Modeling and simulations of fuel cell systems for combined heat and power generation

Kang, Kyung-Sik; Yoo, Haneul; Han, Dong; Jo, Ahrae; Lee, Jun-Hee; Ju, Hyunchul

doi:10.1016/j.ijhydene.2015.11.089

Cited by 16 publications

(7 citation statements)

References 19 publications

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“…PEMFC has a major application in transportation due to its potential impact on the environment, such as the control of greenhouse gases emissions [10]. However, due to its high efficiency and low pollution in comparison with conventional combustion-based power generation technologies, PEMFC is also considered to be a prospective alternative power source for distributed energy or CHP applications [11]. A thermodynamic analysis for a combined cooling, heating, and power (CCHP) system based on PEMFC as a prime mover has been performed, and the results indicated that the energy and exergy efficiencies of the CCHP system are 81.55% and 54.5% [12].…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study and Economic Analysis of a Fuel-Cell-Based CHP System for a Comprehensive Sports Center with an Indoor Swimming Pool

Liu¹,

Kim²,

Shin³

2021

Energies

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Unlike a general commercial building, heating for a building with an indoor swimming pool is highly energy-intensive due to the high energy demand for swimming water heating. In Korea, the conventional heating method for this kind of building is to use boilers and heat storage tanks that have high fuel costs and greenhouse gas emissions. In this study, a combined heat and power (CHP) system for such a building using the electricity and waste heat from a Phosphoric Acid Fuel Cell (PAFC) system was designed and analyzed in terms of its primary energy saving, CO2 reduction, fuel cell and CHP efficiency, and economic feasibility. The mathematical model of the thermal load evaluation was used with the 3D multi-zone building model in TRNSYS 18 software (Thermal Energy System Specialists, LLC, Madison, MI, USA) to determine the space heating demand and swimming pool heat losses. The energy efficiency of the fuel cell unit was evaluated as a function of the part-load ratio from the operating data. The fundamental components, such as the auxiliary boiler, thermal storage tank, and heat exchanger are also integrated for the simulation of the system’s operation. The result shows that the system has a high potential to improve the utilization efficiency of fuel cell energy production. Referring to the local condition of the energy market in Korea, an economic analysis was also carried out by using a specific FC-CHP capacity at 440 kW. The economic benefit is significant in comparison with a conventional heating system, especially for the full-time operating (FTO) mode. The net profit made by comparison with the conventional energy supply system is about 178,352 to 273,879 USD per year, and the payback period is expected to be 6.9 to 10.7 years under different market conditions.

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Section: Introductionmentioning

confidence: 99%

Feasibility Study and Economic Analysis of a Fuel-Cell-Based CHP System for a Comprehensive Sports Center with an Indoor Swimming Pool

Liu¹,

Kim²,

Shin³

2021

Energies

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“…in [11]. A fuel cell generation unit has been optimally designed to be used in a CHP system using a commercial flow-sheet simulator namely ASPEN HYSYS in [12]. Non-dominated sorting genetic algorithm II (NSGA II) has been employed in [13] to optimize generation of a CHP system together with electrical and thermal storage units.…”

Section: Optimal Scheduling Problemsmentioning

confidence: 99%

“…It should be noted that total generated heat by DHW boiler should be within its rated limitation(8). Boiler for space heating A SH boiler directly consumes the purchased gas from gas network and exhaust gas of a gas turbine to generate heating energy for supplying space heating demand and charging SH storage system (11)-(12). It should be noted that total generated heat by SH boiler should be in its nominal range(13).It should be mentioned that exhaust gas of gas turbine cannot be simultaneously consumed by the DHW boiler and the SH boiler.…”

mentioning

confidence: 99%

Optimal robust operation of combined heat and power systems with demand response programs

Majidi

Mohammadi‐Ivatloo

Anvari‐Moghaddam

2019

Applied Thermal Engineering

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Efficiency improvement of generation units with different scales in energy systems has always been considered as an important issue. In conventional power systems, a big share of energy portfolio (40% -60%) could be wasted since generation systems are not capable to efficiently use input energy. One solution to this problem is to incorporate combined heat and power (CHP) systems to form a multi-carrier energy hub and increase energy efficiency. In this paper, an optimization framework is developed for optimal operation of a CHP system in an uncertain environment considering demand response actions. The examined CHP-based energy system is composed of a gas turbine, heat pump, storage systems and boiler units to generate heat for space heating (SH) and domestic hot water (DHW) demands. Robust optimization framework is also employed to determine the true operating mode of CHP system (namely risk-averse, risk-neutral, or risk-taker) in the examined uncertain environment. Furthermore, a time-of-use (TOU) pricebased demand response program (DRP) is used to enhance system's economic operation by changing the energy consumption pattern of end-users during the study period. Simulation results demonstrate that without DRPs, robust operation of CHP-based microgrid is obtained against 30% of more electrical load by experiencing 10.048 % more operation cost while the Highlights  Economic operation of CHP system under demand response concept. Uncertainty-based performance CHP system against electrical load uncertainty. Uncertainty modeling via robust optimization technique. Strengthened robust performance of CHP system under demand response concept.

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“…The most commercially established PEM fuel cell technology is the conventional low temperature PEM fuel cell (LT-PEM FC) (Gandiglio et al, 2014). Several studies have been focused on of LT-PEM FC based CHP system, including studies focused on performance investigation (Ham et al, 2015), parametric study (Kang et al, 2015), and reliability investigation (Wang, 2017) of these units. Other studies have also been dedicated to techno-economic analysis (Hawkes et al, 2009;Napoli et al, 2015), and optimization (Godat and Marechal, 2003;Hubert et al, 2006) of these systems.…”

Section: Introductionmentioning

confidence: 99%

Optimization of an HT-PEM fuel cell based residential micro combined heat and power system: A multi-objective approach

Mamaghani

Najafi

Casalegno

et al. 2018

Journal of Cleaner Production

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Modeling and simulations of fuel cell systems for combined heat and power generation

Cited by 16 publications

References 19 publications

Feasibility Study and Economic Analysis of a Fuel-Cell-Based CHP System for a Comprehensive Sports Center with an Indoor Swimming Pool

Feasibility Study and Economic Analysis of a Fuel-Cell-Based CHP System for a Comprehensive Sports Center with an Indoor Swimming Pool

Optimal robust operation of combined heat and power systems with demand response programs

Optimization of an HT-PEM fuel cell based residential micro combined heat and power system: A multi-objective approach

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