June 23, 2013
June 23, 2013
June 26, 2013
Energy Conversion and Conservation
23.948.1 - 23.948.11
Optimization and testing of a first generation cavitation heat pumpWith growing environmental concern and the cost of energy rising, many cost effective andenergy efficient technologies are developed. Such an example is heating water usingconventional gas/electric water heaters or renewable energy such as solar power or geothermal.Currently, most widely used way to heat water is by burning fossil fuels. This is often a largefactor in determining the pollution caused by heating water for commercial or residential use.Despite the availability of renewable energy resources, the innovations that rely upon thesealternative sources are not viable due to uncontrollable nature and economic factors. In this paper,cavitation heat pump serves as a promising beacon to engineers as it may be the answer as tohow to heat water for commercial and residential purposes efficiently is introduced.This cavitation pump directly converts electrical energy into thermal energy through cavitationinduced by the rotation of the working fluid. The cavitation heat pump decreases the pressure ofthe working fluid, in this case which is water, to a point below its saturation pressure, whichconsequently induces cavitation. Energy is released in the form of heat when the bubblescollapse, which in turn causes the water temperature to rise.Over the course of the project, thirty gallons of water was heated from 30C to 70C. Thetemperature, time and the amperage were recorded at five degree Celsius intervals and wereanalyzed to determine correlations between them after each trial. The cost of heating using acavitation heat pump was compared to that of conventional heating methods such as natural gasand electricity. The cavitation heat pump was modeled using CAD software while the thermaland fluid analyses were performed using Finite Element Analysis software. The heating system,comprised of cavitation heat pump, the water tank, motor, pump and piping, was altered after afew trials were conducted with a given setup to determine the optimal design, performance of thesystem and to minimize the cost.In addition to the immense potential of the cavitation heater to serve as a means of heating water,cavitation heating effectively heats water uniformly without temperature gradient betweenregions. Furthermore, the lack of a heat transfer surface prevents scale build up and ensures theheating of clean water.A major objective of this project is to enhance the educational experiences of engineeringstudents while working on a team project resembling a realistic work environment similar to thatof and industrial setting. The outcome of such learning experiences from this effort will be thedesign, implementation, theoretical analysis, model development and experimental application inthe near future of an interdisciplinary project oriented course for engineering students. Thiscourse will involve concepts from fluid mechanics, heat transfer, electronics, finite elementanalysis, instrumentation, and data acquisition/analysis.
Tahmid, S. M., & Gill, B. S., & Park, K. M., & Ryu, Y., & Lee, S. (2013, June), Optimization and testing of a first generation cavitation heat pump Paper presented at 2013 ASEE Annual Conference & Exposition, Atlanta, Georgia. https://peer.asee.org/22333
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