Unlock instant, AI-driven research and patent intelligence for your innovation.

Heat Transfer Tube

a technology of heat transfer tube and heat transfer fin, which is applied in the direction of heat exhanger fin, tubular element, refrigerating machine, etc., can solve the problems of nuclear site and deactivation

Pending Publication Date: 2022-05-12
CARRIER CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a finned tube design with helical fins that improve heat transfer and reduce pressure drop. The fins are attached to the exterior of the tube and are arranged in a continuous pattern. The fins have channels between them that enhance the heat transfer. The fins are symmetrical and have a cross-sectional shape that is similar to a wing. The ratio of the fin height to the outer diameter of the tube is important and affects the efficiency of the tube. The design can be used in various applications such as heat exchangers and cooling systems.

Problems solved by technology

An excessive influx of the surrounding liquid can flood a re-entrant type nucleation site and deactivate it.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat Transfer Tube
  • Heat Transfer Tube
  • Heat Transfer Tube

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0041]FIG. 2 illustrates a magnified cross-sectional side view of a portion of a finned tube 100. As shown, the finned tube 100 includes a plurality of adjacent helical fins 120 (e.g., separated by a channel 130 with at least one channel enhancement 131 impressed radially into and transversely through at intervals around the exterior surface 111 of the tube body 110). It should be appreciated that although the channel enhancement 131 is depicted as a cross, any suitable configuration (e.g., such as a rectangle, square, triangle, star, etc.) may be utilized. In this embodiment, the finned tube 100 may further include a top enhancement 124 impressed radially into and transversely through (e.g., with the notching disk 66) at intervals around the circumference of the exterior surface 111 of the tube body 110. It is envisioned that each respective enhancement 131, 124 regardless of specific configuration or where located (e.g., in the channel 130 or in the fin top 121), may have a certai...

fifth embodiment

[0045]FIG. 6 illustrates a magnified cross-sectional side view of a portion of a finned tube 100. As shown, similar to the previous embodiments (shown in FIGS. 2-4), this embodiment of the finned tube 100 includes a plurality of adjacent helical fins 120 (e.g., separated by a channel 130 with at least one channel enhancement 131 impressed radially into and transversely through at intervals around the exterior surface 111 of the tube body 110). Unlike the prior embodiments, in this embodiment, the helical fins 120 are not symmetrical (e.g., along the vertical plane), the sidewalls 122 include protruding wings 140, and the fin tops 121 do not include enhancements. In particular, the lack of symmetry may be created by the configuration of the sidewall enhancements 123 shown in FIG. 6, which may be viewed as non-uniformly distributed in the cross-section of the fin 120. This non-uniform distribution of the sidewall enhancement 123 may be created during manufacture. For example, as the t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A finned tube (e.g., for use in a flooded and falling film evaporator) is provided. The finned tube includes a tube body with an interior surface and an exterior surface. The finned tube may include a plurality of adjacent helical fins (e.g., continuously or intermittently) protruding circumferentially around the exterior surface of the tube body. At least one channel is disposed between the plurality of adjacent helical fins. Each respective helical fin includes at least one sidewall and a fin top. Each channel includes at least one channel enhancement impressed radially into and transversely through at intervals around the circumference of the exterior surface of the tube body. The finned tube may also include at least one top enhancement and / or sidewall enhancement impressed radially into and transversely through at intervals around the circumference of the exterior surface of the tube body.

Description

CROSS REFERENCE TO A RELATED APPLICATION[0001]The application claims the benefit of U.S. Provisional Application No. 63 / 198,724 filed Nov. 9, 2020, the contents of which are hereby incorporated in their entirety.BACKGROUND[0002]The invention relates generally to heat transfer tubes in flooded heat exchangers where nucleate boiling (e.g., on the external surface of the heat transfer tubes) is the dominant mode of heat transfer. In particular, the invention relates to the external surface configuration of a heat transfer tube that is used for evaporating a liquid in which the tube in submerged (e.g., either completely or partially).[0003]Shell and tube type evaporators are used to transfer heat from one fluid to other in many air conditioning and refrigeration systems. A shell and tube evaporator is a heat exchanger in which multiple tubes are arranged in some patterns within a single shell. In refrigeration systems, typically a coolant is passed through the multiple parallel tubes ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): F28F1/42F28F1/36
CPCF28F1/426F28F1/36F28F1/26F25B39/02B21D53/022F28F2255/16F28F1/422F28F2001/428F28F13/187F28F2215/10
Inventor MOHANTA, LOKANATHZHANG, WEI
Owner CARRIER CORP