New datalogger now available

We have now added another datalogger to our range to enable customers to select the optimum system for their requirements.

The WindSeer is based around the new Campbell Scientific CR1000 datalogger and the standard package is fully cabled and commissioned to incorporate a flashcard backup and GSM connectivity.

With our in-house CSI expertise we can offer a full range of programming options making the WindSeer the wisest and most capable of our logger range.

You can read more about the WindSeer (pictured left) by clicking here or by going to www.nexgenwind.com

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How long is a boom?

Well it seems to depend on how many boffins are sitting round the table…

There is now a new draft standard, IEC61400, which is already being quoted by customers although, to our eyes, it is primarily aimed at wind turbine performance monitoring. Unfortunately, those of us practically involved in wind assessment studies were never involved in the decision making, and as booms and arms get longer they get less practical given the problems of vibration, icing and birds sitting on these perfect perches! We are also required to meet the latest Garrad Hassan specifications for a large proportion of our customers. The two specifications are similar, but differ in that GH require all sensors to be on single booms on the same side of the mast.

We have redesigned our two basic boom/arm combinations to meet the minimum requirements of IEC61400 where anemometer cup heights are 15 times the boom diameter above the boom. The boom length for the Class One masts and the upper booms on the HiMasts are almost 10 times the mast tube diameter and the lower booms on the 220mm tube are approx 9 times the mast diameter. All manufactured in stainless steel.

These proportions enable us to keep the sensor mounting structure as rigid as we can for a reasonable price. However, our boom manufacturing unit can always produce booms to the dimensions you wish, and we are well aware that some customers take no notice of these standards at all!

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Icy conditions

At one time there was Rime ice and Glaze ice, and now there are all sorts of categories of ice - so many in fact that we now have new standards for icing.

Icing will always be a problem for temporary masts, although the monopole we use is a lot less susceptible than needle lattice structures. We have now incorporated the latest glaze ice into our computer software performance prediction and this has adjusted the windspeed envelope for higher icing levels. This is still a moving target as new standards are still coming out, but if you would like a copy of the latest loading envelope with ice then please contact us

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Tension causing stress?

Many installation crews have a “feel” for guy tension using the 5mm guys on our Class One range. However, our industry-leading HiMast uses slightly heavier 6mm guy cables, meaning the HiMast guy tension can be more difficult to assess.

To solve the problem we have now developed a simple clip-on guy tension meter that gives a good indication of the necessary tension to be left in the side guys when installing. Just send us an email if you're interested or give Gavin a call on 01453 759408.

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Got any good ideas?

Most of those we met at EWEC went away with an Idea Pad to jot down those brilliant insights which occur just when you don't have anywhere to make a note.

If you'd like a pad yourself then send Wendy an email and we'll post you one.

Best wishes

Nexgen Team
www.nexgenwind.com

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