Potential of SOFC CHP systems for energy-efficient commercial buildings

Abstract An energy-efficient and low-emissions solid oxide fuel cell (SOFC) combined heat and power (CHP) system is a promising electric and thermal energy generation technology for implementation in future commercial buildings. Recently developed performance models for kW- and MW-sized SOFC CHP systems have been integrated into a building energy simulation model of a medium-sized (7000 m 2 ) office building to evaluate the potential of the system to lower annual utility costs and to reduce CO 2 emissions. An optimized 175 kW SOFC CHP system successfully lowered annual utility costs by up to 14.5% over a baseline HVAC system in locations with space heating-dominant loads. Potential CO 2 emissions were reduced by up to 62% over the baseline case for the optimized SOFC CHP systems. If the capital and installation costs of SOFC CHP systems are reduced in the near future, through the realization of cheaper, high-performance intermediate temperature SOFCs, the SOFC CHP system may be a promising energy-efficient and low-emitting alternative power and thermal energy cogeneration technology.

[1]  X. Ye,et al.  Performance of Ni/ScSZ cermet anode modified by coating with Gd0.2Ce0.8O2 for a SOFC , 2007 .

[2]  S. Singhal.  Solid oxide fuel cells for stationary, mobile, and military applications , 2002 .

[3]  Andrea Luigi Facci,et al.  SOFC Management in Distributed Energy Systems , 2011 .

[4]  R. O’Hayre,et al.  Fuel Cell Fundamentals , 2005 .

[5]  Robert J. Braun,et al.  Evaluation of system configurations for solid oxide fuel cell-based micro-combined heat and power generators in residential applications , 2006 .

[6]  Adam Hawkes,et al.  Solid oxide fuel cell micro combined heat and power system operating strategy: Options for provision of residential space and water heating , 2007 .

[7]  A. Boudghene Stambouli,et al.  Solid oxide fuel cells (SOFCs): a review of an environmentally clean and efficient source of energy , 2002 .

[8]  Douglas J. Nelson,et al.  Fuel cell systems: efficient, flexible energy conversion for the 21st century , 2001, Proc. IEEE.

[9]  Ernst Riensche,et al.  Optimization of a 200 kW SOFC cogeneration power plant. Part I: Variation of process parameters , 1998 .

[10]  V. Ismet Ugursal,et al.  The financial viability of an SOFC cogeneration system in single-family dwellings , 2006 .

[11]  Adam Hawkes,et al.  Solid oxide fuel cell systems for residential micro-combined heat and power in the UK: Key economic drivers , 2005 .

[12]  Yixin Lu,et al.  A solid oxide fuel cell system for buildings , 2007 .

[13]  Timo Kivisaari,et al.  Conceptual study of a 250 kW planar SOFC system for CHP application , 2004 .

[14]  Marc Medrano,et al.  Integration of distributed generation systems into generic types of commercial buildings in California , 2008 .