A heat exchange apparatus to heat hydrocarbon liquid fuel that is particularly useful for a combustion system and method of operation that by fuel in a heat exchanger and avoids undesirable thermal fuel deposits that would otherwise reduce the effectiveness of the heat exchanger. The invention provides...http://www.google.es/patents/US5247792?utm_source=gb-gplus-sharePatente US5247792 - Reducing thermal deposits in propulsion systems
