collector efficiency
71Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …
72Transistor — For other uses, see Transistor (disambiguation). Assorted discrete transistors. Packages in order from top to bottom: TO 3, TO 126, TO 92, SOT 23 A transistor is a semiconductor device used to amplify and switch electronic signals and power. It… …
73Cyclonic separation — A simple cyclone separator Cyclonic separation is a method of removing particulates from an air, gas or liquid stream, without the use of filters, through vortex separation. Rotational effects and gravity are used to separate mixtures of solids… …
74Energy tower (downdraft) — An energy tower is a method for producing electrical power for consumer consumption, the brainchild of Dr. Phillip Carlson,ref|Carlson which has been expanded upon by Professor Dan Zaslavsky from the Technion.ref|ET brochure An energy tower… …
75Solar air conditioning — refers to any air conditioning (cooling) system that uses solar power. This can be done through passive solar, photovoltaic conversion (sun to electricity), or solar thermal energy conversion. The U.S. Energy Independence and Security Act of… …
76Hybrid electric vehicle — The Toyota Prius is the world s top selling hybrid car, with cumulative global sales of 2.36 million units by August 2011.[1] A hybrid electric vehicle (HEV) is a type of hybrid vehicle and electric vehicle which combines a conventional internal …
77Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
78book collecting — Introduction acquisition of books, not only as texts but also as objects desirable for such qualities as their age, scarcity, historical significance, value, beauty, and evidence of association with some important person. Exercising… …
79Thin film solar cell — Cross section of thin film polycrystalline solar cell. A thin film solar cell (TFSC), also called a thin film photovoltaic cell (TFPV), is a solar cell that is made by depositing one or more thin layers (thin film) of photovoltaic material on a… …
80Micro combined heat and power — or micro CHP is an extension of the now well established idea of cogeneration to the single/multi family home or small office building. Contents 1 Overview 2 Micro CHP systems 3 Engine types and technologies …
