cost efficiency
41Thermal efficiency — In thermodynamics, the thermal efficiency (eta {th} ,) is a dimensionless performance measure of a thermal device such as an internal combustion engine, a boiler, or a furnace, for example. The input, Q {in} ,, to the device is heat, or the heat… …
42Energy efficiency in British housing — Domestic housing in the United Kingdom presents one of the major opportunities for achieving the 20% overall cut in UK carbon dioxide emissions targeted by the Government for 2010.Carbon emissionsAlthough carbon emissions from housing have… …
43Office of Energy Efficiency and Renewable Energy — The Office of Energy Efficiency and Renewable Energy (EERE) is an office within the United States Department of Energy that invests in high risk, high value research and development in the fields of energy efficiency and renewable energy… …
44Water efficiency — can be defined as *1) the accomplishment of a function, task, process, or result with the minimal amount of water feasible; *2) an indicator of the relationship between the amount of water required for a particular purpose and the amount of water …
45Direct labour cost variance — is the difference between the standard cost for actual production and the actual cost in production.[1] There are two kinds of labour variances. Labour Rate Variance is the difference between the standard cost and the actual cost paid for the… …
46International Partnership for Energy Efficiency Cooperation — The energy ministers from the Group of Eight (G8) industrialized countries and from China, India, and South Korea have agreed to establish the International Partnership for Energy Efficiency Cooperation (IPEEC). The IPEEC will enhance global co… …
47Detective quantum efficiency — The detective quantum efficiency (often abbreviated as DQE) is a measure of the combined effects of the signal (related to image contrast) and noise performance of an imaging system, generally expressed as a function of spatial frequency. This… …
48High efficiency solar cells — are solar cells specifically designed to generate electricity in a cost effective and efficient manner. In 1994, the University of New South Wales reported the highest silicon solar cell efficiency of 24.7% with their PERL cell technology. In… …
49Low-cost solar cell — The low cost solar cell is an effort to make solar power price competive with traditional (fossil fuels and nuclear power) energy sources.The polysilicon shortage [http://www.greentechmedia.com/articles/charting a path to low cost solar 1128.html …
50Fuel efficiency — is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work. Overall fuel efficiency may vary per device, which in turn may vary per… …
