Multi-purpose test: hive body materials, paint colors, ventilators, exposure to the Sun and so on
Different materials have a different ability to absorb, store
and reradiate heat...
Four main factors influence on hives ability to absorb, store and reradiate heat:
- type of materials;
- surface condition;
- total surface area exposed to the Sun;
- an angle of Sun beams radiation.
- to keep your hives in a cool condition , you have to use aluminum or gloss white/silver paints. Typical white paint absorbs just 8-10% of radiation.
- to keep your hives in a warm condition, you have to use dark color paints (flat sheen).
You can use industrial quality paint/stain, developed specially for beekeeping industry: (1 gallon of "Reflective Aluminum" - $27.95, 1 gallon of "Alkyd Gloss Oil" - $23.95, 1 gallon of Acrylic Latex (Flat) - 22.95. One gallon of paint will cover approximately 50 deep hive bodies with one coat.
My bee yard is under full sunlight from 8 am to 3 pm
There is partial sunlight from 7:30 am to 8 am
and from 3:30 pm to 5 pm.
For this test, all hives have 10 Piergo frames and are without bees.
Description of the hives (from the Left to the Right):
- #1 - wood hive (3/4" thickness) with an Inner Cover. Dark Color - Brick;
- #2 - wood hive (3/4" thickness) with an Inner Cover. Light Color - Of Wight;
- #3 - wood hive (3/4" thickness) with Bee Cool Ventilator. Dark Color - Green;
- #4 - wood hive (1 1/2" thickness) with THSCU (without wool for the summertime, all ventilation holes are open). Dark Color - Green;
- #5 - wood hive (3/4" thickness) with my own design Ventilator; Dark Color - Braun;
Sensors are located in the center of the area above the frames.
|Date||Time||Sun/Shade Temperatures||Hive #1||Hive #2||Hive #3||Hive #4||Hive #5|
|Apr 16||1 p.m.||+42.7C/+23.5C||+33.0C||+30.0C||+25.0C||+25.4C||+20.9C|
|Apr 17||3 a.m.||-1.8C/-1.8C||-1.1C||-1.1C||-0.5C||+0.2C||+0.3C|
|Apr 18||10 a.m.||+33C/+25.4C||+28.1C||+27.71C||+27.7C||+21.0C||+25.0C|
|Apr 19||9 a.m.||+36.7C/+22.9C||+20.7C||+20.71C||+21.0C||+15.1C||+21.0C|
|Note: Around 2:40 p.m. the fan of Bee Cool Ventilator stopped spinning, because sun has moved to the back side of the solar panel (Hive #3). But ventilator of Hive #5 continued to work, thanks to the backup battery.|