Help - power consumption

May 19, 2016 68 Replies

En el artículo , The Natural Philosopher escribió:

Save energy - live in a hamster ball!

BAXI 105E - Heap of junk. Bungalow, so high surface area exposed to elements, plus 1972 flat roof in part. I would pull the ceiling down in those areas and retrofit tight-fitting celotex, new PB and skim. Floors - solid or suspended ?. Suspended, well ventilated floors with 'modern' exposed wooden or laminate flooring is a money pit as far as thermal efiiciency is concerned. There is no subsitute for a good quality 80/20 fitted wool carpet for this situation.

It runs directly on mains pressure, so it doesn't matter where it goes, though the most appropriate place for a BAxi 105 is in a skip.

How much water do you waste before the shower or hot taps produce hot water ?. What is your water consumption ?.

I think you really need a proper stored hot water system. In a bungalow this would need a shower pump unless you went for a heat store.

Very well priced..

However can you find a leccy supplier so that the advantage of the Daligas service can then be less that a combined tariff CB postcode and around 90 a month on gas 110 on leccy. There are reasons for the latter

Suggestions?

All at what cost for what saving?

As we have since had fitted

and

So you've already said.

The shower is next to the boiler in the utility room so pdq.

The kitchen is more problematic especially as my wife prefers to do washing up under running water.

Still under investigation. Shower produces one bucketfull (~10 litres)/min.

At what cost for what benefit?

Just updating some bits:

The boiler certainly regulates ie it burns at a slower rate when necessary as well as having intermediate on/off periods.

For anyone who's interested the Parkinson Cowan clock dial is almost certainly simply measure 1cu ft/rotation and not as above. 10 rotations coincided with an increment in the Red number (10's of cu ft).

The shower runs the gas pretty continuously at a rate of about 1 cu ft /min. An 11'41" shower used 11.52 cu ft which I reckon to be 3.65kWh and on my tariff costing 13.6p, so roughly just over 1p/min.

Does this align with any of your estimates/expectations?

3.65kWh in 11'41" gives a power input of 18.75 kW (if I've got the maths right). 80% effciency gives 15 kW into the water 45 C shower, 15 C mains in and a flow rate of 7.5l/min requires 15.7 kW so ball park correct.

After being a factor of 10~100 out one way or another a confirming view from a different approach is reassuring though I need to check the flow rate in normal operation as I got nearer 10l/min (not heated).

Thank you.

I need to correct the above for my reference (and anyone else who is watching) and I've uploaded an explanation on

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The "clock"0 dial is 1 cu ft/revolution but as "ones" are not recorded it takes 10 revs to turn the number over ie 10 cu ft. And of course

100 revs to register 1 unit (100 cuft = 1hcf) as wanted by the energy supplier.

This does mean that the gas consumption whilst say taking a shower, or using the hob, can be quite accurately recorded, to around .02 cuft.

I believe that the .071 annotation refers to the vane inside which rotates once the flow starts and is of no relevance to the user.

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