Check Performance Of Air Conditioning System - Kubota KX080-3 Workshop Manual

Hide thumbs Also See for KX080-3:

Table of Contents

WSM KX080-3 Service

(5) Check performance of air conditioning system

1) Calculate the relative humidity from the psychrometric graph by comparing the wet- and dry-bulb

readings of the psychrometer at the air inlet.

HOW TO READ THE GRAPH:

After measuring the temperatures of wet- and

dry-bulb thermometers at the evaporator air

inlet, relative humidity (%) can be obtained.

Example: Supposing dry- and wet- bulb tem-

peratures at the evaporator air inlet are 25°C

(77°F) and 19.5°C (67°F) respectively. The

point of intersection of the dotted lines in the

graph is 60%.

Fig. Psychrometric Graph

2) Measure the dry-bulb temperature at the cool

air outlet, and calculate the difference

between the inlet dry-bulb and outlet dry-

bulb temperatures.

In this case ;

inlet dry-bulb = 25°C

outlet dry-bulb = 8°C

Then, temp. difference = 17°C

3) Check that the intersection of the relative

humidity and temperature difference is

above the line.

If the intersection is within a line A and a line

B, cooling performance is satisfactory.

Fig. Relative Humidity Graph

VI Air Conditioner

Show Quick Links

Table of Contents