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国:
China
モデル番号:
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パッケージの詳細:
Wooden box
納期:
face to face
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連絡先担当者 Mr. ALLEN
168 Jixin Road, Shanghai, Shanghai
Twisted tube
Twisted tube is a kind of enhanced heat transfer tubes that firstly presented by Swedish Alards Company, and then improved by the USA Koch Heat Transfer Company, LP.
Fig. Structure of twisted tube | Fig. Twisted tube with carbon steel, stainless steel, copper |
Structure and manufacture of twisted
tube
The structure feature
of twisted tube is that every cross section is an oval, when when
assembled into heat exchangers they exchanger they can be mixed
bundles (that is, the mix of twisted tubes and bare tubes), and
also can be a pure twisted tube bundle.
The manufacturing
process of twisted tube includes:"partial pressure" and
"distortion". The tubes cross section is nearly an ellipse, of
which the ratio of long axis and short axis is designed according
to the flow velocity in tubes passes and shell passes of heat
transfer tubes. When the flow rate in tube pass is low, the ratio
of the long axis and short axis shall be increased, or the flow
surface shall be reduced in order to increase the flow
rate.
Enhanced heat transfer principles of twisted
tube
The unique structure
of twisted tube can make the flow in tube pass and shell pass in
the spiral motion at the same time, by this way it enhanced the
turbulent intensity. The heat transfer coefficient of the twisted
tube is *0% higher than the normal one, but the pressure drop is
almost the same.
Advantages of heat transfer with twisted tube
Fig. Stereogram of the twisted tube (Stainless steel) | Fig. Stereogram of the twisted tube (Carbon steel) | Fig. Stereogram of the twisted tube (Cooper) |
Seamless steel twisted tubes used for producing heat exchangers are complete ones without joints. Common materials used in steel tubes shows in bellow chart。
Fig. Twisted tubes produced by our company | Fig. Twisted tubes produced by our company | Fig. Twisted tubes
produced by our company |
国: | China |
モデル番号: | - |
离岸价格: | Get Latest Price |
ロケーション: | - |
最低注文量の価格: | - |
最低注文量: | - |
パッケージの詳細: | Wooden box |
納期: | face to face |
供給能力: | - |
支払いタイプ: | - |
製品グループ : | - |