Experimental Study On HCFC-141b/HCF-134a Gas Hydrate As A Cool Storage Medium

With the contradiction that lack of electric power during peak while overmuch during off-peak more and more prominent, it needs a technology that can transfer electricity from off-peak to peak time. Air-condition cool storage uses off-peak electricity to store coolness during nighttime and discharges it during on-peak on daytime. It has become one of the most important approaches to solve the electric serve because that it can shift peaking load efficiently and equilibrate the electric load.The exploitation of cool storage material is the first problem of aircondition cool storage technology. Gas hydrate, as a new generation air conditioning material, conquers the drawbacks of ice, water and eutectic salt. It is considered a kind of ideal cool storage material with the advantages of phase changing temperature between 5～12℃, which makes it compatible with the conventional air conditioner; comparative latent, heat as that of the ice; high boiling coil surface temperature during charged and discharged process; saving 20%～30% energy compared to ice cool storage system.On the basic of established an installation of a visually experimental cool storage tank, according to advantage of mixture gas hydrate, the paper does some experiment of mixture refrigerant of high pressure refrigerant HFC-134a, low pressure refrigerant HCFC-141b and water, studies the charged and discharged process with different quality, then investigates the properties under different conditions such as different temperature, disturbance and additives, thought the experimental phenomena finds that the law of charged and discharged process and its capacity. The results show that: (1) more quality of HFC-134a when the quality of HCFC-141b and water are the same can enhance the cool storage capacity, reduce cool storage time; (2)more water can low down the temperature of phase change and cool storage capacity when the quality of HCFC-141b and HFC-134a are the same; (3) disturbance, a vital factor to the generation of gas hydrate, the more strength the higher cool storage capacity and rate; (4)some suitable glycol as additive can enhance the cool capacity and rate of cool storage material; (5)there is no fluence to the cool storage material's properties or capacity when repeat experiments; (6)to the cool storage material HCFC-141b 17Kg,HFC-134a 1.1Kg and water 80Kg, its phase change temperature is between 6.5℃～8.6℃, pressure in the cool storage tank is between -46KPa～65KPa and its capacity is about 348KJ/Kg.