1、2 The energy-conservation of freezer, with automaticallying control 1 A present freezer of automatic control current situations Though the cold storage self-control having been popularized all round, but great majority cold storages putting particular emphasis on is only a safeguard face to face , t
2、he energy conservation having increased Wenku picking up the self-adjustment and cold storage measuring and controlling, to entire system relates that under the control of seldom or. Even if another aspect, already getting the all-round universal safeguard, before actual condition in working cant ad
3、mit of no sanguine, pins up the cold storage self-control facilities having become ear of the deaf person even having become furnishing and decorating decorating front appearance only. The Shanghai cold storage association has done investigation in recent years to Shanghai area ammonia refrigerating
4、 system cold storage safeguard and autocontrol condition , concrete conditions has seen that are what form l shows. A spot of should inquire into a data as the leopard has reflected current cold storage self-control general situation Form what 1 shows a self-control interposes and runs status though
5、 the very good cold storage only having 5 tidal current and direction accounting for 9% of the number counting, but it is these cold storages to have represented a nowadays. With the development of electron technology, the self-control component is more and more advanced , changeable procedure contr
6、oller (PLC) and the PC function are more and more strong , self-control procedure is more and more perfect, system optimization and the energy conservation consciousness are also more and more strong. The cold storage energy conservation and the autocontrol relation are more and more rapid and inten
7、se , need the cold storage energy conservation to be ready for and composing much better, do well in and be engaged in better the autocontrol vitally needing right away. Above-mentioned example adopted by five cold storages representing tidal current in the nowadays and advanced level has all got th
8、e pretty important effect to realizing cold storage energy conservation. 2 How be ready for cold storage energy conservation autocontrol Fundamental above-mentioned content starting point is the cold storage taking ammonia as all together style refrigeration working medium refrigerating system , is
9、that refrigeration working medium decentralization, allows all together style , all together style refrigerating system cold storage to have got very big development , whose self-control degree overtops also sometimes the all together style refrigerating system cold storage taking ammonia as refrige
10、ration working medium on behalf of a hydrocarbon with the thick gravy nowadays. Many working mediums are unlike cold storage of system of all kinds extensive use, content having enriched cold storage autocontrol tremendously, application in energy conservation at the same time also has provided the
11、vast scope for ones ability to autocontrol in the cold storage. 2.1 Cold storage energy conservation autocontrol Cold storage energy conservation autocontrol is energy conservation under the control of procedure establishment and self-control component selecting and using from the content coming to
12、study the autocontrol developing cold storage energy conservations relates that mainly whom. The firm, special field designing institute or capable unit as self-control component may assume cold storage energy conservation autocontrol research and develop equally. The firm and the designing institut
13、e make a contribution to some extent without exception already by now within that field. Cold storage energy conservation autocontrol can be developed exploitation commonly by firm and designing institute best (not bad firm give first place to, the designing institute coordinates) , perfects in the
14、process of putting into effect using an unit the new product getting into form and grinding unceasingly to get rich. 2.2 Energy conservation autocontrol specific items design prepares a cold storage putting 3 composition into practice. That a specific items energy conservation autocontrols puts proc
15、ess into practice sometimes is that the purpose checking K amendment , reaching energy conservation until according with design demand by designing , assembling debugging , pilot run , effect is extremely. While the project requires that content is changed into a ratio to some extent, may revise K a
16、t any time satisfying a request. The cold storage energy conservation sometimes requires that the advanced refrigeration switches over to prepare , right system mates , effective the words emergency measure and strict operation manage to manage to be put into effect, be requiring that the refrigerat
17、ion technician goes ahead in the basis optimizing refrigeration process design right now, know well that energy conservation needs , be tied in wedlock this project characteristic , the flow chart designing out entire cold storage energy conservation autocontrol. Ability accomplishes whose electrici
18、ty self-control design according to the self-control flow chart , the electricity self-control technician , being able to wield whose professional knowledge at the same time, makes self-control technological process be simplification and an optimization more. Cold storage energy conservation is a co
19、ld storage autocontrol important component , all cold storage autocontrol is composed of refrigeration and electricity two parts content without exception , K makes cold storage energy conservation be carried out to the letter only when ability makes cold storage autocontrol come into effect in the
20、field of two under technicians making joint efforts. 3 Cold storage energy conservation autocontrol pilot run is also one very important ring , echoes the usage unit and the special field firm in the pilot run keeping close connection , uses an unit to discuss working effect , deliberates amendment
21、measure with special field firm and. Energy conservation is one of cold storage autocontrol purpose. 3.1 Adjusts storehouse temperature adjustment in the past about that the storehouse temperature and the evaporation temperature adjust the parametric storehouse of 3.1.1 Storehouse temperature contro
