Title:
CONSTRUCTION OF SINGLE-PHASE FLOW HEAT-TRANSFER PIPE
Document Type and Number:
Japanese Patent JPS6029593
Kind Code:
A
Abstract:
PURPOSE: To enhance a heat transfer accelerating effect, by providing the inside surface of a single-phase flow heat-transmitting pipe with spiral grooves.
CONSTITUTION: Ribs 5 are provided on the inside surface of the single-phase flow heat-transmitting pipe 1 at a set angle θ1 against the flow direction F, namely, the axial direction and at a pitch P, whereby primary grooves 2 with a depth e1 are provided. Secondary grooves 3' are cut in a spiral form in the ribs 5 in the manner of intersecting the ribs 5, at a set angle θ2 against the flow direction F and with a depth e2 from the upper surface of the ribs 5. Accordingly, the heat-transfer performance for a single-phase flow can be enhanced.
Inventors:
TAKAHASHI KENJI
OOGURO TAKAHIRO
NAKAYAMA HISASHI
YOSHIDA HIROMICHI
OOIZUMI KIYOSHI
OOGURO TAKAHIRO
NAKAYAMA HISASHI
YOSHIDA HIROMICHI
OOIZUMI KIYOSHI
Application Number:
JP13597683A
Publication Date:
February 14, 1985
Filing Date:
July 27, 1983
Export Citation:
Assignee:
HITACHI LTD
HITACHI CABLE
HITACHI CABLE
International Classes:
F28F1/40; F28F13/18; (IPC1-7): F28F1/40
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)