Layered Composite Heaters for Semiconductor Processing

By | 2017-11-07T14:56:05+00:00 April 15th, 2016|Materials Science, Semiconductor, Thermal Management|

Figure 1: Composite layered heater from patent  US 9,224,626 B2 Alexander Glew, Ph.D., P.E. recently contributed to a new patent on an advanced thin-film electric heaters, layered composite heaters, for CVD semiconductor processing and related technologies titled “Composite substrate for layered heaters”.  Watlow Electric, based in St. Louis, hired Glew Engineering and Dr. Glew to help develop this heater technology due to his experience in the Silicon Valley’s semiconductor industry.  As a semiconductor equipment expert and materials engineering consultant, Dr. Glew’s familiarity with semiconductor manufacturing meant he understood both the limitations of common semiconductor chuck heating methods and the techniques that [...]

Window Energy Efficiency: Solar Heat Gain and Visible Transmittance

By | 2017-11-21T12:51:26+00:00 April 4th, 2016|Mechanical Engineering, Thermal Management|

Conduction and Radiation of Thermal Energy In my last blog post, I wrote about the conduction and radiation of thermal energy through windows and the thermal transmittance value, called the U-Factor, that characterizes that heat transfer.  The U-factor is useful in evaluating window performance and making wise decisions when specifying components for a building, but it is only one piece of the puzzle.  The National Fenestration Research Council (NFRC) mandates a second value alongside U-factor in its certification process, called the Solar Heat Gain Coefficient (SHGC).  SHGC represents the ability of a window to resist [...]

Window Energy Efficiency: Thermal Transmittance

By | 2017-11-07T15:14:36+00:00 March 30th, 2016|Mechanical Engineering, Thermal Management|

Figure 1: Windows catching sunlight By Magda S [FreeImages.com Content License] In our last blog post, I wrote about the thermal resistance (R-value) and transmittance (U-factor) of insulation and windows.  The R-value represents how well a material prevents heat transfer through its thickness, and U-factor is its inverse, representing how much heat a material will conduct through.  These values are fairly simple to calculate for most building materials materials like the bricks and panels in Figure 1, as they primarily experience only conductive heat transfer.  Windows are a more challenging proposition, however, since the heat transfer through them [...]

Energy Efficiency in Building Materials, Insulation and Windows

By | 2017-11-07T15:05:13+00:00 March 24th, 2016|Mechanical Engineering, Thermal Management|

Figure 1: FLIR image of two houses showing energy loss. Colors towards red on the scale indicate warmer surfaces and more energy loss. The basic principle behind thermal insulation is simple to understand.  The harder it is for heat to travel through a material, the better insulator that material will make.  In this blog, I’m going to take a look at how that effectiveness is quantified, after a brief review of the three methods of heat transfer.  The building and construction industry use a ratio called the R-factor to indicate how well a building material can insulate a space.  [...]

Thermal Expansion in a Glass and Aluminum Window: Part 2

By | 2017-08-12T16:31:30+00:00 March 17th, 2016|Finite Element Analysis, Materials Science, Mechanical Engineering, Thermal Management|

Figure 1: Simplified model of an aluminum-glass window   In last week’s blog, Thermal Expansion in a Glass and Aluminum Window: Part 1, we introduced the basic concept of thermal expansion in solid materials.  Since CTE mismatch can impose extremely high stress, during mechanical engineering design one must consider the temperature exposure and expansion or contraction of a material.  In order to help the read gain insight, we used a simplified aluminum-framed window to demonstrate that a hot summer day would be enough to shatter glass if the window wasn’t equipped with a flexible gasket between [...]

2014 IEEE CPMT Winner, Expert in Thermal Management and Heat Transfer

By | 2017-05-09T16:53:26+00:00 November 27th, 2013|Mechanical Engineering, Thermal Management|

Professor Avram Bar-Cohen, 2014 IEEE CPMT Field Award Winner, is leader in heat sink, heat transfer, and thermal management.

Eco Friendly Engineering Materials & Designs: Roofing

By | 2017-05-10T14:14:58+00:00 September 27th, 2013|Materials Science, Mechanical Engineering, Thermal Management|

Engineering designs and materials for roofing that work like a heat sink and help with the thermal management within a structure.

Engineering Environmentally Friendly Materials: Concrete

By | 2017-05-10T14:20:37+00:00 September 13th, 2013|Materials Science, Mechanical Engineering, Thermal Management|

We look at engineering materials to replace concrete while keeping the thermal properties and thermal management of the substance.

Thermal Properties and Benefits of Polyethylene (PEX) Piping

By | 2017-05-10T14:31:49+00:00 September 6th, 2013|Materials Science, Mechanical Engineering, Safety, Thermal Management|

A discussion on the thermal properties and engineering advances in the use of PEX pipe for thermal management in plumbing applications.

Thermal Analysis of Espresso Cup Materials (Part 1)

By | 2017-06-05T11:06:56+00:00 June 28th, 2013|Thermal Management|

Thermal Analysis of Espresso Cup Materials In our blog this week focuses on espresso coffee and the material of the cup in which it is served. The three standard materials that will be tested are paper, Styrofoam and ceramic. Paper cups are designed for cold drinks, so it is likely that they will result in the lowest amount of thermal energy retention in the espresso coffee. Styrofoam cups are designed as a cheaper and single-use alternative to standard ceramic coffee cups. Since they have the ability to handle a large range of temperatures, they will be able to manage [...]