A study on the effect of the operating conditions on performance of CO2 hydrate cooling system for district cooling applications.

As one of the solutions to solve the global warming problem, Carbon Capture, Utilization and Storage (CCUS) technologies became a major research topic. Carbon dioxide (CO2) hydrate utilization technique is considered as a practical application of the captured carbon dioxide. In this study, the performance of the lab-scale CO2 hydrate cooling system is evaluated by the experiments with tetrahydrofuran(THF). The change of hydrate formation temperature by THF concentration variation and CO2hydrate formation
phenomenon during transition region are observed.It is found that the higher THF concentration the higher operating temperature is obtained. It is also found that CO2hydrate frost layer is generated after the hydrate formation, which causes the reduction of the heat transfer rate.

作为解决全球变暖问题的方案之一，碳捕集利用与封存（Carbon Capture, Utilization and Storage, CCUS）技术已成为重要的研究热点。二氧化碳（CO₂）水合物利用技术被视为捕集所得二氧化碳的实用化应用途径。本研究采用四氢呋喃（tetrahydrofuran, THF）开展实验，对实验室规模的CO₂水合物制冷系统的性能进行评估。实验观测了四氢呋喃浓度变化对水合物生成温度的影响，以及过渡区域内的CO₂水合物生成现象。研究发现，四氢呋喃浓度越高，系统运行温度越高；同时还观测到，水合物生成后会形成CO₂水合物霜层，该霜层会导致传热速率降低。