[OpenTRV-dev] My Export from Heating Company 1

[Bo Herrmannsen]

The water for the district heating does not have much scale in it, its not drinking water like you would have in a gas or oil heated home where you just connect the drink water to the heating loop to keep the system under pressure

is a closed loop... and they also have some green stuff in it so people can detect if the heat exchanger at each house is broken, not toxic but neon green so people know when to get it fixed


also reason for the less scale is that i reduces repairs on the distribution system... the pipes rot.... and i have seen my share of pipe dug up in the street... no scale build up, but they are a heck lot thinner than when they but them down


had it been in a house not connected to district heating it would been a total different matter.


and with my hotwater cylinder it will open and close once a day so think it will be manageable. let me thinker on the rads, i dont use the learn function yet as it will kick the unit out of warm mode and in to fost... maybe i'm doing it wrong, who knows?


anyway we have the summer to figure out things




Den 27/03/2014 kl. 20.31 skrev Damon Hart-Davis:

> We probably could tweak your code to have a max less than 100%, though I think that that *might* make the valve more prone to jam up with scale…
> 
> Rgds
> 
> Damon
> 
> 
> On 27 Mar 2014, at 19:28, Bo Herrmannsen <EMAIL ADDRESS HIDDEN> wrote:
> 
>> As you all know i use district heating where the goal is to cool the incoming water as much i can sending back cold water for the plant across town to heat up. 
>> 
>> They want to get rid of their heat :-D
>> 
>> So my bill is 2 parts, energy and cubic meters of water. The energy part is the cheap one, while the cubic meter is more expensive. Why that?
>> 
>> Because if you have a high flow you are likely to send back the water more hot than needed.
>> 
>> First graph shows last year compared to the 2 years before, i cant remember when i installed OpenTRV at the hot water but if not mistaken it was in march... and you will see a drop, not much but everything counts. It can be better if the code is adjusted to there is a max % open setting and you give it more time to heat the water, rigtht now 2 hours is enough with sometimes 10 mins to spare. Also keep in mind that its running on the picaxe version still. 
>> 
>> Oh, it will be 3 graphs, first one is how much i cool the water, so the higher the better, dark blue is 2013... green 2012, light blue 2011
>> 
>> 
>> 
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