Refrigeration - 10° TD vs 15° TD in Walk in coolers

[@feArthEscArcrow]

This is great info!!!! Thanks for posting.

[@redneckways1617]

ALSO NOT to be confused with superheat…now we confused about 90% of the techs..👍🏻🤣

[@MariosACandRefrigeration]

great info thanks for sharing.

[@bobbytsiamis8553]

So as a service tech how do you know how the box was designed for when trying to fix it when it is broken?

[@mikerefrigeration5736]

If youre compressor puts out more BTU then your evap is rated for. Most walk in coolers are designed for a 10 degree TD. All this is a design idea to control RH. You cant change TD or force a certain TD on walk in cooler equipment. You can only design new equipment to operate at a TD that you want.

[@abazism]

I thought that it was the other way around. Where if I have more TD the the evaporator will be colder and the box temp will satisfy faster, and will run shorter period of time and will have more moisture. Kind of like oversized ac ?

[@LC-qi5ff]

How do you find the evap temp?

[@JP-sd2cw]

Hook up guages and look at your low side saturation temp for that refrigerant

[@JP-sd2cw]

Remember delta t is temp difference between the same medium but TD is temp difference between 2 diff mediums, in this case air entering the evap coil vs the saturation temp of the refrigerant inside the coil