22、l Multiple spots temperature temperature giving first place to dyadic adjustment of place, correct evaporate the temperature not sometimes doing adjustment , very difficult to reach good energy conservation effect. The ideal storehouse temperature control mode is that wind and their air-out temperat
23、ure is entering parameter with the storehouse mean temperature , the air cooler moving forward , works out appropriate under the control of procedure , measures by the fact that PLC is in progress. So-called Wenku adjusts the request being able to reach energy conservation , also can satisfy the nee
24、d that some storehouse high-accuracy temperature adjusts, self own but the accuracy reaching 0.250 C requires that energy conservation makes an appointment with 10% at present. 3.1.2 Regard to relatively evaporate temperature higher cold right away be in no energy conservation operation state Ps sto
25、p being unlike the diversity evaporates because K couplet operation can only work under evaporating the temperature with a with a systematic refrigeration compression engine evaporating the cold room of temperature temperature cold if K couplet work, with regard to relatively evaporate temperature h
26、igher cold right away be in no energy conservation operation state, should cold hot load increasingly be promoted to a higher post increasingly no energy conservation. Ought to try ones best to avoid this condition appearing. One machine reviews the cold storage method of work pair in freon refriger
27、ating system , add the back pressure valve on time of high temperature warehouse air tube , add single check valve on time of low temperature warehouse air tube, be representative block of wood energy conservation method of work, do not respond to encourage but suitable abolish. 4 3.1.3 Unexpected t
28、urn of events evaporates temperature adjustment Some one work state lower if evaporate temperature can use storehouse hot load and refrigerating system refrigerating output be parameter be in progress adjustment, then now that can reach energy conservation purpose can make energy adjustment be more
29、rational. The sort Er Yan , refrigerating system evaporation implement and refrigeration compression engine equipment can satisfy maximal load need basically all. Load falls off but the refrigerating output can not make corresponding adjustment in time if the cold room is hot, the refrigerating outp
30、ut and hot load being that the refrigerating system evaporation temperature will may act in responses reduces , uses a compression engine reach a new balance burning. The lessening evaporating the temperature has increased but the refrigerating output evaporating an implement conversely but , has fa
31、ced the hot load that self own cuts down taking form surely frequently opening the consequence staying. Evaporate temperature 10 C per change, electric energy about 3 5% acting in responses adding or subtracting. Be energy conservation on making system burn in another ideal balance of if raising the
32、 evaporation temperature in time,have avoided freely not having achieved not only, having decreased by the refrigeration compression engines frequently starts , is the energy conservation measure achieving two things at one stroke. Not changeable fundamental refrigerant rate of flow rate of flow eva
33、porating an implement adjusts. 3.1.4 Changeable rate Changeable rate of flow adjustment ammonia in the past refrigerating system； Freon system evaporates the implement refrigerant rate of flow , great majority achieve simple proportion measures. The air cooler air mass flow great majority do not mea
34、sure or speed and the electric fan platform number measure only when two. This two kinds parametric rate of flow adjustment all are cold the adjustment assigning the equipment refrigerating output and storehouse temperature direct relevance , one of the content being also that the cold storage energ
35、y conservation self-control responds to in taking seriously with the storehouse. 3.1.5 Fetch the warehouse taken height Sets up right under the control of accuracy and adds the storehouse temperature setting up the commodity and different storage period controlling the different storehouse , differe
36、nt stock out of gauge having no equal to and their under the control of accuracy request. Set off from the energy conservation angle, the storehouse temperature ought to take height not choosing low , the mild high-accuracy controlling accuracy ought to fetch the warehouse taken height , insisted to
37、 run after face to face unnecessarily low low controls as long as not affecting the commodity quality. To the cold room of many storehouse temperature under the control of, except original storehouse temperature setting value, suitable add set up Kuwen transfinite controlling value. This pair of fac
38、tors storehouse temperature adjusts deflect but premature bringing into service being able to achieve when refrigerating system needs bringing into service , incapable because of pins up the storehouse temperature； Can not make cold according to reality that time at intervals, refrigerating system s
39、tops working untimely Ding , fully utilizes now having energy K avoid equipment or systematic frequently open Ding. 3.1.6 Set up avoiding meeting high o peration Interpose avoid meeting high o operation under the control of electric power short-supplied be the universal phenomenon that current all p
40、arts of the country there exists in everywhere, huge bad especially heavy electric power of power consumption o grain is short-supplied , the electric charge o grain price differences puts into effect in a lot of city and price differences play big as early as successive steps for this purpose. Unde
41、r the premise not affecting commodity mass, the cold storage is set up avoiding meeting high o peration , beneficial to the electrified wire netting cuts o repair a valley , help overall situation energy conservation on macroscopic view； Microcosmic Er Yan operation also beneficial toreducing a cold storage cost.
