Water Supply for logistic project

[Kashawy]

HEllo

In a logistic project consists of :

1- Labor Accommodation building. (Ground+2Floors)
2- Material Storage + Offices. (Ground+Mezzanine)
3- Car Maintenance Workshop + Offices. (Ground+Mezzanine)
4- Showroom. (Ground Floor)

As per local authority requirements, there should be roof tanks with Booster pumps for each building and one ground tank with Transfer pump.

Kindly I need help with the following :

1- How to control transfer pump operation in order to fill the roof tanks whether by means of Electrical float switch or Float valve or VFD. and what is the tank filling time/ pump cycle (with reference).

2- Should I size the Transfer pump (GPM) based on the total capacity of all Roof tanks and the filling time? or only based on the filling time of the roof tank which is controlled by Electrical Float switch ( in this case other tanks will be controlled by Float Valves).

3- Is there any particular requirements for Car maintenance workshop during calculation of water demand.


Thanks

 

[bimr]

For Items 1 & 2, one would need to know the capability of the water supply in order to answer the question.

For Item 3, one would need to know the building code requirements. For example, are sprinklers required? Other than sprinklers, auto shops don't consume large volumes of water.

 

[Kashawy]

Thanks for your reply Bimr

1- Roof tanks capacities are as following:
- Labor Accommodation : 9000 gallons
- Material Store+ Offices: 800 gallons
- Car maintenance garage + offices : 800 gallons (considered water demand for offices only as I don’t know for Car garage).
- Showroom : 400 gallons

2- No sprinklers required for this project.

 

[LittleInch]

Capacity is only one part of the equation.

You need to know daily and possibly hourly flow rates.

Also what is feeding the ground tank?

The most efficient system is for the transfer pump to run nearly continuously and have the other tanks accept the different flow rates you get from different facilities.

Some spare capacity is needed as for maybe 12 hours/day, usage is low and the other is high, but without knowing how much of a days supply 9000 gallons is you can't work out how to stop the tank running dry.

Float switch is usually better than float valves for this sort of operation.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[bimr]

If this is posted in the storage tank engineering forum, you would attract more responses.

 

[LittleInch]

This is the storage tank forum!

Did you mean the water storage and distribution forum?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.