Current Situation and De都得velopment Trend of Fishing Vessel Refri坐媽geration Technology

Shandong Friend Refrigera子城tion & Air Conditioning Co.,身城 Ltd. is located in Shidao, Rong有笑cheng, a coastal city with be近草autiful mountains and ri懂電vers. Current Situation and Develo身資pment Trend of R在了efrigeration Technology "C討看ertificate of Ap外樹proval of Fishing Vessel Con議離struction and Rep水習air Factory", with術現 the qualification o裡們f "Install上土ing Refrigerati睡件on System of Various F資暗ishing Vessels&習開quot;. It has the productio店鄉n qualification and capability o還花f marine pressure vess匠有els and marine refrigeration a學報nd air-conditioning products, 南司and the refrigeration and air-con子們ditioning products have passed 慢風the inspection and approval中火 of CCS. The main prod見北ucts are refrigeration, air conditioni喝我ng, ice making and othe慢大r categories, which are widely used in樂你 various ships,姐冷 especially fishing boats.

The developed fishing boat refrigerat答人ion equipment is favored 下討by users and widely used短是 due to its superior performa坐呢nce, reliable quality an機放d long service 兒們life. The products have 遠和been sold to Southeast 村東Asia, Africa, South A舊章merica and other countries and 到動all over China.

The company has professi城要onal and technical personnel a到雨nd high-skilled workers such a能作s ship engineering, r一空efrigeration and ai我店r conditioning, mac現議hinery, and electricity, form舊木ing a strong team for男國 product development and tec暗路hnological innovati了西on; it has modern workshops and p車拿roduction equipment that produce fir舊媽st-class products, w章窗hich ensures the high quality of prod西紙ucts. high performance

The company has established a sound快好 quality management system and ha科如s been operating effective懂慢ly. The company regard線下s reputation and 朋上product quality 刀綠as its own life, and alwa得個ys adheres to the quality po笑用licy of "strive fo快睡r excellence, excellence, thoughtful s要相ervice, and high quality",人女 and strives to provide customers wit家煙h first-class products and services問吃.

Shandong Rongchen什校g is located at the easternmos聽就t end of the Shandong Penins員對ula, where not 資生only is the landscape beautiful, b訊了ut also brings togeth熱就er the Yellow Sea Shipbui自在lding, Rongcheng Shipbuildin話數g as the leader, Yuantong Shipb服光uilding, Baibuting 購物Shipbuilding, Dayu Is金可land Shipbuilding, East China S公人hipbuilding, Xinyang Sh麗兒ipbuilding , Shidao Donghai Ship照西building, etc. ar業信e the backbone of a gr科體oup of fishing boat ma人喝nufacturing enterpr對從ises, which can be called ocean-離見going fishing boat construction base筆南s. The fishing boats built by Rongch事睡eng are widely favored due to 國身their advantages of large drag fo醫上rce, large cabin ca錯都pacity, large freezing capacity and紅場 high comprehensive economic benefit器麗s, and have spread時謝 all over the world in fis弟時hing grounds.

2. Development h費機istory of fishing vessel refrigeration 校和technology:

With the changes of fishery p書房roduction and fishery market, fi大拿shing vessel refrigerati高慢on technology has gone thro答業ugh several periods: Initia到生l development per筆讀iod in the 1980s—r有化epresented by 8154, 8160, 8163討如 and other vessel types, ge草影nerally equipped with two 810 se理章ries piston refrige些器ration compressors, 0.96 我年There are two aluminum alloy flat pla我城te freezing machines per ton/time, wit謝事h a daily freezing capacity of 8 to黃林ns. Depression period in the 1990電老s - during this period, the numb會湖er of newly built 著就refrigerated fishing boats was rar暗紙e, and the supporting ref習唱rigeration equipment dev機西eloped in the direction of睡紅 miniaturization and simplificat照金ion. The stable development period fr線紅om 2000 to the present - after years 鄉從of development, fishery公藍 enterprises have accumulated a cert海員ain amount of capital, and w吧弟ith the support of some鐘醫 policies, the number of newly buil街問t and renovated frozen fi呢子shing boats has increased rapidly, and 林那the requirements f市身or the freezing capacity of fishing子風 boats and the quality of fish preserv高南ation are required. With the continuous習都 improvement, the technical leve熱現l of refrigeration equipme理能nt and the design level of refrigera東話tion systems have been 銀跳developed rapidly. During the大日 stable development peri男河od, there are mainly HC837, HC86答姐7, RC879 and other repres西熱entative ship types.子很 Generally, it is equi冷笑pped with two 812.5 seri視風es piston refrigeratio遠舞n compressors a北大nd two 4.2-ton/time aluminum一火 alloy shelf blowing and freezing 關舞devices, with a d務用aily freezing capacity o綠他f 24 tons. After 2010, these repr體司esentative ship typ聽謝es were gradually changed to be eq西林uipped with one CYJZ-2X125A marin理通e semi-hermetic screw compr北關essor unit and two 4.8-ton/他放time aluminum alloy市們 shelf blowing and freezing devices厭公, with a daily freezing capacity of 30舊年 tons.

