JPS5883193A - Heat exchanger - Google Patents

Abstract

PURPOSE:To uniformalize a flow and contrive to enhance heat-exchanging efficiency, by forming a bypass route by dummy tubes provided in a group of heat-transmitting pipes. CONSTITUTION:A fluid introduced through an inlet nozzle 11 is guided by buffle plates 2 to form a flow line in the group of the heat-transmitting pipes. In this case, stagnation regions are generated on the upstream and the downstream of the buffle plates 2. The dummy tubes 3 are provided at the parts where the stagnation is most marked. By generating jets by forming flow lines along the dummy tubes 3 in the stagnation regions, a turbulent flow condition is generated and the heat-exchanging efficiency is enhanced. Since the part where the greatest effect is expected is a dead space 7, when a high-temperature fluid flows from the inlet nozzle 11 to the position of the dead space 7 by flowing along the dummy tubes 3, a larger temperature difference and a higher velocity can be obtained, as compared to those obtained in conventional systems.

Description

【発明の詳細な説明】 本発明は、多管式熱交換器の熱交率の向」二を計るため
に、ダミーチューブを設けた多管式熱交換器である。DETAILED DESCRIPTION OF THE INVENTION The present invention is a shell-and-tube heat exchanger provided with dummy tubes in order to measure the heat exchange coefficient of the shell-and-tube heat exchanger.

従来の多管式熱交換器においては、胴体内の流動が、欠
円形バッフルを使用しているため、バックル板前後によ
どみ部ができ効率的な熱交換ができない。又、胴体ノズ
ル取付上よシできる管板面近くの部分が、有効な伝熱面
積として使用できないデッドスペースが生ずる。In conventional multi-tube heat exchangers, the flow inside the body uses a circular baffle, which creates stagnation before and after the buckle plate, making efficient heat exchange impossible. In addition, a dead space is created in which the area near the tube plate surface, which can be moved when mounting the nozzle on the body, cannot be used as an effective heat transfer area.

本発明の目的は、多管式熱交換器内にダミーチューブを
使用し流れを均一化し、熱交換効率を向上させることに
ある。An object of the present invention is to use dummy tubes in a shell-and-tube heat exchanger to equalize the flow and improve heat exchange efficiency.

本発明は、胴体内の流動において、流れがよどんで、伝
熱面積が有効に生かされていない箇所に胴体バッフルを
バイパスする流路を設け、よどみ領域における熱交換を
向上させるものである。The present invention improves heat exchange in the stagnation region by providing a flow path that bypasses the fuselage baffle at a location where the flow in the fuselage is stagnant and the heat transfer area is not effectively utilized.

第１図、第２図、第３図において、入口ノズル１１より
入った流体が、バックル板２によって、伝熱管内の流路
を形式する。この時に、バッフル板２前後によどみ領域
が発生する。このよどみの最も著しい箇所に、ダミーチ
ューブ３を設け、ダミーチューブ内の圧損を考慮して、
ダミ一つ一ユープ下流に行くに従い大きい穴を、よどみ
部に設けよどみ部にダミーチューブによる流路を形成し
て噴流をおこすことにより乱流状態とし熱交換率を向上
するようにする。In FIGS. 1, 2, and 3, the fluid entering from the inlet nozzle 11 forms a flow path within the heat transfer tube by the buckle plate 2. At this time, a stagnation area occurs before and after the baffle plate 2. A dummy tube 3 is installed at the point where this stagnation is most significant, and taking into consideration the pressure loss inside the dummy tube,
A hole that becomes larger as it goes downstream of each dummy is provided in the stagnation part to form a flow path using a dummy tube in the stagnation part to create a jet flow, thereby creating a turbulent flow state and improving the heat exchange rate.

最も効果が期待される箇所は、デッドスペース７部とな
るので、この位置までダミーチューブを伝わって、入口
ノズルより入った高温流体が流れることにより、従来方
式と比較し、大きな温度差及び、流速が得られる。従っ
て、デッドスペース７の熱交換量の増加が期待される。The point where the most effective effect is expected is the dead space 7, so the high temperature fluid that entered from the inlet nozzle flows through the dummy tube to this point, resulting in a large temperature difference and flow rate compared to the conventional method. is obtained. Therefore, an increase in the amount of heat exchange in the dead space 7 is expected.

本発明によれば、熱交換器の熱交換量が増加する。According to the present invention, the amount of heat exchanged by the heat exchanger increases.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は熱交換器全体と流動状態を表わした図第２図は
管板近くのデッドスペース部の詳細図、第３図はダミー
チューブ途中の開口部の状態図である。 １・・・伝熱管、２・・・バッフル板、３・・・ダミー
チューブ、４・・・胴、５・・・管板、６・・・水室、
７・・・デッドスペース、８・・・伝熱管、１１・・・
入口ノズル、１２・・・第１　図 第　　３　　目Fig. 1 shows the entire heat exchanger and its flow state, Fig. 2 shows a detailed view of the dead space near the tube plate, and Fig. 3 shows the state of the opening in the middle of the dummy tube. DESCRIPTION OF SYMBOLS 1... Heat exchanger tube, 2... Baffle plate, 3... Dummy tube, 4... Body, 5... Tube plate, 6... Water chamber,
7... Dead space, 8... Heat exchanger tube, 11...
Inlet nozzle, 12...Figure 1, item 3

Claims (1)

【特許請求の範囲】[Claims] １、多管式熱交換器の伝熱管バッフル板により形式され
る胴体内の流路において、伝熱管群中にダミーチューブ
を設け、このダミーチューブに流路のバイパスルートを
設けたことにより、熱交換器内バッフル部のよどみ防止
を行ない熱交率を高める、及び、管板面近くのデッドス
ペースを有効に利用することを特徴とした熱交換器。1. In the flow path in the body formed by the heat exchanger tube baffle plate of a multi-tube heat exchanger, a dummy tube is provided in the heat exchanger tube group, and a bypass route for the flow path is provided in this dummy tube. A heat exchanger characterized by preventing stagnation in the baffle part within the exchanger, increasing the heat exchange rate, and effectively utilizing dead space near the tube plate surface.