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

Описание: 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