Hi Admin!
In your earlier posts you've said that the 800kWh are PRODUCED by the system.
I quote your post from the 15th of January:
“As I mentioned in my post above this 800kwh figure is of usable energy – i.e. it is the heat delivered to the cylinder and used. Our test system is actually our hot water system for our office here which we use for hand washing, dishes etc.. with no other heat source being used to put heat into the cylinder. If conventional heat sources (e.g. electricty, gas or oil) were used to produce the same amount of usable hot water over the past 8 months then we would have had to produce 800 kwh of heat energy using those means.”
as well you're posting at the 14th of January:
“Our test system here of 30 tubes has produced 800kwh in 10 months and we expect it to hit about 1000kwh for the year – this is the actual usable energy delivered to the cylinder as opposed to the energy produced by the collectors.”
These two posts of yours CLEARLY state that the figure of 800kWh is NOT derived at the point of consumption, namely the water tap.
Please state clearly if the meassuring device was mounted at the tap or not. Try to understand that useable energy stored in the tank is not the same as used energy at the tap. (A coal mine holds so and so much useable energy. But that is far more than what is actually used at the coal power plant. Which in turn is only a fraction of what is used behind the electric meter, what is actually used by the consumer)
On the 15th of January you speak about ” no other heat source being used to put heat into the cylinder” and on the 14th of January you speak about “energy delivered to the cylinder” …..
Which means CLEARLY that the energy which was used at the tap was NOT meassured at all.
In fact the meassured 800kWh where not the USED energy. Only the PRODUCED energy. According to your statements.
A heating system is complex. Losses occuring due to storage losses for example are not presented in the USED energy number. A common trick to talk-up efficiency of a system, usually done by boiler sales men and heatpump cowboys.
Neither the stated efficiency of a condensing boiler nor the COP of a heatpump presents the efficiency of a heating system. Only what is actually needed/tapped counts, has to be compared with the energetic or financial investment. To stay serious when talking about energy efficiency…..
Something many people can't keep seperate. Similar to the difference between the energy produced by the car engine and the energy consumed by the car engine….how much energy it actually needs to get 1 person from A to B is a miracle for most drivers.
About the waste of energy:
Solar energy is not wasted. It shines anyhow.
It is the electric energy which is wasted running circulation pumps when using so called ” heat dumps”.
It is the energy wasted for maintenance of the ST system if this needs regular checking/replacing of the anti-freeze.
It is the energy wasted to build and install heat dumps.
It is the energy which is wasted installing a ST system that does not perform when energy is most needed – in Winter.
It is the energy wasted by prematurely aging of a ST system by putting it under stress like heat and pressure.
The standard meassurement when saving energy in an office is to de-install the hot water system. A common method used around the globe, also in Ireland. Simple and efficient.
There is absolutly no need to have hot water in an office. The Japanese gouvernment has now de-installed all hot water systems in their offices. So are doing all the major offices of banks and insurances.
The boilers are simply switched-off.
Replacing waste with waste produces nothing else but more waste.
The sun casts many times more energy onto our planet than mankind uses. No one would come up and say it is wasted. Wasted is the fossile energy to produce inefficient equipment people claim they have to have. To harvest solar energy for example.
Getting more with less to cover a meagre demand is a way out of this rat race.
The energy balance sheet to wash hands and dishes under avarage home or office situations with hot water is negative. A waste of resources.
Again my question:
Why was the energy meassurement device not placed at the tap?
In your last post you've clearly stated again – I quote from it
“…You expressed yourself very clearly and we are talking about the same thing. The 800Kwh figure is the energy that was used or consumed by us in Ecologics to heat our water over the last 8 months. “
My words seem to have been not clear enough, excuse my bad command of the English language (smiley): There is a difference between used energy/consumed energy to warm up the water ( as you call it yourself ) and the usefull energy actually tapped.
So please again: why was the energy meassuring device not placed at the tap?
Thanks!
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