Trend of power transmission economics toward operation of large generating stations at high circuit loadings
✍ Scribed by R.H.O.
- Book ID
- 103078001
- Publisher
- Elsevier Science
- Year
- 1948
- Tongue
- English
- Weight
- 74 KB
- Volume
- 245
- Category
- Article
- ISSN
- 0016-0032
No coin nor oath required. For personal study only.
✦ Synopsis
Experimental Gas Turbines Being Constructed.--Two experimental gas turbines, one a 5000-kw. machine for electric power stations, and the other a 4800-hp. unit, are being constructed by the General Electric Company.
Alan Howard, G-E turbine-generator design engineer at Schenectady who headed design and development of the TG-100 Propjet, and TG-180 jet engines now powering the latest U. S. fighter planes, revealed that the company is also concentrating its facilities on gas turbine development in the nonaircraft field.
Shop tests of the 4800-hp. turbine are scheduled to begin soon. The stationary power plant is in the design stage and will not undergo factory test until later.
The 4800-hp. gas turbine will burn Bunker "C" fuel, although work is being carried on in the use of pulverized coal in order to permit more diversified application of gas turbines. The 4800-hp. unit being constructed is approximately 19 feet long and weighs between 2½ to 4 pounds per horsepower.
"We are making drawings," Howard said, "for a 5000-kw. plant suitable for central station or industrial applications. We believe this type of plant, when developed, will prove to have very competitive all-around econony and characteristics when compared with other types of plants in similar ratings."
In this stationary gas turbine, which also will be powered with oil, air flows through two compressors, an intervening intercooler, a regenerator and then into six combustion chambers. Nominal inlet temperature to the turbine is 1500 ° F., with the gases expanding first through a two-stage turbine which drives the high-pressure compressor. Turbine and compressor run at a constant speed of approximately 8700 r.p.m.
The rest of the expansion occurs through the single-stage low-pressure turbine which drives the low-pressure compressor.
R. H. O.