Nature protection technologies

7.4. Thermal imaging diagnostics of energy equipment

Part 7. ENERGY SAVING

7.4. Thermal imaging diagnostics of energy equipment

7.4.1. Currency of applying thermal imaging devices

Makalskiy L.M., MPEI (TU)

The infrared control and scanning play more and more important role in the maintenance of power and industrial equipment. The images, obtained in the thermal spectrum invisible for a human eye, allows without any contact with the object to receive complete information, concerning the temperature distribution on the object surface. It allows finding out the temperature anomalies that often precede to the failures of technical equipment and devices, which could result as well in the emergencies and catastrophes with the heavy environmental consequences.

Part 7. ENERGY SAVING

7.4. Thermal imaging diagnostics of energy equipment

7.4.2. Application of thermal imaging devices at energy enterprises

Makalsky L.M., MPEI (TU)

Generation of electric and thermal energy is concentrated at TPPs and NPPs. Thermal imaging technique allows to determine the deviations from the standard functioning of basic and auxiliary equipment of power plants for the on-time development of planned-prophylactic measures on elimination of the detected preemergency situations.

Part 7. ENERGY SAVING

7.4. Thermal imaging diagnostics of energy equipment

7.4.3. State-of-the-art of infrared imaging technique

Makalsky L.M., MPEI (TU)

Recording of the intensity change of thermal radiation is necessary for determination of the state of energy objects and communications. As it was written before, the pyrometers, infrared imagers and thermal scanners are used as the devices for recording the thermal radiation. The infrared receivers of thermal radiation usually work in the spectral ranges of 3…5.5 or 8…14 µm. Photon heat absorbers usually work with cryogenic cooling of sensors (for example, with liquid nitrogen having a temperature T = 77 K). It strongly reduces the thermal noise, not removed in the other way, and improves correspondingly the threshold sensitivity. Application of microprocessor or thermoelectric cooling systems under the higher temperatures deteriorates these parameters. Nevertheless, the sensitivity of thermal imaging devices achieves, as a rule, of 0.1°C.