Condensor Flashcards
What does condenser do?
De superheat Vapor’s
Condense Vapor’s to liquid
Subcools liquid
Water cooled are more sufficient cause
Can operate at much lower condensing temps
Types of condesors
Double tubes
She’ll and coil
She’ll and tube
Tube in tube
Coil and cleanble
Water flows in the inner tube
Refrigerant in outer tube
In opposite to maximize transfer rate
Mineral Deposits
Heat from discharge gas causes minerals to come out of solution
Cannot be cleaned mechanically in tube in tube
Mineral deposits
Dirty condensers lead to high head pressures
Cleanble double tube
Have end flanges- remove to access circuit
Seal refrigerant
Shell and Coil
Closed in welded shell
She’ll acts as receiver storage tank
With cool coil refrigerant falls to bottom
Clean chemically
Shell and tube
Larger installations, clean mechanically
Compressor discharge
Wastewater systems
Economical is water is free or if system is small
The water can vary greatly
Refrigerant to Water Relationship
Pressure tap
Let in more or less water to constant head pressure
Varying with season
Faster inlet when water is warmer
Slower inlet when water is cooler
Recirculating Water system
85F
3 gpm is required to absorbe heat
10F split
Cooling Tower
Device passes outside air over water to remove system heat
Capacity limited by amount of evaporation
Forced draft
Remove low potential heat generated in production process
Natural draft
Often made of redwood fiber glass and galvanized
No blowers to move air through
Forced draft
Air is pushed through tower
Induced draft
Air is pulled though tower
Draft Tower
As water falls through the tower air is moved across it to aid cooling
Evaporative Condensors
Inside cooling tower
Makeup system replaces evaporated water
Evaporative condensors
Both air and water used to desuperheat condense and subcool refrigerant
Water allowed to escape regularily
Air cooled
Air absorbs heat in difficult places
Anywhere discharge
About 30F or higher
High efficiency
Allows systems operate at lower pressures
As low as 10F than outside ambience
condensing temperature drops
Ambient temp drops