Webinar—Rapid, in situ thermal conductivity measurements—Even in moist insulating materials скачать в хорошем качестве

Webinar—Rapid, in situ thermal conductivity measurements—Even in moist insulating materials

Discover METER sensors: https://www.metergroup.com/en/meter-e... Learn more: https://www.metergroup.com/en/meter-e... Dr. Gaylon Campbell shows how to measure the thermal conductivity of wet insulation with a 5-minute read time. These previously impossible measurements are now possible through advanced electronics and analytical methods. Steady state methods for measuring thermal conductivity in insulation are painstakingly slow. The temperature gradient inherent to the method also induces moisture movement within moist samples, making it unsuitable for such measurements. This seminar describes a new algorithm, used with a line heat source, to measure thermal conductivity of insulating materials in one minute, even in the presence of moisture. Join Dr. Gaylon Campbell as he discusses: The science behind the transient method, how to apply it, and how it performs on insulating materials How moisture affects the thermal conductivity of insulation Why only transient methods correctly measure the thermal conductivity of insulation when moisture is present How to determine the volumetric specific heat of insulation, to use as input to the measurement Presenter: Dr. Gaylon S. Campbell has been a research scientist and engineer at METER for over 25 years, following nearly 30 years on the faculty at Washington State University. Dr. Campbell’s first experience with environmental measurement came in the lab of Sterling Taylor at Utah State University making water potential measurements to understand plant water status. Subscribe to our podcast: https://metergroup.com/en/meter-envir... Follow us:   / meter_env     / meter-group   Questions? Our scientists have decades of experience helping researchers and growers measure the soil-plant-atmosphere continuum. Talk to an expert: Request a quote Disclaimer: The views and opinions expressed in the webinar and on this posting are those of the individual speakers or authors and do not necessarily reflect or represent the views and opinions held by METER. #metergroup #thermalconductivity #moistinsulation #thermal_properties_of_matter #soilscience Chapters: 00:00 Introduction 01:15 Start of presentation 02:00 Thermal properties 03:10 Measuring insulation thermal conductivity 04:06 Steady state heat flow Fourier's First Law 04:40 Line heat source methods for thermal properties 05:15 Pulsed infinite line source 06:22 Determining K 07:47 Moisture migration under a temperature gradient 09:50 Line heat source in insulation 11:00 Modeling the conduction process 12:12 Determining the thermal conductivity of insulation 13:32 Determining volumetric specific heat 14:29 Inserting the probe 15:25 Taking a reading 15:56 Entering volumetric specific heat 16:14 Simulation results 16:55 Insulation vapor isotherms 18:45 Response to a step change in humidity from dry to 90% 20:13 Conclusions