Condensor

Question 1

De superheat

Answer 1

Sensible Cooling of discharge reaper

Contains superheat, motor heat, and heat

First 10 to 15% of condenser

Question 2

To condense

Answer 2

Removal of light and heat from the evaporator

Question 3

Subcool

Answer 3

Sensible cooling of liquid refrigerant occurs in the last 5 to 10% of condense

Question 4

Condenser split

Answer 4

The difference between condensing temperature minus air entering the condenser

Question 5

Condenser splits very

Answer 5

Standard refrigeration and AC is 10 SEER or 30°

Commercial 20 to 25

High-efficiency 15 to 20

Remote refrigeration 10 to 30

Question 6

Subcooling

Answer 6

Condensing temperature minus liquid line temperature

Question 7

Subcooling prevents…

Answer 7

Flash, gas, and liquid line

1° of sub Cooling equals half percent increase system system efficiency

Question 8

Condensed liquid can flash into vapour from

Answer 8

Pressure drop and added heat

Question 9

Adding refrigerant…

Answer 9

Raises sub, Cooling

Question 10

Low ambient

Answer 10

Air entering the condenser below 60

Question 11

Low head pressure causes metering problems

Answer 11

The TEV would starve the evaporator

90° or below is low pressure

Question 12

Two methods to control head pressure

Answer 12

Fan cycle control, and condenser flooding

Question 13

Fan cycle

Answer 13

Wood head pressure falls the fan shuts off

When head pressure rises, the fan starts

Question 14

Condenser flooding

Answer 14

Same as overcharging the unit

Question 15

HP stands for head pressure regulating valve

Answer 15

It restricts liquid flow out of condenser back up, refrigerant in the condenser raises, head pressure and bypasses, hot gas to warm, cool liquid 

Question 16

Cleaning condensers

Answer 16

Use a non-acid coil cleaner and use pump, sprayer pressure washer, steam or hot water hose

Question 17

Indoor condensers

Answer 17

Clean condenser first and clip as hooks onto the condenser face mount of fibreglass air filter on the S hooks

Question 18

Ice machines

Answer 18

Most have factory installed condenser filters

Question 19

Microchannel condenser coil

Answer 19

Flat plates or channels, replace around tubing and new designs, increase condenser efficiency and condenser size is reduced

Question 20

Tube tube water cooled condensers

Answer 20

Refrigerant flows in the outer tube

Question 21

Flanged type

Answer 21

Two straight tubes one inside the other and flanges are moveable for cleaning

Question 22

Coil type

Answer 22

Two coil tubes, one inside the other 

Question 23

Regulating valve helps

Answer 23

Coldwater comes in and lowers head pressure condensing temperature so the regulating valves help maintain consistent of these 

Question 24

If mineral buildup is more than 10°

Answer 24

You can adjust the water regulating valve with a service valve inch to adjust flow 

Question 25

Where do minerals start to form?

Answer 25

We’re hot. Gas enters in the warm condenser water leaves.

Question 26

Shell and tube water cooled condensers

Question 27

Wastewatersystems

Answer 27

City water washed down drain Use 1.5 gpm at 75 degrees

Question 28

Recirculated systems (cooling towers)

Answer 28

Circulate 3gpm ton at 85 degrees

Question 29

Fan at air outlet

Answer 29

Pulls air through tower Cools water rejects heat

Question 30

Fan pushes air

Answer 30

Through cooler

Question 31

Evaporating water cools condenser

Answer 31

Which is inside the tower

Question 32

Cooling towers are heat rejecters

Answer 32

They do not condense refrigerant and are not considered condensors

Question 33

Water cooled condenser is part of

Answer 33

Water cooled chiller

Question 34

Entering Wet Bulb Temp

Answer 34

Lowest temp that water can theoretically reach evaporation Most important parameter in tower selection

Question 35

Approach

Answer 35

Is difference between water leaving and entering wet bulb

Question 36

7F is common

Answer 36

78 and 85 from approach

Question 37

Range

Answer 37

Difference is difference temp in water leaving and entering of tower (9.4-10

Question 38

Total Heat Rejection

Answer 38

Amount of sheet to be removed from the circulating water within the tower It is equal to the refrigeration effect plus the work of compression 115-2118

Question 39

Drifted or winded

Answer 39

Drift is air that gets in trained in the airflow and discharge to the atmosphere Very small and very widely does not include water by evaporation Proximately 0.00 0.00

Question 40

Evaporation

Answer 40

For each pound of water cooling power evaporates it removes about 1050 BTU from the water that remains Approximately one percent of tower GPM

Question 41

Blow down or bleed off

Answer 41

Water contains impurities when it is evaporated. These impurities are left behind. Bleed test is determined by specialist who are trained

Question 42

Make up is amount of water

Answer 42

Required to replace normal losses caused by drift evaporation blowdown

Question 43

Types of cooling towers

Answer 43

Natural draft, which is atmospheric and mechanical draft which has a induced drive-through and forced blow through