Cover Image
close this bookA Training Manual in Conducting a Workshop in the Design, Construction, Operation, Maintenance and Repair of Hydrams (Peace Corps, 1981, 216 p.)
close this folderSession 16: Use of multiple rams (1½ hours)
View the document(introduction...)
View the documentHandout 16A: Series hydram installation
View the documentHandout 16B: Waste water series hydram installation
View the documentHandout 16C: Parallel hydrams
View the documentHandout 16D: Sample problems

(introduction...)

Time 1½ hours

Objective:

By the end of this session trainees will describe how multiple rams, in series or parallel can be used in situations where h:H ratio, L:D ratio, or D make single ram unpractical or impossible.

Overview:

In small groups, trainees will solve problems to determine that single ram is impossible, and describe and size multiple system for meeting water need. Large group will discuss advantages/disadvantages of these systems, including cost efficiency.

Materials:

Handouts 16A, 16B, 16C, 16D


Problems 16A, 16B, 16C on flip chart


Flip charts, markers

Procedures:

Notes

1. Introduce session by reviewing limitations of hydram in terms of:

10 min.

- maximum h:H


- L: D ratios


- cost of galvanized pipe in large sizes


State objectives of session.


2. Form 3 small groups and assign each group one problem form Handout 16D. Distribute the relevant diagram (16A, B. or C) to the appropriate group.


The group task is to:

Allow 30 minutes for this.

- solve problem


- determine why single ram will not work


- study diagram and determine why the multiple ram arrangement will work


- size the multiple ram system


- plan 10 minute presentation to the large group


3. Representatives from each group present and answer questions.

30 min.

4. Ask large group to describe any additional advantages/disadvantages of multiple ram systems, any other situation they might be used in.

10 min.

5. Ask participants what application series/parallel rams have at their sites.