【正文】 序號項(xiàng)目符號單位數(shù)據(jù)來源和計(jì)算公式數(shù)值1管箱法蘭材料的彈性模量GB1501998表F51911032管箱法蘭厚度JB/T47022000323系數(shù)GB1511999圖264管箱圓筒與法蘭的旋轉(zhuǎn)剛度參數(shù)=5管板邊緣力矩的變化系數(shù)=1/（/ +）6法蘭力矩變化系數(shù)=/ 7管板第二彎矩系數(shù)GB1511999圖28（a）G、按殼程設(shè)計(jì)壓力，而管程設(shè)計(jì)壓力=0，膨脹變形差r，法蘭力矩的的危險組合（）a、 只有殼程設(shè)計(jì)壓力，而管程設(shè)計(jì)壓力=0，不計(jì)膨脹節(jié)變形差（即r=0）。. 折流板的選擇 選型根據(jù)GB151—1999《管殼式換熱器》圖 37 選擇單弓形水平放置的折流板。12013容器與封頭的材料Q345R 14容器與封頭的許用應(yīng)力17015鞍座材料16鞍座材料許用應(yīng)力12517容器自重200018物料重量150019總重量3500沈陽化工大學(xué)學(xué)士學(xué)位論文 參考文獻(xiàn)參考文獻(xiàn)[1] 崔海亭,姚仲鵬,[J].石油化工設(shè)備,2001,30(2):3436[2] 方書起,祝春進(jìn),吳勇,[J].化工機(jī)械,2004,31(4):24925[3] [J].煉油設(shè)計(jì),2001,31(8):2833.[4] [J]. ChemicalEngineering,1986,93(3)[5] [J]. 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Wei Liu ?Weiwei Li Received: 9 July 2009 / Accepted: 3 March 2010 / Published online: 24 February 2011 SpringerVerlag 2011 Abstract A shellandtube heat exchanger with new typeof baffles, is designed, fabricated and tested. The experimental investigation for the proposed model and the original segmental baffle heat exchanger are conducted. Theoperation performances of the two heat exchangers are also pared. The results suggest that, under the same conditions, the overall performance of the new model is20–30% more efficient than that of the segmental baffleheat exchanger.1 IntroductionHeat exchanger is a very important apparatus in manyfields, such as petroleum refining, power generation,chemical engineering, process industry, food industry, the different types of heat exchangers, shellandtube heat exchanger (STHX) has many advantages such asreliable structure, mature techniques and wide applicability, which make it widely utilized in various industries [ 1 ].The baffle element plays very important roles in STHX,such as supporting the tube bundles and disturbing the fluidof shell side. According the direction of fluid flow of shellside, the STHX can be divided into three groups: transverse flow, longitudinal flow and helical flow. The characteristicsof pressure drop and heat transfer in shell side of the STHX vary under different flow states, which have a heavy impacton the performance of the heat exchangers.The traditional shellandtube heat exchanger with segmental baffles (SBSTHX) have many disadvantages, such as high pressure drop, low heat transfer efficiency, harmful vibration caused by the shellside flow which is normal to tube bundles. When the traditional segmental baffles areused in STHX, higher pumping power is often required tooffset the higher pressure drop under the same heat , a new type of STHX using different types of baffles might achieve higher heat transfer efficiency and lower pressure drop. Pressure drop and heat transfer are two interdependent factors influencing the capital and operating costs of the heat exchange systems. In order to improve the performance, heat exchangers with different types of baffles are developed, which have relatively higher heat transfer efficiency and relatively lower pressure drop,such as rod baffles and helical baffle exchangers [ 2 – 11]. Therefore, the main objectives of this study are to develop an STHX with new type of baffles to overe the deficiencies mentioned above and to experimentally investigate its performance. Moreover, performance of the new STHX is also pared with that of SBSTHX in this study.The dimension of the heat exchanger isU159 mm 95 mm. The detailed parameters of heat exchangers are shown in Tables 1 and 2 .2 Configuration and fabrication of the STHX with new type of bafflesThe helical type of fluid flow in shell side of the STHX with helical baffles has led to some advantages such as high heat transfer efficiency and low flow resistance [ 5 , 6 , 8 ]. Nevertheless, it is difficult to manufacture the continuous helical baffles. In order to address this problem, flowerbaffles STHX (FBSTHX), a new type of STHX based on the traditional segmented baffle, is proposed in this paper and shown schematically as in Fig. 1 . As seen in Fig. 1 ,around baffle can be divided into four quadrants, and among the four quadrants, at least one quadrant is hollow for fluid flowing, and the remaining quadrants are used to support the heat tube. As the flower baffles are installed alternately, the phase angles (the angles for hollow parts of the two adjacent baffles) can be 30,60 ,or90 . Under different application situations, the phase angles may vary. From Fig. 1 it can also be observed that the configuration of all baffles in FBSTHX is the same。 R o, fouling coefficient for shell side, (m2K)/W。 L , effective length of tube, m。 A , heat transfer area based on the tube out diameter, m2, which can be calculated using Eq. 4 .N, tube number。ho , heat transfer coefficient for shell side, W/(m2K)。水壓試驗(yàn)比較筒體的水壓試驗(yàn)和短節(jié)的水壓試驗(yàn)同樣可以滿足要求。