EcoRenovator - View Single Post - Evaporator sizing

Servicetech · 02-15-14, 12:33 PM

Sensible to latent heat ratio (humidity removal) closely follows the Saturated Suction Tempature of the evaporator coil. Larger coils and more airflow increase SST, trading better efficiency for less humidity removal. Smaller coils/lower airflow lowers SST, give up efficiency for better humidity removal. Go above 50 degrees and humidity removal will be minimal, go below 35 and you will freeze up the coil. Most systems are balanced well between 40f-45f SST. A TXV will keep superheat constant so most of the coil surface remains active. With a fixed orfice the amount of of the coil that is active wil vary depending on the load.

02-15-14, 12:33 PM	#30
Servicetech Apprentice EcoRenovator Join Date: Nov 2013 Location: Moore Oklahoma Posts: 267 Thanks: 108 Thanked 23 Times in 21 Posts	Sensible to latent heat ratio (humidity removal) closely follows the Saturated Suction Tempature of the evaporator coil. Larger coils and more airflow increase SST, trading better efficiency for less humidity removal. Smaller coils/lower airflow lowers SST, give up efficiency for better humidity removal. Go above 50 degrees and humidity removal will be minimal, go below 35 and you will freeze up the coil. Most systems are balanced well between 40f-45f SST. A TXV will keep superheat constant so most of the coil surface remains active. With a fixed orfice the amount of of the coil that is active wil vary depending on the load. Last edited by Servicetech; 02-15-14 at 12:38 PM..