Cgcclive's Channel. 20. Fluid Dynamics and Statics and Bernoulli's Equation. EDU. Sky. Toplinske pumpe. Razvoj rashladne tehnike i toplinskih pumpi[uredi VE | uredi] Potreba za hlađenjem pojavila se već u 18.stoljeću kada su ljudi, da bi hranu održali hladnom, rezali iz jezera led i spremali ga u zimi u izolirane prostorije kako bi ga čuvali do ljeta, a kroz ljeto ga koristili. Prvi koji je uspio proizvesti aparat, preteču današnjem kompresoru, bio je američki inženjer Jacob Perkins 1834. godine. Prvi oblik rashladnog uređaja proizveden je 1855. godine u Njemačkoj, iako je Michael Faraday otkrio princip njegova rada već 1824. godine. Takav uređaj proizvodio je umjetni led sve do 1890. godine kada se nakon blage zime pojavila veća potražnja za ledom. Teoretski princip rada toplinske pumpe[uredi VE | uredi] Toplinska pumpa je sustav koji se bazira na lijevokretnom Carnotovom kružnom procesu koji toplinu u stroju pretvara u rad, pri čemu se koristi idealni plin, najčešće neki od freona ovisno o željenim temperaturama.
βR=Q0/W Dijelovi toplinske pumpe[uredi VE | uredi] 1. 2. Other Stirling engines - Мозилин фајерфокс (Mozilla Firefox) There are other types of Stirling engines than those studied in the specific pages of this site. By taking the standard Gamma engine for reference, the principal models worthy of interest are the following: 1.
The free piston engine or Martini engine : The operating piston moves according to the pressure of the engine. When the pressure increases, it is pushed in one direction. 2. In contrast to the previous one, the piston is mechanically driven. 3. This engine combines the advantages of the previous models.The great advantage is that one can obtain an absolute sealing because there does not exist any mechanical connection with outside. 4. The principle consists in putting several alpha engines in “series”. 5. In a first approch, this engine is like a Wankel rotary engine or a pallet compressor. 6.
The ancestor of the free piston Stirling engine ? 7. Based on the cycle of Stirling, this device makes it possible to carry water. 8. This site was created and is maintained by Pierre Gras. Acrylic Fluidyne Engine - YouTube - Мозилин фајерфокс (Mozilla Firefox) The W. Ross Ashby Digital Archive - Мозилин фајерфокс (Mozilla Firefox) Fluidyne engine 1 - Мозилин фајерфокс (Mozilla Firefox) Back to homepageFluidyne engineFluidyne engine is a type of Stirling engine in which regular moving pistons have been replaced by moving water column. Since water column always fits the cylinder, machining and fitting the piston to the cylinder is unnecessary. Various sources have reported efficiencies of some types of large Fluidyne engines to reach 5%.
Smaller engines are usually much less efficient. For scientific discussion, Stirling Engines and Irrigation Pumping paper by C. D. West from 1987 is highly recommended. Basic Fluidyne setup with coil wound on top of the hot chamber. Possible use for a Fluidyne is water pumping, using solar concentrators to deliver useful heat energy to the hot chamber. Initially I used a heat gun instead of induced current for heating the hot chamber pipe.
AC induction heating turned out to be a bit more difficult than expected. I assembled a rough wooden frame from pieces leftover from previous projects. DeSoto solar-powered Fluidyne Back to homepage. Fluidyne engine - Wikipedia, the free encyclopedia - Мозилин фајерфокс (Mozilla Firefox) This is a Fluidyne variant with a solid displacer piston (3). In figure -a-, as the displacer moves from the cold compression space (2), to the hot expansion space (4) in figure -b-, the temperature of the gaseous working fluid is increased. This increases the pressure of the gaseous working fluid, and as it expands, work is done on the (red) liquid piston as it is pushed through the tube. A Concentric-cylinder Fluidyne Pumping engine A Fluidyne engine is an alpha or gamma type Stirling engine with one or more liquid pistons.
Engine operation[edit] Working gas in the engine is heated, and this causes it to expand and push on the water column. Engine as a pump[edit] In the classic configuration, the work produced via the water pistons is integrated with a water pump. Demonstration video[edit] Test of a model fluidyne engine. Detail of a water level displacement in a leftmost vertical tube.
The videos show operation of a model fluidyne engine. See also[edit] Humphrey Pump References[edit]
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