Insulation testers reach the parts others cannot
Insulation tester maker Megger has launched the S1-554 and S1-1054 high-voltage insulation testers suitable for use in noisy electrical environments like substation switchyards.
The S1-554 insulation tester offers a variable test voltage up to 5 kV and measures insulation resistance up to 15T ohms, while the S1-1054 operates at voltages up to 10 kV, and measures resistance up to 35T ohms. Both of the new testers feature fully automated operation and offer comprehensive facilities for insulation resistance (IR), polarization index (PI), dielectric absorption ratio (DAR), step voltage (SV) and dielectric discharge (DD) tests.
GE makes waves with power boiler cleaning
GE Energy has launched Powerwave+, an impulse boiler cleaning system that enhances boiler operation at coal fired power plants.
GE Energy says that a single Powerwave+ system using pulse detonation technology on a representative 268 MW coal boiler running 8760 hours per year improves heat transfer rate efficiency by 0.54 per cent. This equates to savings of up to 5390 tonnes of coal or the equivalent of 14 491 MWh per year of power versus soot blowing technology.
It also reduces the amount of coal burned for power generation, which in turn reduces the amount of ash dust generated and collected for disposal by up to 448 408 kg per year, the amount of flyash dust by up to 2253 kg per year, the amount of carbon dioxide emissions by up to 11 559 tonnes per year and the sulphur dioxide emissions by up to 50 tonnes per year.
GE also claims that replacing ten soot blowers with one Powerwave+ on the example system would eliminate the need for steam soot blowing. This, in turn, could save up to 940 383 gallons of water per year, according to GE Energy.
Dynamic engine sensors feel the pressure
PCB Piezotronics has launched a series of pressure sensors for monitoring dynamic combustion pressure in diesel and natural gas fired engines.
The sensors allow extended maintenance intervals, improved fuel efficiency, and lower NOx emissions. Featuring piezoelectric sensing elements with rapid response times, they are best suited for continuous monitoring or periodic walk-around cylinder balancing. Versions are available for explosive gas atmospheres.
These sensors have measurement ranges up to 250 bar and a maximum pressure of up to 300 bar. They are suitable for use up to 300 °C, and are packaged in stainless steel housings with rugged cables and connectors. Series 175 features a robust M14 thread, and may be mounted to existing engine pressure indicator valves.