Transient Hydrogen Heat Transfer
Abstract
The Chemical Engineering Science Division (Boulder CO) of the National Institute of Standards and Technology has investigated transient heat transfer to liquid hydrogen. Thin carbon films and Pt foils submerged in liquid hydrogen received stepped inputs of power of 1 to 42 W/ sq cm, and the onset of nucleate or film boiling was obtained for each power level. The critical heat flux was found to be approximately 8 W/sq cm, with the transition to film boiling occurring in times less than 10(exp-3). Premature film boiling can be related to the positive temperature coefficient of resistance and the narrowness of the heaters. Thermometric devices and power generation equipment selection are discussed.... Liquid hydrogen heat transfer, Nucleate boiling onset
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1990
- Accession Number
- ADA266615
Entities
People
- Beverly Louie
- W. G. Steward
Organizations
- National Institute of Standards and Technology