| Summary: | 碩士 === 國立臺北科技大學 === 製造科技研究所 === 101 === This thesis snake-pipe heat exchanger drinking water system in the case of heat exchange to explore the changing snake snake tube heat exchanger tube length optimize efficiency, and using the software EES (Engineering Equation Solver) simulations, and experimental verification.
I set the range of optimum design length of the snake tube 4 (m) to 10 (m), and when the snake-pipe from 4 (m) increased to 10 (m), then the hot water mass flow rate from 4.101E-02 (kg / s) down to 3.414E-02 (kg / s),cold water mass flow rate from 5.245E-02 (kg / s) down to 3.317E-02 (kg / s); snake-pipe areas from 1.065(m^2) increased to 2.661(m^2).
Snake-pipe Length 5.7m heat exchanger has the largest water heat absorption rate of 99.8%, the snake-pipe length 4 (m) to 5.7 (m), the flexible tube length absorbing efficiency of positive correlation, 5.7 (m) to 10 (m), the flexible tube length endothermic efficiency negatively correlated.
this article joins the air factor in heat exchanger mode, air convection coefficient input from 25 (W / (m^2)∙ K) to 500 (W / (m^2) ∙ K),then air convection heat loss the amount of the cold water side absorbent pass heat transfer ratio of the amount of 1/244 to 1/293.
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