Concept – Livestock

General: Heat: Heat is transferred in 3 ways: , , and . In summer, or, in hot climates, majority of heat transferring through building envelop in form of Radiation Heat.

Correct design, including suitable insulation selection eliminates the and reduces to minimum possible phenomena. This will increase farm yield and reduce operation costs.

Polynum™ products (Link to livestock introduction products page) were designed to block 97% of incoming radiation heat, using multi pure aluminum foil technology incorporated with low K air cavities.

Livestock buildings require special attention. Aside from animal comfort, which is important matter for itself, insulation has direct effect on farms yield, profitability and pay-back time.
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A direct flow of heat through a material, resulting from direct physical contact. Heat transferred by conduction is governed by the fundamental equation described by Fourier’s Law: (rate of heat flow) = k x (Area) x (Temperature Gradient). Thermal conductivity: The ability of an object to move heat from one part of itself to another part. The higher the K value (thermal conductivity value), the faster the heat will transfer along the substance. Air has very low K (thermal conductivity). Vacuum’s thermal conductivity equals to zero (such as in outer space). Heat conduction can not take place in vacuum! Polynum™ products make smart use of air and low K materials to minimize thermal conductivity and providing protection against thermal bridges between building elements.
Heat transfer by movement of air. Convection is the circulation of hot or warm air. As the air heats up, it becomes less dense, and rises. Cool air is then forced down and warmed by the heat source in a continuous cycle, or convection loop. The stiller the air is, the less heat transfer occurs through convection. Polynum™ products are totally airtight and effectively seals out wind. Its internal composition – trapped dry air bubble film and layers of steady trapped dry air – considerably reduces convection. Same as conduction heat, convection heat is not possible in vacuum. The different of temperature between hot and cold area is described as thermal gradient.

The flow of heat energy between two surfaces with no physical contact (I.R Radiation) Resistance to radiation measured by Emissivity (E). The lower the Emissivity value the better the resistance to radiation heat. The more the radiation is reflected, the less heat transfer occurs. Polynum™ two faces made of 99% pure High Resistance Aluminum give it a reflective power of 97%. Radiation is the only form of heat which transfers through vacuum!


The sun’s infrared radiation tremendously increases the temperature of black bodies that absorb it. This is known as the “Black Globe Effect.” The “black-globe effect” has a pronounced consequence on cost efficiency of weight gain in meat producing animals and birds. When outdoors, in temperatures that exceed 25°C, an animal absorbs virtually all of the radiant energy from the sun. Even when confined to a building, the “black-globe effect” increases body heat in men and animals by 2 to 3.5º C more than air temperature. This heat increase significantly affects creature comfort and generates heat stress.
When a live animal has difficulty in achieving the balance between body heat loss and body heat production. When we, humans, are hot, we lose appetite; our need for water increases and our normal functioning decreases. Heat stress has the following affects on animals:
  • It increases mortality rate!
  • Excessive energy is spent to maintain body temperature, resulting in loss of weight.
  • Heat Increases water intake and reduces overall production yield
  • Heat stress makes it harder to achieve food conversion target ratio
  • Heat stress affects the carcass quality of broilers and pigs
  • It affects back fat thickness of pigs
  • It affects the productivity of laying hens