Hybrid Power Generators

[renewablejohn]

It's basically just a ups. These can be picked up for peanuts second hand as after 3 years they have very little value. I have a two year old 25 kva single phase in stock for £1500. A 40 kva 3 phase 2 years old £2500 no batteries but you don't want second hand batteries any way. Have large battery cabinets if needed.

 

Could be interested in the 3 phase could you pm me more details

[openspaceman]

Come on this technology is ancient my canal boat was built in 1998 and uses it well before any green initiatives.

 

Typical system would add approx 3k to generator cost so why would you not use it.

 

http://www.victronenergy.com/upload/documents/Datasheet-Quattro-3kVA-10kVA-EN.pdf

 

The BBC producer next to where I started work had one powered by a lister startomatic in 1974. It was built by one of the electrical engineers from the national grid research place, as was just up the road in Leatherhead.

 

Great fun playing in his workshop trying to make things on his myford, he passed away last year.

[gensetsteve]

Could be interested in the 3 phase could you pm me more details

 

I will get the details tomorrow took the units out about 18 months ago including all the change over and bypass panels. The whole lot cost 60 k when new. Have the quotes drawings and manuals.

[briquette_seller]

Iam interested in the single phase unit, possibly a new battery box unit, to run security lights and cctv overnight.

[gensetsteve]

Iam interested in the single phase unit, possibly a new battery box unit, to run security lights and cctv overnight.

 

I had a look today the single phase is a riello 12 kva msm sentry model not 25 as I thought earlier.

[wills-mill]

Tidy system, but presumably all the stop/start activity will kill off the engine a lot faster than if it burbled away at a steady temperature and load?

[cornish wood burner]

Tidy system, but presumably all the stop/start activity will kill off the engine a lot faster than if it burbled away at a steady temperature and load?

 

Unfortunately loads are rarely constant, if they were then there would be little need of this system. The idea is to even out the peaks and troughs and also supply power to very low demand times. Say a factory wanted 200 kVa for 1 hour, 100kva for 9hours and 1 kVa to run security over night. This type of system would do that but a straight genni would need to be bigger than 200kva which would be very inefficient producing 1 kva

Edited November 21, 2015 by cornish wood burner

[cornish wood burner]

Unfortunately loads are rarely constant, if they were then there would be little need of this system. The idea is to even out the peaks and troughs and also supply power to very low demand times. Say a factory wanted 200 kVa for 1 hour, 100kva for 9hours and 1 kVa to run security over night. This type of system would do that but a straight genni would need to be bigger than 200kva which would be very inefficient producing 1 kva

 

Forgot to add that in my example engine hours would also be reduced by 50% as it wouldn't need to run overnight

[gensetsteve]

Forgot to add that in my example engine hours would also be reduced by 50% as it wouldn't need to run overnight

 

Buy the right size generator and save the 25 k by not having the hybrid. Run the security from a small diesel lister or an off grid system that charges during the day.

[openspaceman]

Buy the right size generator and save the 25 k by not having the hybrid. Run the security from a small diesel lister or an off grid system that charges during the day.

 

It's an interesting problem: look at the way temporary traffic lights are now LEDs and battery powered whereas in the past they were a small diesel genset and incandescent lights. Household demand for electricity for IT equipment has also gone down with flat screen tv/monitors, fluorescent (spit) and led lighting.

 

With a 4kVA inverter costing around £500 and allegedly about 90% conversion efficiency I'd be thinking in terms of some asynchronous generators into a 300V DC bus with a relatively small battery for peak lopping and low demand maintenance.

 

After my early experience with a Lister startomatic and inverter I got involved with a small remote classroom that catered for about 5000 pupil visits per year, mostly outside work but start and end in the classroom where there were 2 permanent staff and a plethora of volunteers. Power was from a 5kVA air cooled Lister twin which had racked up 40000 hours.

 

After much debate and threats from the professional staff it was decided to go for a grid connection, some £50k to be raised by an appeal. No luck with that so we fitted a new watercooled 10kVA set and watercooled manifold to run as CHP in the winter. The big jump in power was because staff insisted on being able to run a kettle without browning out the IT system (server and 3 PCs?

 

The heat delivery was moderately successful but the conversion efficiency fuel:electricity went down to under 20%. In fact the cost of fuel alone per kWh was the same as we would have had to pay for grid electricty (about 7p in those days there are just over 10kWh of heat energy in a litre of diesel).

 

What we should have done was insist the water boiling was by propane and used a UPS to condition the supply to the IT system.

 

I left when it was decided to redevelop the woodland with a large more permanent facility to cater for more visits and justify the capital cost of a grid connection.

 

The irony is that they had previously turned down the request for a concrete pad and cell mast which would have provided a free interconnect and £4k/annum licence fee because it would damage the ancient woodland site.