碩士 / 國立成功大學 / 機械工程學系 / 87 / Application of the Inverse Method to Estimate the Heat Transfer Coefficient on the Plate Finned-Tube Evaporator
under Frosting Conditions
Zun-Bin Lin* Han-Taw Chen**
Department of Mechanical Engineering
National Cheng Kung University
Tainan, Taiwan, R.O.C
ABSTRACT
This thesis presents the relationship between the heat transfer rate and the frost on the Plate Finned-Tube Evaporator. This thesis is studied in two ways. One is using numerical method to estimate the relationship between the thickness of frost and the heat transfer coefficient , another is to estimate the heat transfer coefficients with experimental data by experiment.
According to the numerical method, the hybrid scheme of the Laplace transfer method and central different method in conjunction with the leate-sqrares scheme is used to solve the two-dimensional inverse heat conduction problems for evaluating heat transfer coefficient. To evidence the accuracy of the present scheme, the comparison of the present estimations and exact results is made. In the estimation of unknown heat transfer coefficient, several cases are illustrated to show the applicability and efficiency of the present numerical inverse method.
We set up a plate finned-tube evaporator in conjunction with the other experimental equipment for measuring the frost thickness and tube temperature. The heat transfer coefficient and heat flux on the tune under frosting condition can be determined using the present numerical method and these temperature measurements. In addition, the effect of relative humidity of the air and refrigerant temperature on the frost growth, heat transfer coefficient and overall heat transfer rate is investigated.
*：Author
**：Advisor
| Identifer | oai:union.ndltd.org:TW/087NCKU0489019 |
| Date | January 1999 |
| Creators | Zun-Bin Lin, 林子斌 |
| Contributors | Han-Taw Chen, 陳寒濤 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 70 |
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