Steam Pressure

I don't think there is going to be energy/fuel savings. On the contrary it may go up but certainly not much. Check the enthalpy difference between 6 bars and 8 bars, and you will find it not much.

But I will agree to the suggestion, it does not look good operating your boiler way below the design pressure. The quality of steam will suffer. I will not definitely put the range at 0-6 bars. Running it at 6-7.5 bars maybe a good range.

There are proven other boiler savings work that you can pursue like economizers, burner calibration, condensate return, trap maintenance, excellent water treatment, etc, etc.

The hotter the steam is as it leaves the boiler, the less of it will appear in the condensate return before it has had a chance to transfer that heat to the service user.

"Simples!ξ"

Bashir, I'm NOT surprised that someone would remark that they know best, I've seen a lot of that lately. I Doubt anyone can accurately determine your efficiencies without study of the actual demand..... Start with the Firing profile of this system ….. Neither pressure, nor temperature is the critical component in your COSTING structure. Fuel to energy... is what your paying the most for. My suggestion is study...Where is the optimum firing point, and can we stay at that speed/rate for as long as possible...... and achieve a balanced demand. .... supose you have one major user/ machine that is starting up ColdIron, can you have them come on line slowly, so the boiler doesn't have to go into Highfire. Ray

There are many ways to save energy while operating boilers. Few of them include regular maintenance as per the relevant standards, regular cleaning and maintenance of steam traps, regular checking of exhaust gas analysis suing gas analyser, operating the bolier at a pressure at optimum level based on the site experience combined with theoretical calculation etc.

GA..... Lucke Easy to understand. I hope the OP appreciates it.

This would only make real sense if you were in the process of designing and building the system, the savings would be in materials (tube, valve etc sizes) as higher pressures would require samller sizes of tube etc. If you look at a typical system you will see that the tube size on the lower pressure size is larger than on the higher pressure size.