3. Development sta工科tus of fishing vessel refrigeration t中得echnology:

Freezers play an男遠 important role in fishing boats. E著務specially in ocean-going fishing 事分boats, the performance and ef熱聽ficiency of freezing devices not o內快nly affect the fresh-keeping quality o體務f the catches, but 哥從also directly affe媽務ct the output of fishing boats,紅開 especially for f購音ishing boats operating in resour我看ce-rich ocean-going fis畫暗hing grounds, their 自友production capacit購能y is directly determine鄉綠d by their freezing pro件黃cessing capabilities. Decide動說.

The freezing processing capacity is 雨花mainly restricted by the technical pe場動rformance of the r數可efrigeration equipment. Traditi了技onal freezing devices have defects su學匠ch as uneven liquid supply光空, slow freezing speed, and troub通音lesome operation子拍; aluminum alloy freezing devices 樹火have disadvantages suc這從h as rapid corrosion and shor村分t service life;如門 traditional piston refrigerat哥紙ion compressors cannot m東工eet the actual freezing cap議得acity requirements; traditional說什 ultra-low temperature refrigera鄉城tion technology It has been in the sy也志stem for decades, and has no公雜t been improved and d銀科eveloped. The econ店外omical operation of the refriger章見ation system is low; there are many 懂關unreasonable facto對筆rs in the design of the refri術區geration system of fish亮得ing boats, and some designs h議自ave great misunderstan來動dings. These unfavorable factors not on街購ly seriously waste resources, incr木開ease manufacturing costs, 事見and directly affect the e鄉暗conomic benefits of fishing放照 boats, but also ser哥你iously hinder the further prom林生otion and application of refrigeration 事分technology on fishing boats.

In response to thes現笑e problems existing in tradition暗來al refrigeration technology, we have微去 carried out some discussions an人到d improvements, m視也ainly in the following aspects: 呢討1. Application of 議錢new technology to improve freezing 和兒device

There are three main ty綠畫pes of tradition呢子al freezing devices: a兵也luminum alloy flat plat日我e freezing machine, aluminum al家兒loy shelf blowing freezi很遠ng device, and st金水eel pipe shelf blowing freezing 用年device

In view of the defects of uneven liqu件習id supply, slow freezing speed,些書 and troublesome operation時時 of traditional freezing device著一s, pay attention to 車家the use of produc窗不ts, research an河拍d discover the causes of existing p開她roblems in a timely manner, and ap黃海ply a number of new technologi新自es and proprietary technologies器我 to make freezing T了市he device has fa鐵草st freezing speed, uniform temperature 船得of frozen products, hi子購gh quality of frozen民也 products, stable and reli嗎森able work, and convenient operat月很ion. The freezing time of長制 the improved aluminum alloy plate fr錯南eezer has been shortened from懂新 5-6 hours to 3.5 hours愛看; the freezing time of the aluminum a子市lloy shelf blowing fre鐘舊ezing device ha紙分s been shortened from the ori嗎快ginal 8-9 hours to 5-6 hours慢笑, and the freezing efficiency 新近has been increased by 50%. % o車是r more; the thermal expansi哥們on valve is used to au訊什tomatically supply liquid 商站to ensure the stability and reli車資ability of the ent術南ire freezing process.

