Design of Heat Cycle System Using Natural Fluid Mixtures Containing Supercritical Carbon dioxide

含有超临界二氧化碳的天然流体混合物的热循环系统设计

• 批准号: 14580537
• 负责人: OCHI Kenji
• 金额: $ 1.47万
• 依托单位: Nihon University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14580537/
• 关键词: Sunercritical carbon dioxide; Heat of mixing; Heat pump

This research aims at developing an environmentally benign heat pump, which utilize the large heat effect at mixing carbon dioxide with methanol in the region of critical point of carbon dioxide. In this year, the heat cycle system designed until now was examined to accomplish the system through performing the following subjects.1. The flow of the heat cycle system was basically same as it designed at last year. The system was followed by some partial modifications.(1)In order to increase the generation of heat at mixing, the design of mixing cell was examined to select an effective one.(2)For the gas-liquid separator for distributing a mixture into carbon dioxide (gas phase) and methanol (liquid phase)) the volume of separator was enlarged to perform the stable pressure control around the separator, and also to maintain a constant amount of liquid hold-up.(3)A booster-compressor unit was introduced to facilitate the liquefaction of the carbon dioxide recycled and ensure the stable ope … More ration. Thus the modified system was used to attempt the recovery of heat in the mixing cell by heat-exchanger with water. From the results of this test, it was confirmed that about 50 %of the theoretical heat of mixing were able to recover. This heat effect will depend on the results that the ratio of heat of mixing consumed in the sensible-heat of mixtures to the theoretical values will be large in this small scale apparatus. However, the fruit of our research will be useful for design of a practical heat supply system.2. This research for the heat cycle system was followed by searching such new fluids that the larger heat effect can be expected at mixing with carbon dioxide. The measurement of heats of mixing by an accurate calorimeter has revealed the facts that the fluoro ethers and dialkyl carbonates provide twice heat value as much as alcohol's one. Then our heat cycle system was promoted by those results.3. Moreover, our research project has attempted to predict the pressure-temperature dependence of heat of mixing in the region of critical point. A prediction method of heat of mixing at high pressure has been examined. After this, our research will be followed by the search of new fluids for the endothermic system and also the prediction of heats of mixing. Less

本研究旨在开发一种环保型热泵，利用二氧化碳与甲醇在临界点区域混合时产生的巨大热效应。在这一年中，迄今为止设计的热循环系统进行了检查，以完成系统通过执行以下主题。1.热循环系统的流程与去年设计的流程基本相同。该系统随后进行了一些局部修改。(1)In为了增加混合时的热产生，对混合室的设计进行了检查以选择有效的混合室。（2）对于用于将混合物分配成二氧化碳（气相）和甲醇（液相）的气-液分离器，扩大分离器的体积以进行分离器周围的稳定压力控制，并且还保持恒定的液体滞留量。(3)A为了使回收的二氧化碳液化，保证稳定运行，引入了增压压缩机组 ...更多信息 定量配给。因此，修改后的系统被用来尝试通过与水的热交换器来回收混合池中的热量。根据该试验的结果，证实能够回收约50%的理论混合热。这种热效应将取决于在这种小型装置中混合物显热所消耗的混合热与理论值的比值很大的结果。本文的研究成果对实际供热系统的设计具有一定的参考价值.在热循环系统的研究之后，寻找这样的新流体，即与二氧化碳混合时可以预期更大的热效应。用精密量热计测定了混合热，发现氟醚和碳酸二烷基酯的热值是醇的两倍。在此基础上，对热循环系统进行了改进.此外，我们的研究项目已试图预测的压力-温度依赖的混合热在临界点区域。本文研究了一种高压混合热的预测方法。在此之后，我们的研究将遵循的吸热系统的新流体的搜索和混合热的预测。少

项目成果

Akinori Nagashima, Shigetaka Yoshii, Hidemoto Saeki, Hiroyuki Matsuda, Kiyofumi Kurihara, Kenji Ochi: "Measurement and Correlation of Excess Enthalpies of Binary System Containing High Pressure CO_2"Proceeding of Annual Academic Meeting, College of Scienc

Akinori Nagashima、Shigetaka Yoshii、Hidemoto Saeki、Hiroyuki Matsuda、Kiyofumi Kurihara、Kenji Ochi：“含高压 CO_2 的二元系统过量焓的测量和相关性”科学学院年会论文集

Kenji Ochi, Wenbin Dai, Yutaka Wada, Hiroyuki Hayashi, Kiyofumi Kurihara, Kazuo Kojima: "Measurement and correlation of excess molar enthalpies for the systems containing supercritical carbon dioxide and alcohols"Fluid Phase Equilibria. 194-197. 919-928 (

Kenji Ochi、Wenbin Dai、Yutaka Wada、Hiroyuki Hayashi、Kiyofumi Kurihara、Kazuo Kojima：“含有超临界二氧化碳和醇的系统的过量摩尔焓的测量和相关性”流体相平衡。

越智健二: "超臨界領域における混合熱とその利用"Journal of the Society of Inorganic Materials, Japan. 8.3. 166-173 (2001)

Kenji Ochi：“超临界区的混合热及其利用”，日本无机材料学会杂志 8.3（2001 年）。

竹本礼一, 大塚剛久, 松由弘幸, 栗原清文, 越智健二: "超臨界領域における混合熱を利用した給熱システム"平成15年度日本大学理工学部学術講演会論文集. 1358-1359 (2003)

Reiichi Takemoto、Takehisa Otsuka、Hiroyuki Matsuyoshi、Kiyofumi Kurihara、Kenji Ochi：“超临界区域使用混合热的供热系统”2003年日本大学科学技术学院学术会议记录1358-1359（2003）。

永島明憲, 吉井重隆, 佐伯知英, 松田弘幸, 粟原清文, 越智健二: "高圧CO_2を含む2成分系過剰エンタルピーの測定と相関"平成15年度日本大学理工学部学術講演会論文集. 1356-1357 (2003)

Akinori Nagashima、Shigetaka Yoshii、Tomohide Saeki、Hiroyuki Matsuda、Kiyofumi Awahara、Kenji Ochi：“含有高压CO_2的二组分系统中过量焓的测量和相关性”2003年日本大学科学技术学院学术会议论文集。 1356-1357 (2003)