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

2. 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.

3. 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

4. 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

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

6. 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

7. REFRIGERATION THEORY

8. BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Evaporator
Metering Device
Compressor
Condenser

9. BASIC REFRIGERATION Vapor Compression Refrigeration Cycle
Refrigerant Flow

10. BASIC REFRIGERATION
Vapor Compression Refrigeration Cycle
Heat Flow

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

12. BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Liquid Side
Vapor Side

13. BASIC REFRIGERATION Vapor Compression Refrigeration Cycle Superheat
Subcooling

14. 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)

15. BASIC REFRIGERATION

16. REFRIGERATED DRYER
Basic Dryer
Compressed air

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

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

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

20. REFRIGERATED DRYER
Accumulator/Receiver

21. 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

22. 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

23. REFRIGERATED DRYER
HPRP400