Web生态设计 是一种着重考虑，并旨在降低产品在其整个生命周期中对环境影响的设计方法。. 又称 可持续设计 ， 绿色设计 ， 为环境设计 。. 在 生命周期评估 中, 产品的生命周期通常被分为原材料萃取，生产制造，运输，销售，使用和处理。. 传媒设计. WebOne Ton of refrigeration: It can be defined as the amount of refrigeration effect produced by the uniform melting of one tone of ice (1000 kg) from and at 0°C in 24 hrs. 1 Tonne of refrigeration (TR)= (335x1000)/ 24. where latent heat of ice= 335 KJ/Kg= 13958.333 KJ/hr= 13958.333/24 KJ/min.
See a list of All Halogenated Refrigerants? - Answers
WebNatural refrigerants like R290 and CO2 are being used for a wide range of applications. But for installers looking for a cost-effective option that maintains a conventional system design, A2L refrigerants are an excellent choice—offering a GWP saving of 90% and more. The first air conditioners and refrigerators employed toxic or flammable gases, such as ammonia, sulfur dioxide, methyl chloride, or propane, that could result in fatal accidents when they leaked. In 1928 Thomas Midgley Jr. created the first non-flammable, non-toxic chlorofluorocarbon gas, Freon (R-12). The name is a trademark name owned by how to stop garden flooding
refrigerant receiver capacity calculation
WebIn general, all refrigerant types are characterised by two numbers: Ozone Depletion Potential (ODP) and Global Warming Potential (GWP). ODP values range from 0 to 1: … WebSulfur hexafluoride SF6 23,900 22,800 23,500 Nitrogen trifluoride NF3 17,200 16,100 PFC-14 CF4 6,500 7,390 6,630 PFC-116 C2F6 9,200 12,200 11,100 PFC-218 C3F8 7,000 8,830 8,900 PFC-318 c-C4F8 8,700 10,300 9,540 PFC-31-10 C4F10 7,000 8,860 9,200 PFC-41-12 C5F12 7,500 9,160 8,550 PFC-51-14 C6F14 7,400 9,300 7,910 PCF-91-18 C10F18 … Webume, and class B signifies refrigerants with evidence of toxicity at concentrations below 400 ppm by volume. By flammability refrigerants are divided in three class-es. Class 1 indicates refrigerants that do not show flame propagation when tested in air (at 101 kPa and 21°C). Class 2 signifies refrigerants having a lower flammabil- reactjs passing props to class component