When considering the thermal insulation of bee hives, we also have to consider the honeycomb construction with its air layers in between. These layers themselves act as thermal insulation. The more honeycombs between the bee cluster and the side wall, the higher the insulation. I.e. with regard to the side thermal insulation, the broad constructions of the modern hives are quite helpful.
Almost 100 years ago, straw hives with frames were already used for beekeeping. The hive has a wooden bottom, the entrance hole is only a small slit, the side walls are made of straw and the lid is a double-walled wooden construction with straw filling. In these hives there were no problems with mould and … Read moreStraw bee hive with frames
In Wales, there is a region where treatment against the Varroa mites has been successfully stopped. The interviews in the following video were made in 2015 for the film “Outside the box“, which will be finished in 2018.
The DHT21 sensors used in the “Beelogger” are capacitive sensors used in modern electronic absorption hygrometers. This type of sensor uses a hygroscopic layer as dielectric between the two electrodes of a capacitor. The absorption of moisture in the dielectric changes its properties and so the electrical capacity of the sensor.
In “The nest of the honeybee” in 1976, Tom Seeley describes a random alignment of the entrances in tree cavities inhabited by bees. Unfortunately, he does not give data on the alignment of uninhabited tree cavities in the region. It is therefore not possible to verify whether the bees prefer a certain direction for the entrances of their tree cavities or not.
The antiseptic function of propolis is generally known. This property slows down the development and spread of pathogenic germs in hives and tree hollows. However, propolis also fights condensation and mold in a different way, which is probably unknown to beekeepers. It is a simple physical effect: In the propolis layer there is no capillary condensation, propolis is not hygroscopic.
The first self-made data loggers (beelogger solar SD) according to the instructions of Thorsten Gurzan (www.beelogger.de) go into operation!
- Waterproof housing, suitable for outdoor use, with screw-on device
Each measuring station contains 3 combined sensors for humidity and temperature, with an accuracy of ±0.5°C or ±3%.
- Equipped with a real-time clock, i. e. the data is written with a time stamp. This real-time clock also records the temperature in the housing.
The Diffusion lid works, but not as well as calculated:
The calculations for the diffusion lid are basing on approved calculation methods of building physics. The difference in the temperature, the thickness and the type of the material are decisive for the amount of water vapor diffusion.
You can see the grooming several times a day in my video recordings. Sometimes “Grooming Bees” appear and work off one bee after the other. However, grooming is usually started without planning. Shaking and cleaning movements of a bee (that wants to free itself from pollen/parasites) are apparently the trigger. Under Videos I have already published both versions.