Search found 15 matches

by MorHydro
Fri Sep 15, 2017 7:29 pm
Forum: Hydropower News
Topic: Business Rates
Replies: 3
Views: 2253

Re: Business Rates

Henry, Can you provide more details? Either on the forum or if you prefer privately to the BHA. As you may know there seems to be an end in sight for most hydro schemes in Scotland although there is still much to work out. However that is not the same in England and Wales so any progress by members ...
by MorHydro
Wed Aug 02, 2017 6:55 pm
Forum: Medium Head Hydro
Topic: Looking for a site
Replies: 0
Views: 780

Looking for a site

We have a nice 1959 Gilkes No 18 single Jet Pelton. Never been used with a subsidy so with re-refurbishment would make a good small hydro project of around 20kW to 30kW. I am looking to purchase a lease for a site with around 80m to 100m head at 35l/s flow. Either consented or not consented. In Scot...
by MorHydro
Sun Jun 11, 2017 2:12 pm
Forum: Medium Head Hydro
Topic: EA/NRW compensation flow and OFGEM Interpretation
Replies: 1
Views: 1123

Re: EA/NRW compensation flow and OFGEM Interpretation

Surely the problem is not the turbine size but the blocking of the compensation arrangements. That happens on many sites and frequent inspection and screen cleaning may be required. It is really about the dimensions of the screen that protects the compensation flow.
by MorHydro
Thu May 18, 2017 4:26 pm
Forum: Hydropower News
Topic: Getting more members on the BHA forum
Replies: 1
Views: 1250

Getting more members on the BHA forum

The forum is very underused - I am guilty of not logging in often as well but I wonder if we could have an effort to encourage more members to join?
by MorHydro
Thu May 18, 2017 4:24 pm
Forum: Low Head Hydro
Topic: Insurance Premiums
Replies: 3
Views: 1750

Re: Insurance Premiums

Premiums have been creeping up. 2015 was a bad year for low head hydro with all the floods. Although as you say most of the brokers end up back at the same underwriters. We use Naturesave Insurance Brokers who have done a good job for us so far. Might be worth a try.
by MorHydro
Thu May 18, 2017 4:22 pm
Forum: High Head Hydro
Topic: Coanda screen blocking
Replies: 5
Views: 4079

Re: Coanda screen blocking

Henry We did find the problem.....turned out not to be the chemical analysis of the water but effectively an airlock forming under the screen. We were misled by the evidence because at commissioning there was no problem and the intake worked properly. The odd behaviour just happened to coincide with...
by MorHydro
Tue Feb 07, 2017 10:46 am
Forum: Hydropower News
Topic: Business Rates
Replies: 3
Views: 2253

Business Rates

As I am sure most of the BHA members are aware there is a proposed huge hike in Business Rates for feed in tariff hydro plants in Scotland, Wales and England. The BHA is working hard to bring this to the attention of the relevant governments. If this affects you please let us know......
by MorHydro
Sun Jan 15, 2017 5:33 pm
Forum: High Head Hydro
Topic: Coanda screen blocking
Replies: 5
Views: 4079

Re: Coanda screen blocking

That is interesting. We have made some further progress on this particular site. There is just nothing visible to the naked eye on the screen when it blocks so we did some chemical analysis and it appears that the blocking is somewhat related to iron content in the water. The iron content spikes aft...
by MorHydro
Sun Jan 15, 2017 5:30 pm
Forum: Medium Head Hydro
Topic: HDPE Weld Beads
Replies: 4
Views: 3401

Re: HDPE Weld Beads

- do you size for minimal friction at full flow, which risks dropout and sedimentation ,or size for self cleaning at higher flows which reduces head? It would be interesting to have your thoughts. What is reasonable pressure drop? 10%? And how about design velocities for self cleaning - is 2.5m/s h...
by MorHydro
Mon Oct 31, 2016 12:22 pm
Forum: High Head Hydro
Topic: Coanda screen blocking
Replies: 5
Views: 4079

Coanda screen blocking

On some of our projects the Coanda screen blocks up at certain times of the year (typically autumn). On one site in particular the screen can almost completely block within hours of being cleaned. Has anyone else found this? any ideas for possible cause or cure?

Thanks.

Go to advanced search