peak efficiency
21Plug-in hybrid — The Chevrolet Volt is the first mass production plug in hybrid available in the United States. A plug in hybrid electric vehicle (PHEV), plug in hybrid vehicle (PHV), or plug in hybrid is a hybrid vehicle which utilizes rechargeable batteries, or …
22Grid energy storage — is used to manage the flow of electrical energy. For large scale load levelling on an interconnected electrical system, electric energy producers send low value off peak excess electricity over the electricity transmission grid to temporary… …
23Diesel engine — Diesel engines in a museum Diesel generator on an oil tanker …
24Fossil-fuel power station — A working coal plant in Rochester, Minnesota The St. Clair Power Plant, a large coal fired ge …
25Maximum power point tracking — Current voltage characteristics of a solar cell at a particular light level, and in darkness. The area of the yellow rectangle gives the output power. Pmax denotes the maximum power point Maximum power point tracking (MPPT) is a technique that… …
261993 "Maize & Blue" University of Michigan Solar Car — The 1993 Maize Blue solar car was built by the University of Michigan Solar Car Team during the period from 1990 to 1993. The car was raced in two races. The car won a national championship in Sunrayce 93, the predecessor race to the North… …
27ancient Rome — ▪ ancient state, Europe, Africa, and Asia Introduction the state centred on the city of Rome. This article discusses the period from the founding of the city and the regal period, which began in 753 BC, through the events leading to the… …
28Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …
29Water turbine — A water turbine is a rotary engine that takes energy from moving water.Water turbines were developed in the nineteenth century and were widely used for industrial power prior to electrical grids. Now they are mostly used for electric power… …
30Centrifugal compressor — Centrifugal compressors, sometimes termed radial compressors, are a sub class of dynamic axisymmetric work absorbing turbomachinery.[1] Centrifugal impeller with a highly polished surface likely to improve performance …
