Date

Temp. of water from condenser (˚C)

Temp. of refrigerant in condenser (˚C)

Approach temp. difference (ATD) (˚C)

5-17-2011

31.0

36.6

5.6

10-17-2011

34.2

37.0

2.8

3-2-2012

32.0

32.9

0.9