Firefighting cart development

[mingki]

Hi, I am developing a cart which is able to enter into narrow mountain offroad.
The image of my cart is attached.
I want to install a firefighting mechanism on my cart.
I will put on a 200L water tank on my cart and a pump connecting them using 25A(1inch) pipe line.
My cart is battery driven. The capacity is 48VDC, 7A.
It is very difficult to find a suitable water pump that can be operated by DC battery.
Most of reliable industrial water pump especially designed for firefighting is AC driven.
Can you advise me how to amplify the water pressure using a typical DC water pump to shoot water to 70m distance at a flow rate of 100L/min?

 

[Artisi]

Have you really thought about 48vdc / 7 amps in relation to driving a pump delivering 100l/min.?

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[LittleInch]

Yup,

You need to re-think your numbers.

48V x 7A DC is 336W

100l/min at say a head of 80m is circa 2200W.

so that's one problem.

You are probably better scaling down your flow and jet to match your battery power or use an invertor to get ac power at a higher voltage.

You might be better off using some sort of gas bottle as your stored energy supply and a bladder inside a tank which you keep at a high pressure using a nitrogen bottle or even a scuba air tank and a suitable regualtor.

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

 

[MJCronin]

I may be old an cranky and off my meds ...... but this whole scheme doesn't sound right to me...

Is this part of a school homework problem ?


You are going to have only 200liters of water on the cart ? ..... This does not sound right ...... Why don't you tell us the truth ?

1) Is this cart going to be a fully loaded human powered cart that is to be moved to the tiny "fire" ????

2) Trying to quickly move the water to the fire by human power sounds wacky...... water is heavy and the battery is heavy.

3) If people are living in a mountain region they are living near the stream at the bottom of the mountains

4) Why cannot lightweight water tanks be located near the threatened tanks and human powered pumps be used ?

5) Small, cheap gasoline powered fire pumps make much more sense ..... Oh wait, the villagers will steal the pumps, won't they ?

6) Put cheap gasoline powered pumps with hoses on carts, have one cart with a fuel tank .... run them to the fire augmented with pre-positioned fire protection tanks filled by the stream in the middle of the village.

________________________________________________________________________________________________________________________________________________

On second thought ....

You know, if I were to design a quiet cart to go into the forest with 200 liters of liquid fertilizer to treat some kind illegal crop, it would look exactly like you describe ... Hmmmmmmmmmmmmmmmmmmmm

MJCronin
Sr. Process Engineer

 

[bimr]

Your cart would have to have NFPA approval.

It would be easier to buy an existing product:

Link

Link

 

[Artisi]

bimr, doubt that this would have any connection with NFPA.

Besides, it sounds like a pie-in-the-sky project anyway.
200 litre storage pumped at 100l /minute after battling narrow mountain roads really sounds like a winner.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)