46,000 litres per annum for 75kWe Generator???

[TimberCutterDartmoor]

Any diesel genny boffins on here know if that rings about right or not?

 

46,000 litres gasoil per annum for 75kWe air cooled Lister; not sure of load, but switched off between 11pm and 10am for 30kWe to run basics.

 

Seems high to me

[Al.]

Fag packet calculation:

 

A genny running at medium efficiency (which 30kw from a 75 kw genny will be) will be consuming somewhere in the region of 1 litre per 3 KwHr. 30kw will be 10 litres /hr. 13 hrs /night is 130litres. 365 days a year will be 47,500 a year. So yeah, that sounds about right.

 

Al.

[TimberCutterDartmoor]

Sorry meant to say that the 30kWe genny is a completely different genny; (perkins et al)...

[TimberCutterDartmoor]

This is my local pub on the moor; no mains. Needs to reduce bills!!! Suggestions!!!

[renewablejohn]

This is my local pub on the moor; no mains. Needs to reduce bills!!! Suggestions!!!

 

does he have a stream

[Al.]

The genny itself doesn't matter; the calc still holds. For 30 Kw of output for 13 hours a day its going to be in the region of 45,000 litres a year. This assumes that the genny is not running at its best (old, not fully loaded). A modern genny matched to a 30kw output should get down to about 30-35,000 litres a year. Gennys are a really expensive way of producing electric, but it does make the payback times for the likes of solar, wind etc much shorter. The downside though, if you're not grid connected, is that you need huge battery banks, and that makes it expensive again. Off-grid, anything that avoids energy state changes is what you're after; burning wood directly for heat is the obvious one, solar to directly heat water, but if you need electric regularly for a business, then a generator will feature somewhere in there. 30kw of solar will be somewhere in the region of 300 sq metres, in bright sunlight, and cost a big chunk. Unfortunately, I don't think there are any magic wand answers out there yet...

 

Al.

[TimberCutterDartmoor]

does he have a stream

 

funnily enough I think he does but don't think DNPA will even go there; no other renewables permitted; wood fired chp excepted - if it exists...

[gensetsteve]

Make sure heating, cooking and refrigeration are on bulk lpg tank. 75kw is alot of power even for a pub. Because people have to run a generator anyway they go mad for resistive heating and before you know it theres a power station in the garden.

[renewablejohn]

That's why I asked about a stream. Probably easiest renewable to get through the national park especially if you can make it a feature or attraction on the pub to draw tourists in.

[likeitorlumpit]

surprised you didn't suggest wood/chip burner:001_smile: