Flowlinesarenormallyburiedintosoilbothtoimprovetheinsulationpropertiesandtoprovidemechanicalprotection.Thisgivesextracontributiontotheinsulationsothatthetotalheattransfercoefficientcanbeexpressedas:wherezistheburialdepthtothepipecentre. (共 236 字) [閱讀本文] >>