Lippincott NursingCenter is a leader in providing clinical and professional peer-reviewed content to nurses and can help you meet your goals, whether youâre a new nurse starting out, or a seasoned nurse looking to stay up-to-date on the latest information.
Glass is far inferior to paper, plastic and Styrofoam in terms of insulation. Thermal conductivity in terms of BTU/(feet - hour - degrees F) is 1.82 for glass, 0.09 for paper, 0.06 for Styrofoam. The conductivity of plastics varies depending on the materials: for polypropylene and polycarbonate, the thermal conductivity values are 0.69 and 0.35, respectively.
Units for conductivity. Imperial â BTU*in/h ft ÂºF: In the Imperial system, conductivity is the number of British thermal units per hour (Btu/h) that flow through 1 square foot (ft 2) of material that is 1 in. thick when the temperature difference across that material is 1ÂºF (under conditions of steady heat flow).sed for standard building materials. In basic building materials, heat flow is usually measured by conductance (C) , not conductivity. Conductance is a material's conductivity per unit area for the object's thickness (in units of W/mÂ²K for metric and BTU/hrâ¢ft 2 â¢Â°F for Imperial).