Calculation problem of heat transfer coefficient of boiling surface in tube, what is the coefficient a in the formula
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The refrigerant is R134a, and the evaporation temperature is t0=2℃. According to the book, if the heat flux density qi>4000, the heat transfer coefficient = (57.8?a?qi0.6?gm0.2)/di0.2. So what is the a coefficient of R134a? What table to look for?
Don't you think you are lazy? Since you can’t type out the formula clearly, you should arrange it in Word and then make it into a picture and post it. What is your attitude?
Sorry, this is my first time posting. I don’t understand. I entered it using a mobile app. I didn’t know it would look like this. I re-enter
Go directly to the book content. Want to find the coefficient a of R134a
Can't post the photo, please try again
This post was last edited by wiseboy on 2017-12-6 08:55. We all use software to calculate. Just select 134a, and all other software will calculate it.