為達成精準控制醫療儀器操作環境溫度，使醫療儀器維持其準確的檢測或治療效果，本文以板式熱交換器配合系統動態模型設計控制系統完成精準 控制目標。控制器輸出的訊號為板式熱交換器冷水入口三通閥開通比率，藉控制閥門的開率調變流進板式熱交換器的冷水流量改變熱交換率，達成熱水出口溫度的調控並維持進入醫療儀器的工作流體溫度。透過熱力學的第一定律，我們可以建立板式熱交換器以及醫療儀器冷卻系統的數學模型，進而描述整體雙熱交換系統的模型。在給定特定規格下，經由最佳化程序選取響應控制器參數。最後運用X-CAN完成控制器與系統的通訊介面實現，由實際測試控制系統響應結果驗證本文提出的控制系統系統化設計對精確溫度控制具有相當之參考性。

In this paper, the controller is designed based on the plate heat exchanger introduced to the system dynamic model to achieve the goal that the operating temperature of the medical instrument can keep at a precise temperature with a range of under some different conditions, such that making the medical instrument have the precision of the examination and a significant effect of the treatment. The signal of the control output is the open ratio of the three-way valve placed in the inlet of the cold water. The flow of the cold water at the inlet of the plate heat exchanger would change with the adjustment of the three-way valve to influence the efficiency of the heat transfer. The temperature of the working liquid at the input of the medical instrument can be maintained at the desired temperature through the adjustment of the three-way valve. According to the first law of thermodynamics, the mathematical model of the cooling system of the medical instrument with a plate heat exchanger contained can be established. The control parameters can be determined by the process of optimization under certain specifications. Eventually, X-CAN is introduced to implement the communication between the controller and the overall system. The feasibility of the design optimized controller brought up in this dissertation can be verified through the response of the control system in the experiment.

[1] https://www.midsouthchemical.com/heat-transfer-fluids-glycols/
[2] https://www.barriquand.com/en/heat-exchangers-applications
[3] http://www.authorstream.com/Presentation/ATS_inc-2075036-ats-liquid-cooling-capabilities-2014/
[4] https://www.aelheating.com/blog/plate-heat-exchangers-work/
[5] https://foodprocessinghistory.blogspot.com/2016/11/plate-heat-exchanger.html
[6] R. K. Shah and W. W. Focke, “Plate heat exchanger and their design theory, “ Heat transfer equipment design, edited by R. K. Shah, E.C. Subbarao and R. A. Mashelkar, pp.227-254, Taylor & Francis, 1st Edition, 1988.
[7] Focke, W. W. and Knibbe P. G., 1986, “Flow visualization in parallel- plate ducts with corrugated walls,” Journal of Fluid Mechanics, Vol. 165, pp. 73-77.
[8] Tribbe, C., and Muller- Steinhagen, H. M., 2001, “Gas/liquid flow in plate-and-frame heat exchangers—Part II: two-phase multiplier and flow pattern analysis,” Heat Transfer Engineering, Vol. 22, pp. 12- 21.
[9] Gschwind, P., Gaiser, G., Zimmerer, C. and Kottke, V., 2001, ―Transport phenomena in micro heat exchangers with corrugated walls, Microscale Thermophysical Engineering, Vol. 5, pp. 285- 292.
[10] Lozano, A., Barreras, F., Fueyo, N., and Santodomingo, S., 2008, ―The flow in an oil/water plate heat exchanger for the automotive industry, Applied Thermal Engineering, Vol. 28, pp. 1109- 1117.
[11] Kedzierski, M. A., 1997, ―Effect of inclination on the performance of a compact brazed plate condenser and evaporator, Heat Transfer Engineering, Vol. 18, No. 3, pp. 25-38.
[12] Freund, S., Kabelac, S., 2010, “Investigation of local heat transfer coefficients in plate heat exchangers with temperature oscillation IR thermography and CFD, “ International Journal of Heat and Mass Transfer, Vol. 53, pp. 3764-6781
[13] http://disp.ee.ntu.edu.tw/tutorial/WaveletTutorial.pdf
[14] https://info.erdosmiller.com/blog/pid-anti-windup-techniques
[15] https://www.theengineeringprojects.com/2017/08/introduction-to-myrio.html
[16] http://www.ni.com/pdf/manuals/376047c.pdf
[17] https://forgeforward.in/hwjunction/labs/ni/
[18] https://www.picotech.com/library/oscilloscopes/can-bus-serial-protocol-decoding
[19] https://www.csselectronics.com/screen/page/simple-intro-to-can-bus/language/en
[20] https://en.wikipedia.org/wiki/Riemann_sum