Air Treatment School Refrigerated Dryer Training Presenting. . . Air Treatment School Refrigerated Dryer Training

REFRIGERATION THEORY What is Refrigeration? Refrigeration is the process of moving heat energy from a location where it is not wanted to a location where it does not matter.

REFRIGERATION THEORY Heat Or “heat energy” is the amount or quantity of heat energy something contains. Measured in BTUs. A BTU (British Thermal Unit) is the amount of heat needed to change the temperature of one pound of water one degree Fahrenheit. Ton of Refrigeration = 12,000 BTU/H

REFRIGERATION THEORY Cold There is no such thing as cold There are only different amounts of heat We cannot “generate” cold, We can only “move” heat

REFRIGERATION THEORY Heat will only flow from a higher concentration to a lower concentration. Heat transfer is always from hot to cold

REFRIGERATION THEORY Types of Heat Sensible: When heat energy is transferred from one object to another causing a change in temperature. Latent: When heat energy is transferred from one object to another causing a change of state

REFRIGERATION THEORY

BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Evaporator Metering Device Compressor Condenser

BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Refrigerant Flow

BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Heat Flow

BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Low Side Suction Side High Side Discharge Side

BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Liquid Side Vapor Side

BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Superheat Subcooling

BASIC REFRIGERATION Superheat: Refers to a VAPOR heated above saturation Subcooling: Refers to a LIQUID cooled below saturation Saturation: When liquid and vapor refrigerant are in the same place at the same time. (100% RH)

BASIC REFRIGERATION

REFRIGERATED DRYER Basic Dryer Compressed air

REFRIGERATED DRYER Hot Gas Bypass Compressed air Hot Gas Bypass Valve Refrigerant Flow

REFRIGERATED DRYER De-Superheating Valve Compressed air Hot Gas Bypass Valve Refrigerant Flow

Hot Gas Bypass Valve With Solenoid REFRIGERATED DRYER Pump Down System Low Pressure Control Solenoid Valve Hot Gas Bypass Valve With Solenoid

REFRIGERATED DRYER Accumulator/Receiver

REFRIGERATED DRYER Refrigerated Dryer Temperature Testing 1 - Compressor inlet 2 - Compressor outlet 3 – Condenser outlet 4 –Filter/Dryer 5 –TXV 6 –De-Superheating Valve 7 – HGBV 8 – Bypass Tie-in 8 1 7 6 5 2 4 3

Refrigerated Dryer Temperature Testing 1 - Compressor inlet 2 - Compressor outlet 3 – Condenser outlet 4 –Filter/Dryer 5 –TXV 6 –De-Superheating Valve 7 – HGBV 8 – Bypass Tie-in 8 1 6 7 5 2 4 3

REFRIGERATED DRYER HPRP400