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Problems and Causes
Large industrial ovens without external surface insulation (only having internal insulation) not only lead to unnecessary production costs but also create unsafe conditions and heat stress for employees working near the ovens. Although the facility owners have attempted to install additional ventilation fans in multiple locations, the working area temperature still exceeds standard levels due to constant heat radiation from the oven surface. This is because the problem hasn’t been addressed at the heat source, which is the main cause.
Improvement Methods
Initial site surveys revealed that while the industrial oven had internal insulation, its external metal surface was not insulated. This resulted in an average external surface temperature of 95 degrees Celsius, with some areas, particularly around the oven door, reaching up to 110 degrees Celsius. The oven operators requested removable thermal insulation that would be convenient to install and remove, saving time during maintenance or surface inspection procedures. NTI calculated the appropriate insulation by considering thermal conductivity and insulation thickness that aligned with the customer’s budget, before installing ZAVE® removable thermal insulation on all five sides of the oven.
Improvement Results
| Comparison Table: | Average Oven Surface Temperature (Celsius): | Annual Heat Loss (kW): | Annual Electricity Cost (Baht): |
| Before ZAVE® Insulation: | 95.0 | 110,304 | 187,512.00 |
| After ZAVE® Insulation: | 37.0 | 7,524 | 12,792.00 |
| Reduction: | 58.0 | 102,780 | 174,720.00 |
