Residential fuel cells now being developed combine hydrogen from natural gas or propane with oxygen from the air to produce electricity. Homeowners might be able to meet all of their energy needs with a residential fuel cell and, in some cases, even sell excess energy to a utility. Currently, PTC 50, an ASME standard, is used to measure fuel cell system performance, but it does not take into account either seasonal changes in heating and cooling requirements, or a residence's quickly changing demands for electricity.
To bridge the gap between the PTC 50 standard and the information that consumers will need to make economic decisions on installing a fuel cell, NIST researchers have published proposed test and rating methods* that will help consumers assess the economic feasibility of four different types of residential fuel cells under different climate conditions in six different geographic locations. The rating will provide the annual electrical energy produced, fuel consumed, thermal energy for domestic water heating and space heating delivered, and water used by the residential fuel cell system.
The four fuel cell types studied include systems that operate independent of the power grid with all generated power used by the residence itself; systems connected to the grid, in which electrical power output remains constant and excess electricity is sold to the utility; systems for thermal space and domestic water heating similarly connected to the grid to supplement the fuel cell power when needed; and similar but smaller systems used primarily for water heating.
The NIST test methodology and performance rating procedure uses building energy simulation results for three days, one each for winter, spring/fall, and summer for a prototypical house located in a representative city within six Department of Energy (DOE) designated climate zones, including Jacksonville, Fla.; Charleston, S.C.; Memphis, Tenn.; Pittsburgh, Pa.; Minneapolis, Minn.; and Astoria, Ore.
The NIST researchers expect to present their test methodology and performance rating procedures to standards organizations this summer. Several manufacturers have provided input on the rating methodology.
John Blair | EurekAlert!
Monocrystalline silicon thin film for cost-cutting solar cells with 10-times faster growth rate fabricated
16.03.2018 | Tokyo Institute of Technology
Research gets closer to producing revolutionary battery to power renewable energy industry
15.03.2018 | University of Kansas
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.
Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...
16.03.2018 | Event News
13.03.2018 | Event News
08.03.2018 | Event News
16.03.2018 | Earth Sciences
16.03.2018 | Physics and Astronomy
16.03.2018 | Life Sciences