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LNG cold energy used in the feasibility of cold storage freezer


More than an hour cooling system power consumption 2674KWh, use of LNG cold energy of the direct evaporative cooling system is a mechanical refrigeration system power consumption to 33.2%. At work 15 hours per day, compared with conventional mechanical refrigeration system using LNG cold energy of I2 and more cost electricity for the refrigeration system 2674KWh / h × 15h / d = 40110K delete d. 5) save water every day: a day of work at 15d, when the meter, conventional mechanical refrigeration system and more water consumption per day: 20m / h ~ 15h / d = 300m / d. V. Comparison of environmental protection is the world's most environmentally an eternal topic of concern, the following conventional mechanical refrigeration system and the use of LNG cold energy of the direct evaporative cooling system of environmental protection to make a comparison of the data. To freeze the construction of 64,000 tons cold storage materials, for example, use of LNG cold energy of the direct evaporative cooling system compared with conventional mechanical refrigeration system,[link widoczny dla zalogowanych], to reduce emissions of pollutants per day (calculated according to the North of coal): CO: 40110KWh / day 878.8g / I (Wb = 35.2t / day of SO,: 40110KWh / day 10egKWh = 401.1keg days NO: 40110KWh / day of 4.7g /] KWh = 188.5k day total particulate matter: 40110KWh / day 47.8gWh = 1.92t / day Table 8 China's fossil fuel power plant emissions of air pollutants 【g/KWh1-9 a \refrigeration system makes full use of liquefied natural gas deposits in the large number of cold energy, LNG cold energy industry in the use of refrigerated significant savings in energy, improve economic efficiency, but also greatly simplifies the cold storage refrigeration systems, cold storage of the initial savings investment and operating costs and reduce pollution of the environment. LNG cold energy utilization has significant economic and social benefits, with the increasingly widespread use of LNG,[link widoczny dla zalogowanych], LNG cold energy reserves are also attracting increasing attention. in China on the development and utilization of LNG cold energy has been on the agenda. I believe the leadership at all levels of attention and strong support of the majority of the efforts of scientists, LNG cold energy utilization in China will have a rapid development . References [1】 Department of Commerce and Design Institute. cold storage refrigeration Guide 【M】. Beijing: Agriculture Press, 1991. 【2】 Xu Wenyuan, Jiang Changan. natural gas use Manual [M】. Beijing: China Petrochemical Press, 2002 . [3】 King strengthening and so on. Liquefied natural gas technology quiz 【M】. Beijing: Chemical Industry Press. 2006. ammonia toxicity grading criteria Haojing Xi defined food group in Hong Kong Kam Tong Yang Industry Company 225,004 state has a certain toxic ammonia is a refrigerant (United Nations UN number is 1005.) countries to strengthen production safety management, the relevant functional departments of local governments,[link widoczny dla zalogowanych], such as the Safety Authority, the fire department,[link widoczny dla zalogowanych], special equipment safety supervision authorities regularly arranged various security reports, require the use of units reported. Most of the report a \I looked up the relevant norms, sorting out the following form for users. Specification No. canonical name of method or basis for classification rating Remarks on human health hazards of toxic or corrosive GB12268 of dangerous goods 2.3CN No. 23003 Gas 2008 Dangerous Chemicals Directory (national level under the toxic hazard,[link widoczny dla zalogowanych], corrosive, or in danger by GB5044 / innings) risk of GB50016GB a 7778 number and the security classification of refrigerant A: non-toxic B: toxic 1: non-flammable 2: The first group B2 harmless combustible, non-flammable; second initiation point of the third group was lower than GB.9237 mechanical refrigeration system safety requirements for the second group of not less than 3.5% 3.5% GB.5044 occupational exposure to toxic damage degree classification of six classification methods, a sub-I grade Ⅳ Ⅳ (light) GB.50016 building design for fire protection limit flash point 928 ℃ ≥ 10% B GB50235 and GB.50316 industrial metallic piping design in accordance with the GB5044.II class This follows similar A2 electrical installations and fire hazard during normal operation GB.50058 release of the second frequency and duration of the design pressure of the release of the source does not release harmful levels of chemical media container with reference to the foreign sub-HG.20660 should grade Ⅳ according to GB5044 . for pressure vessels Ⅱ I-level (middle) Classification Class A 10 -

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