Our main focus for Shrove Tuesday will be taking high level readings using balloons and the blimp – quantitative for temperature, and qualitative for air speed and direction. However, we do have some additional equipment that will be using to augment particularly the lower part of the 3D model we build. You can find descriptions and pictures of them in use at last year’s event.
- hot wire anemometers for quantitative measurement of air speed. They’re hand-held, so we can use them wherever we can reach! Our intrepid organist intends to take one as close to the edge of the organ chamber as he can get. That’s the highest accessible point in the space, and a very tight fit that involves squeezing past pipes and knowing which bits of the organ are designed to take weight. The wands are designed to take measurements inside ducts. If we have time, we’ll do the church a good turn and find out whether the fan system in their modern building needs something to block air egress when the fans aren’t in use. That’s something the church’s energy consultant is wondering and couldn’t tell from the access he had.
- hand-held remote temperature sensors. The biggest issue here is that they work up to 12m away, but the highest part of the roof is 14.78m. Luckily, this year, we also have a thermal imaging camera. That’s basically a large matrix of remote temperature sensors that produces pretty pictures as well as giving the underlying data.
- sling psychrometers. They take a bit of time to use, so I think this year we’ll use more than one!
- smoke sticks. We discovered last year that they’re unlikely to set off smoke detectors in a space this big, but that’s especially true for this site – in the worship space, there aren’t any! We might discover that they’re useful for diagnosing the airflow in the chancel. Again, we can do the church a good turn if we have time, and just check the wall vents aren’t blocked anywhere.
Where we can’t easily put things on the 3D model, we can record short videos explaining what we’ve seen. By the time we’re finished, we should know quite a bit about the building.