highest efficiency
21Commutator (electric) — This article is about the electrical component. For mathematical concept, see Commutator . A tiny 5 segment commutator less than 2 mm in diameter, on a direct current motor in a toy radio control ZipZaps car. A commutator is a rotary electri …
22List of photovoltaics companies — This is a list of notable photovoltaics companies. (The list does not include silicon manufacturing companies.)Grid connected solar photovoltaics (PV) is the fastest growing energy technology in the world, with 50% annual increases in cumulative… …
23Solar thermal collector — A solar thermal collector is a solar collector specifically intended to collect heat: that is, to absorb sunlight to provide heat. Although the term may be applied to simple solar hot water panels, it is usually used to denote more complex… …
24Solar energy — is the light and radiant heat from the Sun that powers Earth s climate and weather and sustains life. Since ancient times it has been harnessed for human use through a range of technologies. Solar radiation along with secondary solar resources… …
25Sunswift — is a full scale, multi disciplinary, student led engineering project. Students from a range of faculties from engineering to business form the UNSW Solar Racing Team (SRT). They volunteer their time and skills to fund, design, build, equip and… …
26Microwave power transmission — (MPT) is the use of microwaves to transmit power through outer space or the atmosphere without the need for wires. It is a sub type of the more general wireless energy transfer methods, and is the most interesting because microwave devices offer… …
27David Carroll (physicist) — For other people named David Carroll, see David Carroll (disambiguation). Prof. Carroll in 2003 David Carroll (born 1963) is a U.S. physicist and nanotechnologist, Fellow of the Society of Nanoscience and Nanotechnology, and director of the… …
28Brushed DC electric motor — A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Contents 1 Simple two pole DC motor 2 The commutating plane 2.1 Compensation for stator field distortion …
29Gas-filled tube — See also: Gas discharge lamp A gas filled tube, also known as a discharge tube, is an arrangement of electrodes in a gas within an insulating, temperature resistant envelope. Although the envelope is typically glass, power tubes often use… …
30Specific speed — Pump Specific Speed is an index that, in mechanical terms, represents the impeller speed of a pump necessary to generate 1 gallon per minute at 1 foot of head.Ns = (n*sqrt(Q)) / (gH^(3/4))Ns = specific speed (unitless)n = pump rotational speed in …
