Open Forum

Please feel free to start or join in the post discussions but be aware that anonymous posts and posts that are deemed totally unacceptable will be deleted and you may be banned from posting in the future.
Seadogs Forum
Start a New Topic 
Author
Comment
What’s the saying “get a life”



Things you do to amuse yourself on a cold wet afternoon.
The brine header tank for the a/c plant was about a third of the way up the funnel on the Himalaya. It had to be above the a/c unit for the Captains accommodation and I estimated that was about 120 ft above the a/c aft fridge flat. From memory I thought the Brine Head Gauge use to read about 60 psi.

Assuming calcium chloride brine at a density of 1200 kg/m3, gravity 9.81m/s and height in m and the SI formula below to calculate the pressure then:

P = ρ g h P = N/m2 ρ = 1200 kg/m3 g = 9.81 m/s

h = 120ft x 0.3048 = 36.576 m

P = 1200 x 9.81 x 36.576 = 430572.7 N/m2 ÷ 100000 = 4.31 bar x14.5 = 62.495 psi


The forward fridge flat had a brine head gauge reading of about 35 psi

35 ÷ 14.5 = 2.414 bar x 100000 = 241400 N/m2.. Rearranging the formula, then :

h = P/ ρ g

241400/ 1200 x 9.81 = 20.506 m /0.3048 = 67.277 ft above the fridge flat, but where? that I’m afraid escapes me after 56 years.

Roger Monk Ref Engr 58/61

Where are you from: Dartfrd Kent

Re: What’s the saying “get a life”

A very erudite explanation which could be summed up in the following phrase."The smoke goes up the chimney just the same!

Where are you from: originally Gosport now Campbelltown