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Probably the current situation of excessive construction and exorbitant standard is about to make clean room in the past, at least, at present the researcher of project of energy of Lawrence Berkeley Labs reachs manager Tengfang (Tim) Xu has method to change the current situation. "Theoretic tell, every raise air current rate 10% , the specific power consumption of fan will increase 30% . If wait for all sorts of equipment scale cut to enough keep specific power consumption of contaminative pilot lowest, economic and many energy resources. " as environmental science and technical institute (IEST) " approach expert " the one part of series course, xu was opened through the network recently " can last of clean room design and operation development problem " . Course is aimed at clean room and small environment (ME) program, design, construction, operation until exit, from can develop angle to put forward a few proposals and guidelines continuously. Manufacturing facilities wastes the energy of 1/3 of whole and clean room normally, refrigeration and pump riverside system are used up again 20% , air circulatory system uses up another 20~30% . The rest part is used at support to go fan of the water pump that ionic water and other production use water, exhaust, nitrogen generates equipment and other to assist device. Clean room is different extent is real gentle style switch leads air velocity of flow can put in very big difference, some area demand is one-way air current, and other area criterion otherwise. Xu gave out a few concrete example: Almost the in part is clean grade still has one share for the clean room of 4 class the ME that clean grade is 3 class is put in the problem with exorbitant standard, of the ME in basically expressing standard of current now industry recommend aeriform velocity of flow and difference of intensity of pressure. It is to cause the cause with this kind of exorbitant standard to the fear of the risk and too conservative design thought. Since some kind of program can work once upon a time,the commonnest opinion is, why be changed even? Xu puts forward to be used in level of clean chamber program classification the method that gathers information, can be opposite so of the plan decision-making provide guidance, waste the sources of energy as important parameter considers to go in. In the meantime, be aimed at certain and specific system, xu gave out method of a few proposals (watch) , these methods already were updated in IEST-RP-CC012.2. He says: "Use the sources of energy better, can improve environmental quality. To clean room, from the angle consideration of an industry, efficiency of stability of energy utilization rate, equipment, production and the guidelines that did not come are met very big to active method generation impact. " at the same time, xu still encourages the personnel in letting whole technological process to participate in decision-making, decide such as jointly: Systematic dimensions (craft, machinery and electric and relevant personnel) , loss of low pressure pressure (machinery and structural design personnel) , the aeriform velocity of flow that has real sense with set asks (machinery and control personnel) . In another concrete example: Xu chose 12 kinds of different type 4 × 2 feet fan, through comparing its energy utilization rate, discover to very big difference exists between different type, the job that some are asking even works normally inside interval. To HVAC air system, the test project that needs a consideration includes: Rate of exchange of loss of low pressure pressure, appropriate air circulatory system, air, dosage is controlled filter, fan efficiency, fan filters unit and exhaust system are optimized. Xu points out, flow through optimizing the air of ME and clean room, below the condition that carries pair of grain to filter effectively, energy is used up can reduce 10~85% .
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