DEVELOPMENT OF A HIGH TEMPERATURE HEAT PIPE HEAT EXCHANGER
Research has been carried out on sulphur - iodine mixtures for potential use as a new heat pipe fluid for the economically attractive temperature range between about 300 degrees C and 500 degrees C. Small percentages of iodine were added to sulphur to reduce its anomalous liquid viscosity to acceptable levels. Heat transfer tests were conducted on silica and metal heat pipes, which indicated stable operation over a range of conditions up to a maximum axial power density tested of about 1 MW m**-2 at 400 degrees C vapour temperature. Theoretical estimates, backed by experimental observation, indicate the high concentration of iodine in the vapour phase. However, the observation that silica heat pipes were not corroded by sulphur - iodine led to a successful demonstration that silica coating can protect the normally corrodable underlying metal. There appear to be valuable savings possible for energy recovery from waste gas streams in the temperature range 200-500 degrees C. Thus, there is good incentive to carry out future studies on this new low pressure system which should concentrate initially on a solution to the material compatibility problem.
Bibliographic Reference: EUR 9932 EN (1985) MF, 108 P., BFR 300, BLOW-UP COPY BFR 540, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124064500 / Last updated on: 1987-01-01
Available languages: en