The Condensing Hive Concept: A Comprehensive Guide
The central idea behind the Condensing Hive is to artificially replicate the manner by which wild bees maintain the level of moisture and insulate their environments.
Moisture is natural
Basically, in order to understand this, it is helpful to look at how bees act in their natural habitat and how their ambient affects the way they manage humidity and heat inside the hive. The production of moisture by the bees themselves is part of their everyday routine. Much like humans, exhaling moisture from their body produces water vapor through respiration and digestion, making the hive environment more humid.
However, the water droplets actually originate from the inside of the hive.
Warm, humid air rises from the beehive cluster, colliding with the cooler hive structure. Bees snuggle up next to each other to stay warm during winter. Rather than generating enough warmth for the hive and all of the contents, they prefer to focus on warming their individual bodily structures and surroundings. In order to warm their cluster to between 80 to 85 degrees Fahrenheit during the middle of winter, and even up to 95 degrees when they are caring for brood, they vibrate their flight muscles and consume honey to keep warm. The cluster temperature is much colder, at fifty degrees, from the outside.
This warmer and more humid air directly above the bees is called a "heat dome," and the creation of the heat dome is attributed to the natural escape of some of this heat from the cluster.
When the warmer and more humid air reaches the hive walls or the hive ceiling, condensation may occur. This condensation has the potential to stress or harm the bees as the droplets may melt and fall on the bees. Insulation becomes important in the prevention of this, especially on top of the hive. Materials such as rigid foam boards with high R-values, over an R10, are good to use for this purpose since they would ensure the hive is not too cold and also reduce the chances of condensation above the bees.
In the wild, hollow trees typically have thick walls to provide good insulation. This thick insulation can frequently attain a width of seven inches. Man-made hives can be remodeled to closely resemble nature by adopting this.
Correct insulation prevents warm, rising humid air from condensing on top of the bee clusters. With proper insulation it naturally falls down and in condenses at the bottom of the box.There is an interesting phenomenon to note here, which is positive. There is a benefit to condensation occurring from within. This helps to regulate equilibrium in the level of humidity, which is essential for maintaining the well-being of bees. On warm days, the bees can actually re-absorb the condensed moisture from the hive's walls and frames to provide themselves with the needed water for digesting honey.
During winter, it is normal for some moisture to form inside the hive, the important thing is to prevent the moisture from dripping down onto the bees themselves or to foster mold and decay. With prudent planning and proper insulating, they can be kept safe and healthy by containing the moisture in places distant from the cluster.
Equally as important as insulating the roof is insulating the walls. Wooden hives can be wrapped or covered with homemade insulation to simulate the thick walls of a hollow tree.Since temperature changes will put a strain on the colony, e.g., extreme heat during summer, these conditions should be maintained throughout the year.
Insulation keeps the higher summer temperatures out just as well as the cold of the winter.
Obviously, though, one always needs to ensure the box size matches the colony's size, especially during the winter. There's little point putting a small colony in a large box and expecting the insulation to actually do much good.
Beekeepers often assume that they need to provide ducts or vents on top for the *moisture* to escape and prevent it from accumulating, but studies and observations of bees’ natural habitats show this is totally inaccurate!!!
While warm cluster air is rising is colliding with the cold air coming through the vents and this creates the condensation at the top of the cluster . They create the problem they are trying to solve, simply because they think in human terms ,not in bees terms.
However, some provide vents or holes on top of the hive to allow air exchange while using wood chips or quilt to prevent moisture from accumulating. But In natural habitat, bees in hollow trees do not need any top vents, just one entrance opening on the ground , and this opening alone is enough to expell the overflow of moisture condensation at the bottom and the Carbon dioxide that is naturally produced by the bees.Since the bees will work harder to keep themselves warm with the ventilation in place, they will use more honey and energy. Most importantly, there will be greater airflow to allow the cold winter air to enter and hit the inner chamber.
The energy of heat, which is entrapped in the form of moisture and which some beekeepers seek to remove, is the third thing that is extracted from the upper hole. Both the water and the heat energy it contains will be lost when water vapor is allowed to float away through the upper hole.
The latent heat would be dissipated within the hive if water vapor were allowed to remain within the hive and be condensed on the walls. In essence, instead of allowing the heat energy to be dissipated to the environment, allowing condensation to occur within the hive leads to a large amount of it being recycled within and support the colony.
Physics Alert: Latent Heat! If you don't remember latent heat from your high school physics class, we'll quickly summarize: When liquid water becomes a gas, the energy that broke the water molecules apart and let them become vapor is still contained in the water vapor. Consider a pot of water on a stove. The flame is adding heat to the pot, and it increases the temperature of the water until it hits the boiling point. After that, the water stays at the same boiling temperature, even though the flame is still pumping heat into the pot. That heat is no longer increasing the temperature of the pot of water. Instead, the flame's heat energy is being used to break some of the water molecules free as steam. The water vapor molecules float off, carrying that extra heat with them. What happens if that steam touches a cold surface and condenses? It's going to release all that latent heat as it shifts from gas to liquid again. This is the heat that is being conserved in a hive that doesn't vent that moist air out into the environment.
Bees thrived in natural condensed hives over millions of years, the Condensing man made Hive is an approach towards an organic level of efficiency, and balance with the all natural moisture.It is possible for a beekeeper to promote a healthy beehive with a high survival rate during the winter and minimization of honey use due to insulating and moisture management, rather than ventilation. This will ensure that there is enough honey left for the rapid development of brood when spring comes.
References:
- Hayward, R. W. *The Bee Space*
- Seeley, T. D. *The Living Hive*
- Conrad, R. *Beekeeping Naturally: An Organic Approach*
- “Thermal Regulation and Moisture Control in Wild Bee Hives,” Journal of Apicultural Research
- “The Role of Insulation in Hive Wintering Success,” Bee Culture Magazine
- “Natural Hive Design and Its Implications for Modern Beekeeping,” Journal of Apiculture
- Scientific Beekeeping (scientificbeekeeping.com)
- BeeInformed.org
- Mann Lake’s Beekeeping Resources
- YouTube channels: *The Bee Whisperer*, *Natural Beekeeping*
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