Wikipedia:Reference desk/Archives/Science/2019 August 1

= August 1 =

Another heat pump
heat pump is a device to pump heat (from a cold place to a hotter place). However, in the image here https://www.igi-global.com/chapter/the-diffusion-absorption-refrigerator-operation-and-performance/136746 (not sure of the copyright, so I didn't copy the image) you see a "thermal pump" which is a device to pump upward a fluid using heat. This is quite common, yet not referred to in pump. What would be the name we use for such device, what would be the relevant article? (update)My question is about the specific part used to pump upward the liquid in absorption refrigerator (the use of such pump in these is why I claim it is a quite common device), not the whole refrigerator. It is also used elsewhere, because it is so simple (despite being quite inefficient for sure); I saw it in decorative lamps with fountain effect, for instance. Gem fr (talk) 13:14, 1 August 2019 (UTC)
 * The definition says that it utilizes a Two-phase flow. Maybe that article will help you some?  -- Jayron 32 15:40, 1 August 2019 (UTC)
 * nice, but no, it doesn't help. No mention of use for increased elevation. Gem fr (talk) 20:51, 1 August 2019 (UTC)
 * It looks like Single pressure absorption refrigeration.--Wikimedes (talk) 03:52, 2 August 2019 (UTC)
 * see update, above Gem fr (talk) 04:31, 2 August 2019 (UTC)

What kind of insect is this?
What kind of insect (a moth, I suppose) could this be? The picture was taken today in Southern Germany. The insect is about 5-cm long. Many thanks. --Edcolins (talk) 20:16, 1 August 2019 (UTC)
 * a moth indeed, so Lists of moths could help you. I know no more Gem fr (talk) 20:49, 1 August 2019 (UTC)
 * My vote goes to the bedstraw hawk-moth Hyles gallii. Alansplodge (talk) 21:19, 1 August 2019 (UTC)
 * The German name for it is Labkrautschwärmer if that helps. Alansplodge (talk) 21:35, 1 August 2019 (UTC)


 * Do they swarm around sauerkraut and Labrador retrievers ? SinisterLefty (talk) 03:34, 4 August 2019 (UTC)
 * Would that it were so. More mundanely, Labkraut is also called bedstraw in English (also "cleavers" but my Cubs call it "sticky-grass"). Alansplodge (talk) 19:34, 4 August 2019 (UTC)
 * good find. It has a number of similar, hard to distinguish, cousins, though. Gem fr (talk) 21:50, 1 August 2019 (UTC)
 * True, although the olive-green back seems to be a good recognition point. Alansplodge (talk) 07:40, 2 August 2019 (UTC)
 * Many thanks! Very helpful! Cheers --Edcolins (talk) 19:08, 2 August 2019 (UTC)