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 Wysłany: Czw 0:37, 16 Gru 2010 Temat postu: stivali ugg Xiamen, cold storage and refrigeration |
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Xiamen, cold storage refrigeration equipment of the maintenance management and energy saving
1, No. 2 (total 95) exclusive Internet publishing site A, Next Food A http:ll ~ \ifoo ~ tom caused by heat and mass transfer, etc. at the same time a complex is generally believed that the heat transfer process, warehouse cooling discharge pipe and heat transfer can be considered by the: row of the air side of the outer surface of heat transfer: exhaust pipe conduction heat transfer wall and sediment; row of inner surface side of the convection heat transfer of refrigerant composed of three parts this time, sediment only consider the presence of frost resistance by ignoring the situation of other fouling resistance. According to the literature of computing, for ∞ 2x2.2 cooling pipes, when the frost thermal conductivity = 0.1163W / M. oc, tube heat transfer coefficient an = 11.63WIm2. oc, convective heat transfer coefficient a. = 349W/m2. oc, if the frost to 3 mm, frost-free than when the heat transfer coefficient decreased by about 10%. If the frost of 6 mm, the heat transfer coefficient will decrease by about 18% of the heat transfer coefficient decreases heat transfer (cooling capacity) decreased. Cooling requirements objects can not be met. If the request when the frost layer thickness of heat transfer (cooling capacity) is constant, according to equation (2), but Ling refrigerant and is heat transfer temperature difference between the air will increase. The evaporation temperature must be reduced survey found several evaporator cooling tube row of cold storage, a minimum of three months of the defrost cycle, defrost cycle, many of the survey once a year at least every plant frost thickness 6mm, generally In lOmm above, and some even up to 30ram above. Therefore, the time defrost control is a thin layer of frost in cold storage maintenance and management of an important part of energy conservation. 6, the conclusion of the Xiamen City survey found 10 cold storage, refrigeration system maintenance and management level is uneven. Overall, the generally low level of maintenance and management. It is noteworthy that the survey's ten cold storage, there are eight for the state-owned enterprises, have strong technical force. Cold storage technology managers to maintain the level of common understanding of the impact of energy consumption of the refrigeration system. For example, the condenser and evaporator fouling on heat transfer have an adverse effect frosting. But in the actual production, cleaning the condenser and evaporator defrost still not taken seriously enough. Many plants also developed a better maintenance and management procedures, but implementation poor. Thus, the level of refrigeration system maintenance and management level of the main factor is not technology, but rather the implementation is that the management system. There is no doubt, strengthen management, improve the level of maintenance and management of refrigeration system,[link widoczny dla zalogowanych], without investment in energy efficiency can,[link widoczny dla zalogowanych], bring significant economic benefits for the enterprise, therefore, to further strengthen management and improve the level of maintenance and management of refrigeration system, is the refrigeration business energy-saving imperative References 1. Yangxiao Can,[link widoczny dla zalogowanych], \National Aquatic Energy Collaborative Group, \Xiong Yan, advanced cleaning technology in the condenser on the application,[link widoczny dla zalogowanych], refrigeration technology, 1992,34. Zhang Zhi-right,[link widoczny dla zalogowanych], \Li Songshou and so on, \Hubei Institute of Architectural Design, \professional tools with disabilities book - \The book collection of more than 30,000 HVAC Glossary section, 32 open (international pop format), 500 pages, received word reference to the international refrigeration and air conditioning refrigeration terminology and foreign institutions and lntemet network of professional publications, although the new professional information. Refrigeration and air conditioning industry in China is currently accepting words than the whole, involving a wide range of content than the new vocabulary of the professional books. Content: This book received the scope of the word: refrigeration machinery, air conditioning equipment, frozen food processing refrigeration, cooling appliances (refrigerators, freezers, home air conditioners, cold drinks machine), refrigerated transport, ice, low temperature engineering, freezing and drying, cryogenic technology, Cryobiology, refrigerant and its alternatives, automation and related air-conditioning and refrigeration, thermodynamics, fluid mechanics, heat transfer, thermal engineering and environment and trade and other disciplines have common terms of color professional illustrations attached. Main entry is the basic refrigeration and air conditioning and common terms, some term development of the industry in recent years the emergence of new terms, the book with numerous color illustrations and professional formula commonly used in refrigeration and air conditioning conversion table. Order: book price 44 yuan (including postage), please post staples shall remit to: Security outside the street right-Beijing Chinese Business Technology Building 99, Room 917, \
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