Cover Image
close this book A training manual in conducting a workshop in the design, construction, operation, maintenance and repair of hydrams
close this folder Session 13: Inter-relationships within the hydram (11-15 hours)
close this folder Handout 13A: Exercises: Determining the effect of:
View the document Exercise 1: h:H ratio on efficiency
View the document Exercise 2: Frequency on the maximum delivery head to drive head ratio
View the document Exercise 3: Frequency on efficiency, quantity of water entering the hydram and quantity of water delivered
View the document Exercise 4: Volume of air in the accumulator on efficiency
View the document Exercise 5: Drive pipe length on efficiency
View the document Exercise 6: Drive pipe diameter on efficiency
View the document Exercise 7: The snifter on efficiency
View the document Exercise 8: Effect of the drive material on efficiency

Exercise 5: Drive pipe length on efficiency

TASK: DETERMINE THE EFFECT OF THE DRIVE PIPE LENGTH ON EFFICIENCY

Variables: efficiency (n) water wasted (Q ) water used (Q.) water delivered (q), time of the experiment

Controlled Variables: length of the drive pipe

Constants: frequency (f), drive head(H), delivery head (h) volume of air in the accumulator

Range: 10' - 80'

PROCEDURE:

1. Install a hydram to a drive head.

2. Accurately measure the drive head.

3. Attach and set an adjustable pressure relief valve and a pressure gauge to the discharge.

4. Start the hydram.

5. Open the snifter in order to fill the accumulator with air and then close the snifter for the duration of the experiment.

6. Calculate the impulse valve frequency

7. Simultaneously measure the time of the experiment, water delivered (q) and water wasted (Qw)

8. Calculate the efficiency (n).

9. Repeat the experiment making certain to keep the volume of air in the accumulator, drive head(H), delivery head (h) and frequency the same while changing the length of the drive pipe.

TASK: determine the effect of the drive pipe length on length on efficiency

Experiment #

                   

h:H ratio

                   

H

                   

h

                   

Qw

                   

q

                   

Q

                   

f

                   

s

                   

w

                   

t

                   

n

                   

Notes

                   


The effect of the drive pipe length of efficiency