Aiming at the prob民國lems of rapid corrosion and shor制村t service life of the aluminum allo美器y freezing device plate,身體 the surface of the aluminum alloy plat間嗎e is strengthened with a process 著外to make it resistant to 物讀friction and co電微rrosion; using a unique weld街黑ing process, the welding seam is bri老離ght and beautiful, and t笑話he corrosion resistance is strong, 照一which is consistent with the Other p務他roducts on the market are qui場吧te different. The aluminum alloy free購暗zing device we inst日如alled in 2000 is st鄉筆ill in normal use, and there is no p兵文roblem of flat plate corrosion.

For more than ten靜拿 years, the refrige少謝ration equipment and refrigeration syst城懂ems we have ins謝老talled on the ship 可如have been tested for many years, whic放兵h proves that they have high perfo聽懂rmance, few failu雨玩res, and convenient oper我數ation and management. Love and g上空reat support. All users who西拍 have used our products and those wh車那o know about our produc長窗ts will name and request 北知our company'光費;s products or the refrigerat舞哥ion system matching and installati水厭on by our company when they build new笑筆 fishing boats or坐綠 renovate fishing bo風一ats. In recent years, our company ha通路s more than 200 fishi民草ng boats supportin鐵見g or installing refrigeration equipme美還nt every year.

2. Application of semi-h他分ermetic screw ref數農rigeration compressor

With the develo媽城pment of ocean-g女了oing ships, the呢歌 original piston compressors cannot me場銀et the new requiremen歌輛ts in terms of cooling capacity 拿個and cooling efficienc動票y. In 2010, we began to research and d銀懂evelop marine screw compressor uni森低ts, using semi-hermetic screw compr件通essors of BITZER and other brands to 線公assemble them i議司nto units suitable for 男哥marine use. This unit has a compact st村匠ructure, takes up little sp黑廠ace in the engine room, h那問as a large cooling capacity, and ha可算s a strong overload ca在快pacity, which is especi這去ally suitable for微這 large freezing capacity require鄉飛ments; because it can work 子和in a higher evaporating務匠 temperature range, t視作he cooling coefficient is large, the co水船oling efficiency is significantly 女商improved, and the energy saving effec上但t is remarkable; Fewer moving 資知parts, low maintenance cost; easy opera可醫tion, high reliabil技章ity and long service life.

Application of semi-h習黑ermetic screw compre化都ssors: In 2011, 8 sets of ships were us化現ed; in 2012, 16 為樂sets of ships were used; in 2為她013, 65 sets of ships 好間were used. At present, it is 快鐘also widely used in低煙 multi-type large謝光-scale ocean-going trawlers,日快 ocean-going squid 輛樂fishing boats, and ligh員個t-covered net fishing影下 boats.

3. New ultra-low temperatu家技re refrigeration scheme近中

The traditional tuna fishi哥件ng boat ultra-low temp少拿erature refrigera你電tion system gene視裡rally uses an open妹月 piston refrigeration comp他空ressor with R22 as the refrigerant. A黃愛fter decades of prac學門tical applicatio就拍n, the refrigeration compresso業視r has high reliability and 林秒long service lif湖筆e, and can meet the requirements of 有下refrigeration below -50 ℃ Tempe票音rature requirements (evapor子錢ation temperature -60 ℃). Howeve暗會r, when this refrigeration compresso子生r uses R22 refri錢車gerant, the eva問看porating temperatu我海re of -60°C 腦水is close to its working lim理服it, and it is di站風fficult to reduce理小 the evaporating tempera現為ture or the cabin temperature; in ad黑要dition, when work什靜ing at this evaporating temperatu哥銀re, the refrigeration coefficient of th器銀e refrigeration compressor is自能 relatively high. Low, 黑店that is, the same compress劇草or has a smaller cooling capacity 不拍and a long working time, resul看從ting in a lower economy of the entire很拍 refrigeration syst技現em.

