Food industry
Thermal insulation of water supply, heating, ventilation and air-conditioning systems with foam rubber materials helps solve a whole range of problems related to operation of this equipment. Resistance to condensate formation, reduction of heat losses, prevention of mould formation and corrosion are obvious advantages of using RU-FLEX products. The products are certified for use in the food industry.
Ventilation and air-conditioning equipment regulates the microclimate in rooms. Besides excellent thermal-physical properties, a particular advantage of using foam rubber thermal insulation products is their environmental friendliness. RU-FLEX thermal insulation solutions meet the requirements of the food industry.
To help choose the right RU-FLEX VENT-SK insulation thickness, we have prepared ready-made solutions (basic calculations).
Problem and solution
- 01Prevention of condensation on the outside surface of the duct.
- Calculation of insulation thickness for the supply ventilation system
- 02Prevention of condensation on the inside surface of the duct.
- Calculation of insulation thickness for the exhaust ventilation system
Calculation of insulation thickness for the supply ventilation system.
Initial data
- Heat transfer medium: air
- tо = 20 ˚С – temperature in the shopping center;
- tm = -25 ˚С – temperature of the heat transfer medium in the duct, winter time;
- ϑв = 4 м/с – velocity of the heat transfer medium;
- ϕ = 60 % — relative humidity in the shopping center.
| Duct dimensions, mm | Calculated insulation thickness RU-FLEX VENT-SK, mm | Recommended insulation thickness RU-FLEX VENT-SK, mm |
|---|---|---|
| 150х150 | 15,71 | Р19 |
| 200х200 | 15,98 | |
| 450х450 | 16,47 | |
| 900х600 | 16,65 |
| Duct dimensions, mm | Calculated insulation thickness RU-FLEX VENT-SK METAL, mm | Recommended insulation thickness RU-FLEX VENT-SK METAL, mm |
|---|---|---|
| 150х150 | 22,87 | Р 25 |
| 200х200 | 23,38 | |
| 450х450 | 24,4 | Р 25 |
| 900х600 | 24,78 |
P-Designation of the roll-fed material.
Calculations made according to SP 61.13.330.2012 RF
* If a ready-made thermal insulation solution is a construction consisting of two or more layers, it is recommended to use thermal insulation material ST with ALU coating.
Calculation of insulation thickness for the exhaust ventilation system
Initial data
- Heat transfer medium: air
- tm = +20 ˚С – temperature of the heat transfer medium in the duct;
- tокр = -25 ˚С – ambient temperature (coldest five-day period (0.92) in Moscow);
- ϑв = 4 м/с – coolant velocity;
- φ = 80 % — relative humidity of the ambient air.
According to the technical specifications (TS), RU-FLEX outdoor installation is possible if coatings are used to protect the surface of the products from weathering.
| Duct dimensions, mm | Calculated insulation thickness RU-FLEX ST PROM ALU, mm | Recommended insulation thickness RU-FLEX ST PROM ALU, mm |
|---|---|---|
| 150х150 | 16,6 | Р19 |
| 180х180 | 16,79 | Р19 |
| 200х200 | 16,87 | Р19 |
| 450х450 | 17,37 | Р19 |
| 900х600 | 17,6 | Р19 |
Ventilation of apartment buildings according to SP (Construction Regulations) 60.13330.2012 is permitted with combustible materials of flammability group not lower than G1. In most cases, general ventilation systems in residential buildings are used.
The main purpose of foam rubber insulation in apartment buildings is to reduce mechanical and aerodynamic noise and to prevent condensation. For these purposes RU-FLEX VENT can be used, which is a good soundproofing material and at the same time prevents condensation. To meet the requirements for thermal insulation, RU-FLEX VENT has a flammability group G1.
Calculations made according to SP 61.13.330.2012 RF