Solar thermal systems
The first point to make is you have to stop using the term 'combi- systems' it is a term used to describe a type of boiler and has nothing in common with solar thermal systems. The continent may well use that term, but it will simply cause confusion in the UK.
It would appear that the UK has at last decided to allow engineers to get on with designing and fitting solar thermal space heating systems (well not quite yet, but soon) The time wasted while the carbon dioxide output rises is amazing.
I have a number of full systems in operation with excellent results all round-it isn't rocket science despite what some sections of the technical community say. My view is that solar thermal space heating has been suppressed in the UK so that someone can get some sort of control over it. For years I have read the absolute twaddle put to us by the so called experts, and wondered how my designs have worked so well.
It is a very simple concept:- design the heat emitter circuit, preferably floor heating, calculate the amount of storage required to provide a sensible step between supply and demand, then calculate the amount of panels to manage that. ALWAYS REMEMBERING THAT IF A PANEL SYSTEM IS STAGNATING IT IS A SURE SIGN OF INSUFFICIENT STORAGE.
Douglas Haigh Fellow institute donestic heating and environmental engineers. 22/11/2018
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