In view of the abov們內e situation, we 弟用have researched and de火相veloped a new ultra-low temp醫家erature refrigeration schem這數e. The ultra-low temperature refri對樹geration system using semi-hermetic r樂她efrigeration com關黃pressors of BITZER and oth海湖er brands and R404A as the refrigera照間nt is a new ultra-low temperature r海但efrigeration scheme that effectively 都廠applies the advantages of modern tec家暗hnology, which can over樹玩come the above-mentioned trad請司itional ultra-low temperature refriger醫店ation schemes with low refri不可geration coefficient and poor opera光劇ting economy. weakness. 遠好First of all, when the refrigerati來影on compressor uses R404A錢劇 refrigerant, the evaporatio很少n temperature in the permitted wor藍鄉king range can reach -70得煙°C, and it is very 亮問easy to reach t南書he cabin temperature of 拿科-50°C~-60°C; it also works u討雨nder the evapora北爸tion temperature cond秒國ition of -60°C, 有在Its refrigeration coefficient is inc兵但reased by more than 40% compar著會ed with the use of R22 refrigerant; ag謝嗎ain, multiple compressors can b新在e used to form a parallel 男小unit, and the number of 書來refrigeration compressors上又 can be determined accordin嗎議g to the needs of different 呢還working conditions, and 拿雜at least one compressor (m信個otor) can be tur能老ned on. Power 22KW), ca山器n save energy consumption;

BITZER semi-hermetic refri司在geration compressors銀子 are of good quality, stable 腦歌and reliable operation, and have a lo學訊ng service life. Due to the semi-h花報ermetic structure, the d錢購isadvantages of s離城haft seal leakage are avoide機女d; due to the high i坐跳ntermediate pressure of 子空the crankcase, 唱學the operating oil under ultra-low吃歌 temperature conditions i樹作s guaranteed. Stable and re的土liable pressure.

Application cases of new ultr錯鐵a-low temperature refrig章又eration solutions雪離:

1. In 2009, the MC8302 39.8m tuna fi畫大shing boat was designed and eq看暗uipped with a new黑下 type of ultra-low tempera新低ture freezing device暗志, using 4 sets of S6F-30.2Y semi-h笑場ermetic refrigera光藍tion compressors and R404A refri匠車gerant. This type媽從 of ship (Zhongrong 13 and Zho習通ngrong 15, a total of 2) was delivered朋朋 for trial delivery in January 算知2010, and went 訊服to Fiji fishing grounds到公 in April. After nearly four ye飛去ars of operation, it has been pro火跳ved that the effect of 鐵大the refrigeration 長飛unit is very satisfactory, the f訊紙reezing quality of tuna has been highly慢雜 praised by cust南明omers, and it has obtained a good pric慢河e; the average fuel consu麗計mption of the ship is about 800KG/day, 海中and it has achieve還電d good economic benefits.

2. In 2011, the都門 WJY8028 42.8-meter tuna動劇 fishing boat was desi城生gned and equipped with a new type 身就of ultra-low temperature freezing devic要坐e, and 6 sets of開湖 S6F-30.2Y semi-herme人外tic refrigeration compressors we聽計re selected in paralle議空l, and R404A refrigeran慢低t was used. The算場 parallel unit is designed to cooper音小ate with the refrigeration學西 system and is divided int笑理o an ultra-low temperature sy國事stem and a normal temperature syst藍慢em. The two systems work at different e火人vaporation temperatures, 男農which not only meets the req司亮uirements of different working cond站紅itions, but als唱如o maximizes the refrigerati公章on coefficient of the refrigerat又資ion compressor. Improve the economi科女cs of refrigeration systems房現. If the ship is equipped with t要門hree ultra-low temperat木美ure refrigerated師讀 compartments, in the earl裡房y stage of each voyage, the司分 rear can be refrigerated.

The tank is incorporated into 員木the ultra-low temperature我學 (evaporation te白鐵mperature -60°拿民;C) system to keep 在廠the cabin temperature below -50°C 件舞for storing ultra-low temperature fi學志sh; while the front refrige裡笑rated compartment is incorporated into冷亮 the normal tem小我perature (evaporati個現on temperature -45&坐市deg;C) system to maintain - The cabin t森北emperature of 35°C is us站媽ed to store bait上中 or ordinary temperature fish些光. At the end of each voyage近煙, the front refrigera你靜ted compartment can also be i有門ncorporated into the u南件ltra-low temperature system to紙工 meet the requi從花rements of ultra-low t作章emperature refrigeration

There are 4 freezing devices, each of 玩玩which can be incorpora雨拿ted into the ultra-low tem謝訊perature system or into 山高the normal temperature syst輛遠em. Fresh fish can be frozen first in 說裡the room temperature system f但對reezing device to maintain a hig錯算h refrigeration efficiency. When the t資光emperature drop你說s below -35°C, th新火e frozen fish will be transferred to 黃得the ultra-low temperature system freezi也綠ng device for fur靜術ther freezing, ens友外uring a lower temperature. Freezing美下 temperature and better freezing quali報山ty.

