Can anyone tell me what kind of power back ups they use for fiber optic networking equipment in ISP networks and across the world. Do they tend to all use UPS from batteries or do they have generators for in the events of major long term power outages?
Yeah you are right I'm wrong , for the case of the appliance to become live there would have to be both a bad Earth and Neutral and it wouldn't blow any fuse.
Where I live we have a multiple Earth neutral electricity system. With that if you short the neutral to Earth some of the current will return to the Neutral through the Earth ( through the Earth wire attached to the appliance and then through the link between the neutral and Earth bus bars in...
Normally evaporators have some kind of fins (maybe just a plate that evaporator tubes are pressed into) as the resistance on the air side is much greater than that of the refrigerant to heat exchanger side.
PS in cheap commercial units we use a capillary tube instead of a expansion valve but of course it does not adjust itself for differing conditions to maintain a constant superheat at the outlet of the evaporator but is designed for design temps/pressures and conditions. If a thermostat fails and...
IN refrigeration evapourators the refrigerant goes through a valve called the thermostatic expansion valve which measures the amount of liquid into insure all liquid is boiled by the end of the evapourator then it goes through a distributor which is basically a orifice which then divides into...
A airconditioning heat load program would be great otherwise you have to get charts for your Latitude showing the radiation intensities on a south wall, Note the amount of window in direct sunlight is affected by the overhang of the roof (which you would have to calculate, yes for each hour) The...
there is a concern it that if there is a bad connection (Break) in the Neutral somewhere the Neutral would become live creating a short circuit (hopefully blowing the fuse )
The mass rate out is the same as the combined mass flows in of the fuel and air. You know the the density of the air you can work out the volume of air which from the ratio you can work out the volume of fuel. You know the density of the fuel so you can work out the mass flow of the fuel.
I hope your tank has a pressure relief valve so if it gets too hot and boils it does not explode and kill you. And that the tanks are hydraulically tested to withstand a pressure above that of the pressure relief valve in accordance with the laws of where you are.
otherwise some one is going to have to spend some money bigger heat exchangers or another one in series in the air flow, a higher pressure boiler or perhaps one could add electric elements or heat some other way.
Reducing the Air flow will increase the Air temp but the heat output of the heat exchanger will drop badly.Ie must less air coming off at a higher temp. less total heating value of said air as there is less of it. Make sure there is no air trapped in the heat exchanger (steam side) Don't burn...