Thanks bacon4life!
As a simple man, I try to consider this in terms im familiar with, like hydraulics...
So the voltage increase is like increasing the pressure in a pipe, the wall thickness (insulation) needs to be thicker.
The flow or current remains the same so the diameter need not...
The best book I came across and used when I was a hydraulic engineer was:-
Power Hydraulics by Michael J Pinches and John G Ashby
Used it daily, much of the physical theory is unchanged. It may be hard to get hold of so good look.
Also Mannesman Rexroth used to offer a range of different texts.
Hi All
Question from a simple mechanical/hydraulic/Subsea engineer...
In a windfarm what are the pros/cons of switching from a 66Kv copper subsea cable to a 132Kv cable?
Does the cable physical CSA / diameter change or is it just an increase in power for the same properties? Obviously, all...
Thanks for your reply MikeHalloran, for contractual matters this form provide a mechanism for changes to be requested and agreed in an approved format.
1503-44, a very concise response, thanks, that is as i understood it! tks again.
All
Can someone offer some clarity please on the difference between MoC and RfC.
This is a constriction project with offshore operations, my understating is RfC would be used to make change requests to the Contract or Employers Requirements after contract award but before operations.
An MOC...
final text : -
Birdcage buckling Is a phenomenon which occurs in armoured subsea power cables and flexible’s when subject to low axial tension or twisting opposite to the direction of the cable lay up ie during manufacture, lay or loadout.
The axial torsion within the cable generated by both...
How does this sound folks?
Birdcage buckling Is a phenomenon which occurs in an armoured subsea power cable when laid or moved under low tension. The axial torsion within the cable generated by both the twisted cores and the steel wire armour produce a twist, this in turn causes a reduction in...
This is indeed an offshore lift in the North sea, I am proposing to our analysis dept some further consideration (as no one here can give me a definitive yes or no either) they may well defines a smaller DAF and impose limiting sea-states etc for the lift, I will update with there input.
tks...
Thanks Jeff, a very comprehensive reply indeed. I will definitely use this during my meeting!
Hi Civilman72, I’m hoping that their due diligence with regards to what Jeff mentions above has NOT been done properly/thoroughly and we at least have some recourse against someone.
Thanks again...
Esteemed colleagues
I’m about to start a dialogue with the local council as spokesperson for flood action group, a group of residents whom have repeatedly being flooded (one is my mother in law).
I’m a mechanical engineer in oil and gas so have no idea what I’m talking about when it comes to...
Thanks folks great replies, it's a small 6ft x 4ft lean to greenhouse for my daughter against a garage wall so half the found exists in the pathway around the garage, I'm adding 4 x paving slabs 60cm sq ea, I'm doing founds really as the adjacent soil is a boggy clay, probably over kill but I...
Found this
A basic mixture of mortar can be made using the volume proportions of 1 water : 2 cement : 3 sand. Most of the student activities can be conducted using this basic mixture. Another "old rule of thumb" for mixing concrete is 1 cement : 2 sand : 3 gravel by volume. Mix the dry...
Im a simple subsea engineer and have googled the above and got mixed info.
Can anyone please advise the ratio of water, postcrete and gravel (ive loads of gravel) for a simple foundation I’m preparing for a green house. I will dig a foundation pit 8 inches deep for 3 inches of hardcore (using...
folks
I appreciate the difference is minus the displaced volume of seawater but is there a rough ratio I can apply, ie if steel weighs 7850kg/m^3 and water is 1000kg/m^3 can I apply the ration (7850-1000)/7850=0.872 roughly providing no etrapted air?
Tks