This type of ship (Rong D學還ayang 16, Rong Dayang事廠 17 and Hongyang 8, Hong站河yang 9 total 4 ships) went湖讀 to Fiji fishing 現又grounds in July and August 20懂相11 respectively. After nearly three ye行鐘ars of operation, it has b為拿een proved that the refriger風志ation unit operat那媽es stably and re南從liably, and the average fuel和妹 consumption of the頻慢 ship is less t海能han 1000KG/day. The aver謝看age fuel consumption o作這f similar ships using the tradit船時ional ultra-low temperature refri子習geration scheme is 1300~1400KG/d兵大ay.

Since 2010, a total of 61 new ult林錯ra-low temperature re離笑frigeration units have be物村en installed for tuna fishin內離g boats, including 2 in 2去見010, 8 in 2011, 17 in 2012, and 34 in 去輛2013. Better resu在低lts and better econo高吧mic benefits.

The technical and economic ad信算vantages of the new ultra-會店low temperature refrigeration sche科但me are very obvious. After the a白用ctual test results of mult到行i-type ships, the ultra-low temper商上ature refrigerated cabin h冷醫as a fast cooling speed and唱在 a short freezing分醫 time; the use of the new ultra-low 多少temperature refrigeration s還船cheme for the same type of tuna fish作子ing boat can save關習 more than 40% of fuel compared 黃草with the traditional ultra-l畫機ow temperature refrigeration scheme唱匠. All users who have used the new ultr體南a-low temperature refrigeration sch樹如eme have given high e站西valuation and obtain身道ed good economic benefits. It is 答歌estimated that only by savin小習g fuel consumption,藍得 each ship can inc火開rease economic bene購的fits by about 1 mil不舞lion yuan per year. In a玩東ddition, the benefits of r窗慢aising prices due to the good quality間區 of fish are also considerab快吃le. The new ultra-low temperature 懂上refrigeration solution 草歌is more and more re作明cognized and accepted by m靜視ore shipowners, and it also create工快s more value for more shipowners.

4. Problems and solutions in re亮門frigeration syste用爸m design

With the developm中文ent of pelagic fisheries, the demand fo問劇r pelagic fishing vessels ha服姐s increased, and the requirements for t場師he refrigeration technology of fish務對ing vessels have been continuously 遠做improved. Relevant ship design institu黑從tes and refrigeration equipmen民會t supporting enter船鐘prises have con東坐ducted some discussions on 房高the refrigerati土討on technology of fishing boats. 風村Some discussions have pl報件ayed a role in promoting the improvemen時房t of refrigeration techno關劇logy for fishing vessels, while oth海錢ers have not play訊文ed a role in promoting, and even enter腦妹ed some misunderstandings. Ac短睡cording to our investigation 門車and understanding, we believe t呢議hat there are still the follo對草wing problems in the applica友鐵tion of refrigera理還tion technology for f靜也ishing vessels:

1) Some freezing device products 雪如have defects such a友裡s low technical content, 匠媽slow freezing sp高公eed, and low quali不藍ty of frozen products; the aluminu農紅m alloy plate begins to地會 corrode at an early stage, causing 船間refrigerant leakage an靜也d affecting the老木 normal operation of fishing bo讀身ats. Therefore, some ship owners友訊 dare not use alumi視對num alloy refrig長能eration and fre還雪ezing equipment.

2) There is a misunderstanding in the d睡腦esign of the refrigeration system 體慢of the fishing boat. I微行n some cases, the thermal expansion v物很alve used for freezing equipment has你錢 problems such as uneven長制 liquid supply, slow free場森zing speed, and easy liqui懂頻d return. In order to improve友得 the freezing efficie飛西ncy, a low-pressure circulating bar行民rel is used instead.

Fluorine pump liquid supply sch放慢eme; some in order to achieve autom相一atic operation, the design o用們f the refrigeration 窗你system is too complicated.師金 These designs not only greatly如暗 increase the cost, but線時 also increase the difficul能紙ty of operation and些近 maintenance.

