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Found 3 results

  1. Here's a free video giving all the solution issues and references for #41 in the NCEES P.E. Practice Test for HVAC&R. Topic: COP, Brine Cooler, Ammonia Refrigerant. https://youtu.be/JXXMKW0jRzo More videos coming soon! ____________________________________________________________________________________________________________________________________________________ Get Practice with the 2020 Exam Standards and Question-Types, The Best and Most Up-to-Date PE HVAC&R Exam Prep Available, The Least Expensive Study Material of its Kind. Download our CBT Practice Exa
  2. Here's a free video giving all the solution issues and references for #70 in the NCEES P.E. Practice Test for HVAC&R. Topic: Compressor, Refrigeration Effect, Refrigerant Flow, P-h Diagram. More videos coming soon! ____________________________________________________________________________________________________________________________________________________ Get Practice with the 2020 Exam Standards and Question-Types, The Best and Most Up-to-Date PE HVAC&R Exam Prep Available, The Least Expensive Study Material of its Kind. Now get 50% off printed books w
  3. I am working the 6 minute solutions problem 67 and I was wondering how they derived the equation for power. I knew to use the isentropic equation with P=mdot*work. I canceled out the densities and almost ended up with their equation. Pth = (k/k-1)*Q1*p1*[(p2/p1)^k-1/k - 1] I don't really need help with the solution method, I just need to understand how they got k/(k-1) as part of the isentropic work equation. MERM 24.118 shows it as 1/(k-1). A previous post said to derive it, but I still wouldn't get k/(k-1) If someone needs I can post a photo tomorrow, but again I just ne
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