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Jain Solar Water Heating System - PUF Insulation
The salient features of PUF insulation are as follows:
- Rigid insulating material, minimum 90% closed cells.
- Remains durable for years.
- No thermal bridges.
- High mechanical strength, maintains insulation effectively.
- Compression strength → > 1kg/cm².
- Water absorption → Upto 3% of foam volume.
- Effective temperature range → -40° to 150°C.
- Heat conductivity factor → <0.02kcal-m-hr-°C.
Jain Solar Water Heating Systems are insulated with selective grade CFC free PUF as insulation material. PUF insulated collector and tank ensure superior performance with minimum heat loss.
HDPE clad PUF insulated precast pipes are used for insulating the system piping and hot water distribution piping upto the end use points.
Comparisons of Properties of Different Cold Insulation Materials
Insulating Material |
Density |
Thermal Conductivity
W/MK(10ºC) |
Compressive Strength KPA |
Relative Moisture
Absorption |
Expanded Polystyrene 15 |
15 |
0.040 |
35 |
Medium |
Expanded Polystyrene 30 |
30 |
0.037 |
110 |
Medium |
Extruded Polystyrene |
32 |
0.27 |
300 |
Medium |
Polyurethane Foam |
36 |
0.018 |
200 |
Low |
Phenolic Foam |
32 |
0.027 |
170 |
Low |
Cellular Foam |
125 |
0.41 |
700 |
Low |
Mineral Wool |
24 |
0.045 |
Negligible |
Very High |
Polyurethane Foam As a Insulating Material
Rigid insulation, minimum 90% closed cells, remains durable for years, no thermal bridges, high mechanical strength, maintains insulation effectively.
| Pressure strength |
0.5 to 6 kg/cm² |
| Water absorbency |
0.5 to 3%of foam volume |
| Effective temperature range |
40ºC to 180ºC |
| Heat conductivity factor |
0.017 - 0.025kcal - M - HRºC |
Results
As an overall conclusion, Rigid P.U. Foam emerges as a material with extremely effective thermal insulation qualities and high strength to weight ratio at low temperatures. These inherent physical characteristic enable it to perform extremely well with other alternatives products.
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