerably improve the economic, thermodynamic, and environmental results.…”

mentioning

confidence: 99%

A Two-stage Adaptive Robust Model for Residential Micro-CHP Expansion Planning

Hamzehkolaei

Amjady

Bagheri

2021

Journal of Modern Power Systems and Clean Energy

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This paper addresses the planning problem of residential micro combined heat and power (micro-CHP) systems (including micro-generation units, auxiliary boilers, and thermal storage tanks) considering the associated technical and economic factors. Since the accurate values of the thermal and electrical loads of this system cannot be exactly predicted for the planning horizon, the thermal and electrical load uncertainties are modeled using a two-stage adaptive robust optimization method based on a polyhedral uncertainty set. A solution method, which is composed of column-and-constraint generation (C&CG) algorithm and block coordinate descent (BCD) method, is proposed to efficiently solve this adaptive robust optimization model. Numerical results from a practical case study show the effective performance of the proposed adaptive robust model for residential micro-CHP planning and its solution method. Index Terms--Micro combined heat and power (micro-CHP) planning, two-stage adaptive robust optimization model, block coordinate descent method, polyhedral uncertainty set.

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Optimal design and operation of thermal energy storage systems in micro-cogeneration plants

Cited by 21 publications

References 38 publications

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

Novel Use of Green Hydrogen Fuel Cell-Based Combined Heat and Power Systems to Reduce Primary Energy Intake and Greenhouse Emissions in the Building Sector

A Two-stage Adaptive Robust Model for Residential Micro-CHP Expansion Planning

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