The low-pressure circulati唱雜ng barrel plus p下樹ump liquid supply scheme is suitab空電le for ammonia refrig多玩eration systems and is us聽船ed in fluorine refrigeration s民銀ystems. Due to the characteris們可tics of Freon refr房飛igerants, the lubricating oil and r體行efrigerant are in 是南a mutually dissolving state, a子男nd it is difficult to separ件理ate them in the lo弟我w-pressure circula裡制ting barrel, even if some measures 業訊are taken. It is 風雜also difficult to recover lub對嗎ricating oil nor輛音mally, which in turn affe體銀cts the cooling effec務窗t. There are many c靜微ases where applications 金飛have to be removed after a while.

3) There are other problems in the de科時sign and installation of th舊低e refrigeration system. In 唱離response to these probl計姐ems, I once published the article男員 "Several Issues Concern民唱ing the Refrigeration System農時 of Fishing Vess師朋els" in the fourth issue of &qu舊睡ot;Fishery Machinery and Instruments&qu吃公ot; in 1994. Now it seems男是 that this article has刀年 practical significa術刀nce.

China's fish新都ing vessel refrigeration technology ha頻可s developed rapidly after s器章everal generatio海器ns of continuous 事熱research, exploration and innovatio我錯n. Especially after the stable做林 development period from 20作風00 to the present, a number of excelle笑他nt refrigeration equipmen樂劇t manufacturing and sup行知porting enterprises hav上新e emerged, and a ser去坐ies of products with 業得high technical level, excellent perfo店資rmance, stable and reliable quality hav什暗e been launched, which have well met 章線the needs of frozen fi化刀shing boats. Promote the develo麗行pment of distant子我 water fisheries.

Looking back on 讀頻the development and application o離上f fishing vessel refrigeration tec兵務hnology, I deeply realize the多答 contribution of private東件 enterprises, especially priv要公ate fishery enterprises, to the advanc飛算ement of fishing vessel refr們去igeration techn年要ology. They have the guts and co房坐urage to be the fir如國st to eat crabs; they focus on practic月志al results and value pract議拍ical benefits. Many new techno藍資logies and new equipment are of內少ten first tested and app書制lied in private fishing boats, and can 兵資be quickly promoted i站器n private fishing boats. Because of the民水ir bold applica黃用tion, it has promote雨業d the progress of re熱請frigeration techno人公logy for fishing boats.

Fourth, the develo子水pment trend of fishing 下聽vessel refrigeration technology:

The development 中舊of fishing vessel 用黃refrigeration technology is insepara白村ble from the actual nee睡不ds of fishing vessels and the花女 needs of fishery develop術師ment. As the departments an得區d enterprises su廠我pporting the research of refrigeration為市 technology for fishing vessels and 坐城the production of refrigeration e線畫quipment, not only must they b通白e able to meet t爸銀he actual needs, but the聽我y should also be closely li又兒nked with the application 小大practice, and explore and resea樂爸rch the products that are more suitable湖森 for the development of fi吧雜shery, especially for oc些動ean fishing.

New technologie報報s and new equipment for the d用文evelopment of the industry. To this end器能, we believe that explor是我ation should be s來新trengthened from the followin懂區g points:

1 Strengthen the拍新 scientificity and practi場還cability of refrigeration s他醫ystem design, and maxi但家mize the economy and reliability of玩著 refrigeration system玩們 operation.

2 Explore technologies and compl笑務ete sets of equipment for 校習direct and refined processing o黑科f fish catches on fishing boats wi體區th frozen processing兵黃 as the core. Make full use of the道多 advantages of high freshness資短 of the fish on board, maximiz場多e the quality and 麗機value of processed products 報著of the fish, and improv答紙e the economic benefits畫體 of fishing boats.

3. Strengthen the complete set, modular白些ization and standardiz資的ation of refrigeration equi短電pment, and improve the quality 畫有and reliability of refrige訊票ration equipment.

Conclusion:

We believe that: at present, Ch雨舞ina has the world's f水劇irst-class fishing vessel re又還frigeration technology and pr能少oducts, and has the abil的為ity to compete in the wor兵答ld's fishing vessel refrigeratio什湖n equipment market. We hope to prov和票ide high-quality refrigeration equipmen土道t and advanced refrigeration technology頻拿 services for more fishing boats, and得鄉 make due contributions to t技空he development o區姐f my country's fish姐鄉ery economy; contribu司制te to progress.