静态条件下表面活性剂SG-10对HCFC-141b水合物生成和蓄冷的促进  

Effect of surfactant SG-10 on HCFC-141b hydrate formation and cold storage under static conditions

作　　者：罗洁 孙志高[1] 李娟[1] 李翠敏[1] 黄海峰[1] LUO Jie;SUN Zhigao;LI Juan;LI Cuimin;HUANG Haifeng(School of Environment Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009

出　　处：《储能科学与技术》2024年第8期2615-2622,共8页Energy Storage Science and Technology

基　　金：江苏省高校自然科学研究重大项目(16KJA480001);江苏省自然科学基金项目(BK20170382);苏州市科技计划项目(SS202149)。

摘　　要：制冷剂水合物蓄冷是降低电网峰谷差、提高空调经济性的一种新型蓄冷技术。水合物蓄冷相变潜热大,相变温度适宜,有效克服了传统蓄冷介质的缺点。但制冷剂水合物的形成存在诱导时间长和随机性大等问题。为了促进HCFC-141b制冷剂水合物的生成,改善水合物蓄冷能力,选择聚氧乙烯型非离子表面活性剂硬脂酸聚氧乙烯酯(SG-10)作为添加剂,研究其对HCFC-141b水合物生成和蓄冷量的影响。SG-10可有效促进水合物生成,添加量是影响其促进效果的重要因素。实验研究4种不同质量浓度的SG-10对水合物生成的影响,当质量浓度为2%时水合物形成稳定性好,生长密实,是该体系最佳添加量,此时水合物形成诱导时间最短(209 min),蓄冷量最大(约为212.8 kJ/kg),水合物生长速率最快[4.09 kJ/(kg·min)]。当表面活性剂SG-10浓度达到一定值时,其会自发缔合生成胶束,为水合物提供成核位点,有助于水合物生成。SG-10在溶液中形成的胶束是促进水合物形成的主要原因。A refrigerant hydrate cold storage is a new type of cold storage technology that reduces the peak valley difference in the power grid and improves the economic efficiency of air conditioning.A hydrate cold storage has a large latent heat of phase change and an appropriate phase change temperature,which can effectively overcome the shortcomings of traditional cold storage media.However,refrigerant hydrates have certain disadvantages such as long induction time and randomness.To promote the formation of the HCFC-141b refrigerant hydrate and improve the hydrate cold storage capacity,acid ether,nonionic surfactant polyoxyethylene stearate(SG-10),is selected as an additive to investigate its effect on HCFC-141b hydrate formation and the cold storage capacity.SG-10 can effectively promote hydrate formation,and the amount added determines its promotion effect.Experimental studies were conducted on the effects of four different mass concentrations of SG-10 on hydrate formation.Within this concentration range,SG-10 can further promote the dispersion of HCFC-141b in water,increase the contact area between the reactants,and accelerate hydrate formation.When the concentration is 2%,the stability of hydrate formation is good and the amount of hydrate formation increases and grows densely,making it the optimal addition amount for this system.Furthermore,the induction time for hydrate formation is the shortest(209 min),the cold storage capacity is the largest(approximately 212.7 kJ/kg),and the hydrate growth rate is the fastest[4.09 kJ/(kg·min)].When the mass fraction of surfactant SG-10 increases to a certain value,it spontaneously associates to form micelles,which provide nucleation sites for hydrate formation.Introducing SG-10 in a solution to form micelle is an effective way of promoting hydrate formation.

关 键 词：水合物 诱导时间 蓄冷量 HCFC-141B 生长速率 

分 类 号：TB34[一般工业技术—材料科学与工程]