Life cycle energy and environmental impacts of a solid oxide fuel cell micro-CHP system for residential application

2019 ◽  
Vol 685 ◽  
pp. 59-73 ◽  
Author(s):  
Sonia Longo ◽  
Maurizio Cellura ◽  
Francesco Guarino ◽  
Giovanni Brunaccini ◽  
Marco Ferraro
Author(s):  
Robert J. Braun

A techno-economic optimization study investigating optimal design and operating strategies of solid oxide fuel cell (SOFC) micro-combined heat and power (CHP) systems for application in U.S. residential dwellings is carried out through modeling and simulation of various anode-supported planar SOFC-based system configurations. Five different SOFC system designs operating from either methane or hydrogen fuels are evaluated in terms of their energetic and economic performances and their overall suitability for meeting residential thermal-to-electric ratios. Life-cycle cost models are developed and employed to generate optimization objective functions, which are utilized to explore the sensitivity of the life-cycle costs to various system designs and economic parameters and to select optimal system configurations and operating parameters for eventual application in single-family, detached residential homes in the U.S. The study compares the results against a baseline SOFC-CHP system that employs primarily external steam reforming of methane. The results of the study indicate that system configurations and operating parameter selections that enable minimum life-cycle cost while achieving maximum CHP-system efficiency are possible. Life-cycle cost reductions of over 30% and CHP efficiency improvements of nearly 20% from the baseline system are detailed.


2017 ◽  
Vol 165 ◽  
pp. 312-322 ◽  
Author(s):  
Gabriela Benveniste ◽  
Martina Pucciarelli ◽  
Marc Torrell ◽  
Michaela Kendall ◽  
Albert Tarancón

2021 ◽  
Vol 9 ◽  
Author(s):  
Zheng Dang ◽  
Zhaoyi Jiang ◽  
Jinyan Ma ◽  
Xin Shen ◽  
Guang Xi

In order to solve the environmental pollution problem caused by winter heating of rural residential building in northern of China, in this paper a biomass gasification (BG)-solid oxide fuel cell (SOFC) combined heat and power (CHP) system has been establishedand numerically investigated. Taking a rural village around Xi’an which is an ancient city and located at central of northern China as the study object, according to heat and electricity output of the system and the heating and electrical load characteristics of the residential building of village, the energy saving ratio and economical efficiency of the CHP system under three different operation schemes compared with the traditional energy system have been analyzed. The results show that the operation scheme for heating designated rooms in rural buildings and meeting the average heat demand of users is the most energy-efficient and economical way. The primary energy saving rate and annual cost saving rate can reach 18.0% and 10.3%, respectively. When the user’s heat and power load demand is clear, the closer the system’s output heat and power ratio to the user’s heat and power load ratio, the more significant the system’s energy saving effect.


2013 ◽  
Vol 336-338 ◽  
pp. 695-699 ◽  
Author(s):  
Ying Wei Kang ◽  
Wei Huang ◽  
Yang Xue ◽  
Guang Yi Cao ◽  
Heng Yong Tu

In the past decade, developing solid oxide fuel cell (SOFC) systems for micro combined heat and power applications (micro-CHP, 1-10 kWe) is one of the hot spots in the world energy field. To meet the requirements for system optimization and control design of SOFC micro-CHP systems, in this paper a dynamic model of an SOFC micro-CHP system is developed, based on which dynamic simulations are also carried out. Simulation results show that the present model can reflect the behavior of the SOFC micro-CHP system quite well; the influence of one component on another is an important factor to determine system dynamic behavior; as the system comprises many components and concerns different physical and chemical processes, it has dynamic processes with several kinds of time scales; for the air preheating need, the heat-exchange area of air pre-heater is quite big, which leads to its big thermal inertia, and causes the dynamic process lasting for several ten thousands of seconds.


Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1611 ◽  
Author(s):  
Marta Gandiglio ◽  
Fabrizio De Sario ◽  
Andrea Lanzini ◽  
Silvia Bobba ◽  
Massimo Santarelli ◽  
...  

This work assesses the environmental impacts of an industrial-scale Solid Oxide Fuel Cell (SOFC) plant fed by sewage biogas locally available from a Waste Water Treatment Plant (WWTP). Three alternative scenarios for biogas exploitation have been investigated and real data from an existing integrated SOFC-WWTP have been retrieved: the first one (Scenario 1) is the current scenario, where biogas is exploited in a boiler for thermal-energy-only production, while the second one is related to the installation of an efficient SOFC-based cogeneration system (Scenario 2). A thermal energy conservation opportunity that foresees the use of a dynamic machine for sludge pre-thickening enhancement is also investigated as a third scenario (Scenario 3). The life cycle impact assessment (LCIA) has shown that producing a substantial share of electrical energy (around 25%) via biogas-fed SOFC cogeneration modules can reduce the environmental burden associated to WWTP operations in five out of the seven impact categories that have been analyzed in this work. A further reduction of impacts, particularly concerning global warming potential and primary energy demand, is possible by the decrease of the thermal request of the digester, thus making the system independent from natural gas. In both Scenarios 2 and 3, primary energy and CO2 emissions embodied in the manufacture and maintenance of the cogeneration system are neutralized by operational savings in less than one year.


Energies ◽  
2015 ◽  
Vol 8 (3) ◽  
pp. 2211-2229 ◽  
Author(s):  
Vincenzo Liso ◽  
Yingru Zhao ◽  
Wenyuan Yang ◽  
Mads Nielsen

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