Heat Pipe Design and Technology: A Practical Approach by Bahman Zohuri

By Bahman Zohuri

With its exact skill to move warmth over huge distances with minimum loss, the warmth pipe has emerged as a confirmed environmentally pleasant, energy-saving answer for passive thermal keep watch over. notwithstanding, until eventually lately, the excessive price and complicated building use of those significant mechanisms has quite often constrained their use to house technology.

Written through a former senior leader scientist at Lockheed who has additionally labored for Westinghouse and the U.S Air strength, Heat Pipe layout and know-how: a pragmatic Approach presents a pragmatic research of contemporary warmth pipe engineering in nuclear and solar power purposes, discussing the way it could be optimized and made less expensive to be used on a much broader scale. An creation to operational and layout ideas, this ebook explores using warmth pipes, fairly in high-heat flux purposes and in occasions within which there's any mix of non-uniform warmth loading, restricted airflow over the warmth producing elements, and house or weight constraints. It additionally discusses layout and alertness of self-controlled, variable-conductance warmth pipes for thermal keep an eye on in spacecraft.

Offering a evaluation of warmth and mass move idea proper to functionality, the booklet covers concerns that may impact profitable warmth pipe operation, together with:

  • Balancing of warmth pipe quite a bit
  • Compatibility of materials
  • Operating temperature range
  • Power limitations
  • Thermal resistance
  • Operating orientation

With its presentation of mathematical types to calculate warmth move obstacles and temperature gradient of either excessive- and low-temperature warmth pipes, the booklet compares calculated effects with the to be had experimental facts from a number of resources to extend self assurance in present types. It additionally explains the place and the way readers can entry important interactive laptop codes and a chain of computing device courses constructed via the writer to help awarded info, relief layout, and are expecting performance.

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By Bahman Zohuri

With its exact skill to move warmth over huge distances with minimum loss, the warmth pipe has emerged as a confirmed environmentally pleasant, energy-saving answer for passive thermal keep watch over. notwithstanding, until eventually lately, the excessive price and complicated building use of those significant mechanisms has quite often constrained their use to house technology.

Written through a former senior leader scientist at Lockheed who has additionally labored for Westinghouse and the U.S Air strength, Heat Pipe layout and know-how: a pragmatic Approach presents a pragmatic research of contemporary warmth pipe engineering in nuclear and solar power purposes, discussing the way it could be optimized and made less expensive to be used on a much broader scale. An creation to operational and layout ideas, this ebook explores using warmth pipes, fairly in high-heat flux purposes and in occasions within which there's any mix of non-uniform warmth loading, restricted airflow over the warmth producing elements, and house or weight constraints. It additionally discusses layout and alertness of self-controlled, variable-conductance warmth pipes for thermal keep an eye on in spacecraft.

Offering a evaluation of warmth and mass move idea proper to functionality, the booklet covers concerns that may impact profitable warmth pipe operation, together with:

  • Balancing of warmth pipe quite a bit
  • Compatibility of materials
  • Operating temperature range
  • Power limitations
  • Thermal resistance
  • Operating orientation

With its presentation of mathematical types to calculate warmth move obstacles and temperature gradient of either excessive- and low-temperature warmth pipes, the booklet compares calculated effects with the to be had experimental facts from a number of resources to extend self assurance in present types. It additionally explains the place and the way readers can entry important interactive laptop codes and a chain of computing device courses constructed via the writer to help awarded info, relief layout, and are expecting performance.

Show description

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Extra info for Heat Pipe Design and Technology: A Practical Approach

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The cross heat pipes were designed to provide the necessary unpunctured radiating area at the mission end with a minimum initial system mass. Several design cases were developed in which the individual stringer survival probabilities were varied and the radiator system mass was calculated. Results are presented for system mass as a function of individual stringer survival probability for six candidate container materials, three candidate heat pipe fluids, two radiator operating temperatures, two meteoroid shield types, and two radiating surface cases.

An optimization technique is used in wick design to find the desired combination of ultimate heat transfer capacity, pumping capability, and temperature drop. The designer must also consider ease of wick fabrication, compatibility with the working fluid, wetting angle and permeability of the selected wick material. 26 depicts a cross-sectional view of an axial groove wick; this design probably is the most commonly used for space application. In addition, x-ray certification of all welds at the end caps and fill tube is required to ensure good weld penetration and the absence of voids.

Design and new generation of LMFBR reactor such as French built Phoenix are utilizing such heat pipes. 4. 5. In the case of rapid reduction of core temperature, additional radiation surface area in form fin are built on top of evaporation section of heat pipe or variable heat pipes are utilized, which are described in the later part of this section. This type of LHP has been utilized as part of the new NASA series of experiments for space-worthy value of heat pipe studies. LHP operation involves complex physical processes such as .

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