To determine the required length of vertical GHEs, one of the various parameters considered in the equation is the borehole thermal resistance (Bernier 2000), which is the ability of the GHE to resist heat transfer.
It resists heat (though not high heat), salt, nitrite and acidity.
Such a building is "basically designed to resist heat buildup for three hours," he said.
Decals for china and kitchen ranges are printed with mineral colours and are fired to resist heat.
PCB's, formerly used in oil because they resist heat, are now recognized as a likely human carcinogen.
Unfortunately, thermoplastics are more expensive, and they generally do not resist heat as well as thermosets; however, strides are being made in developing thermoplastics with higher melting temperatures.
But that does not produce a high enough total R-value, he said, referring to the measurement of a material's ability to resist heat flow.
He was interested in studying bacteria that resisted heat because he was studying the geysers at Yellowstone, and, it turns out, these bacteria have enzymes that can copy DNA.
They need to resist heat, vibration, rain, people slamming them around.
The synthetic chemicals, called polyfluorinated and perfluorinated substances (PFASs), have unusually strong fluorine-carbon bonds that can resist heat and help materials repel water, oil, and stains.
