Coal Mines to Serve as Energy Source – Without Burning Coal
Coal mines helped fuel the industrial revolution in the UK 200 years ago. Coal was plentiful, easy to access, and provided cheap energy to make England and Scotland an economic powerhouse. However, burning coal produces pollution in the form of soot, sulfur compounds that degrade air quality, and of course, carbon dioxide that can cause […]
Eiffel Tower Goes Green with New Refrigerant
Eiffel Tower goes Green with New Refrigerant As the world pays more attention to carbon dioxide and improves its energy efficiency, refrigeration engineers are looking at the harmful impacts their refrigerants create when released. Original refrigerants R-11 and R-12 were very efficient, but destroyed ozone. So, R-22 and later R-134a were developed to have low […]
DTC 2021 Mechanical Pass Rates – 87%
Watch the Video Our participants have reported in, and we are very proud to announce the 2021 pass rates for participants who completed DTC’s Mechanical PE Exam Reviews. DTC PASS RATES:Overall – 87%Machine Design and Materials – 90%Thermal and Fluid Systems – 84%.(NCEES Pass Rates for1st time: MDM 68%, TFS 69%, for repeat MDM 36%, […]
Energy Efficiency using 100% Outside Air?
Every HVAC engineer knows that air quality usually improves with the more outside air that is brought into a space. This is particularly true for hospitals and other spaces where indoor air contamination is an issue. However, using lots of outside air means also having to use more energy to condition the air. In many […]
Air Down Below
Some very good friends have a sailboat, and when I talked to them last weekend, they were working on the “brightwork.” Not knowing what “brightwork” actually was, I had to ask about it. They explained that it includes any exposed metal or varnished wood on a boat, anything that needs to be bright and shiny, […]
Attention HVAC Engineers!
WATCH OUR NEW VIDEO! Dr. Tom’s Classroom now offers an HVAC & Refrigeration PE Exam Review, specifically developed for the CBT format exam. It had long been a goal at DTC to add an HVAC course to our line up. After completing our new Machine Design & Materials and Thermal & Fluid Systems Reviews for […]
Around the World via Solar, Wind and Hydrogen
There are three technologies that are changing the designs of modern ships: solar, wind, and hydrogen. A fascinating CNET video describes a research vessel that is using all three technologies to achieve a fully self-sustaining travel. It is called the “Energy Observer.” Solar panels collect energy from the sun during the day and then it is […]
New DTC HVAC & Refrigeration Course Is Here!
We are very proud to announce that Dr. Tom’s Classroom now offers a brand new HVAC & Refrigeration PE Exam Review, specifically developed for the CBT format exam. It has long been a goal at DTC to add an HVAC course to our line up. After completing our new Machine Design & Materials and Thermal […]
The Big “After Graduation” Question – Is the Answer Still “Plastics?”
In the 1967 movie “The Graduate,” the character played by Dustin Hoffman has just graduated from college and his parents are throwing a big celebration party. The question he is asked many times by his parent’s friends is “What do you plan to do now that you have graduated?” One of his parents’ friends comes up to […]
New DTC HVAC & Refrigeration Course Coming Soon!
We are very proud to announce that Dr. Tom’s Classroom will soon be offering a new HVAC & Refrigeration PE Exam Review. It has long been a goal at DTC to add an HVAC course to our line up. After completing our new Machine Design & Materials and Thermal & Fluid Systems Reviews for the […]
