Bookbot at NCSU Library – Efficient and Fascinating
Robotic book delivery systems, also known as bookBots, are a popular technology in new libraries – they help maximize usable space in the library and can efficiently store a tremendous number of books. In NC State University’s Hunt Library, the bookBot can store up to 2 million items and deliver them within 5 minutes of […]
Attention HVAC Engineers! DTC Has the Best Course for PE Exam Prep
WATCH OUR VIDEO! If you’re looking for your best chance to pass the HVAC & Refrigeration Mechanical PE Exam, Dr. Tom’s Classroom offers a comprehensive online prep course for the HVAC & Refrigeration PE Exam, specifically developed for the CBT format exam. Our HVAC course applies the successful Dr. Tom Method for CBT to the […]
Páternoster: The Continuously Moving Elevator
Instead of carrying things up inclines or stairs, a variety of methods have been invented to move people and things vertically – an interesting example is the páternoster. The páternoster is a continuously running elevator that was first developed in the late 19th century, and there are still a number of surviving examples like this one […]
Paper a Roof to Save Cooling Energy
Northeastern University researchers have developed a new “paper” that, when applied to roofs, can dramatically reduce cooling loads. The paper is made of hydroxyapatite materials spun into fibers and made into a paper. Its white color reflects the majority of the direct rays from the sun. In addition, heat from inside the structure is radiated […]
DTC Is Going To Be at AHR Expo 2023
The DTC Team is heading to Atlanta in February, and we hope to see you there at our AHR Expo Booth (BC1613). We’ll be giving away free courses, and offering a 20% show discount on all our courses. So drop by, meet Dr. Tom, learn firsthand what makes our Mechanical PE Exam Review courses so […]
Not a Cold Day on the Sand
The Finns have taken sand and turned it into an energy storage battery. Using insulated holding tanks that are 4 meters in diameter by 7 meters high filled with hundreds of tons of sand, the unit can store 8 MW-hours of heat, when the sand is heated to 500-600°C. The heat is used to keep […]
FEATURED TESTIMONIAL – I took the HVAC & Refrigeration exam and I PASSED!!!!
“I took the HVAC & Refrigeration exam and I PASSED!!!! Your step-by-step course really did make all the difference! This was my third attempt at taking this thing. The first time I took an in-person study course, a lot of theory, not great with the problem practice. The second time I tried to study on […]
Attention HVAC Engineers! DTC Has the Best Course for PE Exam Prep
WATCH OUR VIDEO! If you’re looking for your best chance to pass the HVAC & Refrigeration Mechanical PE Exam, Dr. Tom’s Classroom offers a comprehensive online prep course for the HVAC & Refrigeration PE Exam, specifically developed for the CBT format exam. Our HVAC course applies the successful Dr. Tom Method for CBT to the […]
Ice Cream or Dinner?
When I was growing up, there were two sounds I could not ignore, but I was always torn between which one to pursue. One was my parents calling me to dinner and the other was the sound of the ice cream truck. I had strict parents, so I had only one real choice. As could […]
Job Hunting Tips in the Great Resignation
With an unprecedented surge in the number of people quitting their jobs, the current employment environment is being called “The Great Resignation.” The Washington Post noted that this could be “the most worker-friendly climate in decades with workers having the ability to sort through near-record levels of job postings, and many employers hungry to hire.” In […]
