高温ヒートポンプにおけるシェルアンドチューブ熱交換器のサロゲートモデル支援予備設計・実験検証・最適化

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:サロゲートモデルを伝熱相関式の代替として予備設計に組み込む手法は、相関式が存在しない構成・作動流体への拡張に有用。

🏢実務担当者:高温ヒートポンプ導入検討時の熱交換器サイズ・出口温度・圧力損失のトレードオフ設計に活用できる。

🏛政策担当者:産業熱電化を促す政策設計において、高温ヒートポンプの技術的実現性と設計最適化の進展を示す根拠となる。

High temperature heat pump systems are increasingly integrated into the process industry with the objective of decarbonizing the heat supply. To support sustainability and decarbonization goals, the DLR Institute of Low-Carbon Industrial Processes in Cottbus, Germany, has developed a high temperature heat pump pilot plant that operates on the principle of the reverse Brayton cycle (CoBra). In a heat pump system, the role of heat exchangers is critical as they facilitate the transfer of thermal energy from the source and supply heat to the industrial process. The motivation of this study is to establish a robust methodology of using surrogate models instead of analytical correlations, such that it serves as a validation to extend its application to other heat exchanger configurations and working fluids where no established correlations exist, paving the way for the widespread adoption of high temperature heat pump systems in the process industry. The current study focuses on modelling a shell and tube heat exchanger in the CoBra heat pump with sink temperature exceeding 200 °C. The heat exchanger predesign methodology adopted in this work follows a stepwise approach. First, the conventional heat transfer correlations for the Nusselt number were applied to CoBra heat exchanger data using the P-NTU approach. Second, a comprehensive CFD database was generated using 3D RANS simulations to capture detailed heat transfer behavior for different flow and geometry combinations. Third, surrogate models based on Gaussian process regression and neural networks were trained on this CFD database to replace the conventional heat transfer correlations. Finally, these surrogate models were integrated into an updated predesign tool. The numerical results from the existing conventional heat transfer correlation and surrogate models are validated against the experimental observations from the CoBra heat pump, demonstrating a satisfactory agreement. Building on this foundation, an optimization study was conducted to minimize the size of the CoBra heat exchangers while achieving higher exit temperatures and maintaining acceptable pressure drop.

• semanticscholar https://asmedigitalcollection.asme.org/GT/proceedings-pdf/GT2026/89756/V005T13A003/7649054/v005t13a003-gt2026-176351.pdffirst seen 2026-10-23 06:04:14 · last seen 2026-11-02 05:29:48