![]() ![]() It is generally in the shape of a sphere or ellipsoid, sometimes flattened on one side when it is, for example, just under the frame cover. all the bees in the colony have joined it - at 7☌ the individual rapidly collapses at lower temperatures. The cluster aggregates as soon as the outside temperature drops below 15☌ it is complete - i.e. The minimum external temperature of this cluster is 7☌. We know that bees aggregate in a cluster. To state the problem, we start from a few principles: Here comes the opportunity to dust them off and to use them for beekeeping. I used them for many years in sizing helicopter turbines. It was a long time I hadn’t taken out my old heat transfer equations. Clearly, if there is one side where the losses are important, it is the roof. Isn't this evidence that the bees are heating the inside of the hive and that some heat is being dissipated from above? Hives without insulation.īased on this observation, I wondered what the heat loss through the roof was. The snow completely covers the roof of the R6 hive, while it has melted all around the center stone of the other hives. I realized an interesting difference on the roofs of the hives between the R6 which is empty and the others inhabited with bees that I could clearly hear "vibrating". The second one, which definitely motivated me to act, is the observations after a snowfall. 4☌ or less reached inside the hive, that's cold! low temperature alerts inside the hive The first one is the low temperature alerts I received several days in a row. To put this situation into perspective, during these last few years, I did not had any worries with the winter crossing, but this month of January, there are two things that make me wonder that some decisions should be taken. They already had to overcome the hornet season in autumn and now they were facing unexpectedly cold days. I was fearing my bees being stressed under those conditions. Days with 2 or 3☌ maximum temperature had been usual. The month of January 2021 was particularly fresh in the south-west of France. In which case you should consider hive insulation? Depending on the latitudes, the winter can be more or less mild and the colonies can go through a variety of situations. ![]() In winter, bees consume their stored resources for food and heat. ![]()
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