I would like for someone to research the standard hot water temperature for an Australian domestic hot water system and then tell me what length of pipe of standard diameter would be needed to heat mains water to that same temperature if an element was placed inside the pipe running the length of the pipe... I am looking at the feasability of an on-demand hot water system.
I am Mechanical Engineer. I have studied two subjects likes Thermodynamics and Heat Transfer related to your project. I do Heating, ventilation and Air conditioning(HVAC system) design of commercial and residential buildings for my clients.
Note..I will start work on your project after 12 days, because now I am working on another project.