OCR Text |
Show Appendix A Canadian Gas Turbine Inventory The following is an estimate of the extent of use of existing gas turbines in Canada, and represents what is expected to be inservice by the end of 1994. Note that several additional projects involving cogeneration and pipeline facilities are in various stages of planning and construction. At the same time other older units may be in the process of being retired. The attached tabulation includes the number of installed units of a particular manufacturer's model, an estimate of the total number of Megawatts (ISO) installed, and where possible an estimate of hourly uncontrolled NOx production (assuming gas fuel). Power totals for combined cycles include only the prime mover, and not the steam turbine. The information may assist in providing an approximation of the annual total NO~ production by such units in Canada. Further work on emissions 1nventories is being done by Environment Canada. Note that several companies will be introducing low emission combustors in the 1993-96 period. In attempting to arrive at this total, assumptions must be made of the operating hours and load profile of units, and the type of fuel used. The units also have varying operating conditions depending upon ambient air conditions (winter or summer). A preliminary estimate could be arrived at using the following assumptions and the tabulated hourly NOx production estimates: - the average base loaded gas compressor unit would run at 5000 hours per year, and on average at about 15°C ambient temperature. Half of this time would be at 100% load and half at 80% load. - cogeneration plants would operate on a similar basis, but for about 6000 hours, with some form of moderate emissions control. - the majority of peaking units would probably run on liquid fuel for an average of about 200 hours per year at full load (NO production from liquid fuelled units is assumed to be 80 per~ent higher than on gas fuel). PROJECTED CANADIAN ANNUAL NOx PRODUCTION PROK GAS TURBINES (1994) Gas Compression Combined cycles Electric Peaking MW installed 3400 1100 2500 MW-hours 17 million 6 million 0.5 million Annual HOx 33000 t 5000 t 2000 t The total of 40 kilotonnes would result in an average emission level of 1.7 kg/MW-hr, when part load operation is considered. Totals for 1990 would have been approximately 30 kt. without any new controls, emissions could reach 80 kt/yr by year 2000. |