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Lethbridge Herald Newspaper Archives

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Lethbridge Herald, The (Newspaper) - November 21, 1973, Lethbridge, Alberta LETHIRIDQI November 21.1t73 Seven years of research. Oil furnace perfected that may revolutionize home heating By JEFF CARRUTHERS Herald Ottawa Bureau OTTAWA After seven years of federal scientists .with the Canadian Combustion Research Laboratory have perfected an oil furnace with a blue flame that could revolutionize home heating. not too the the development could in a few years be saving some Cana- dians 10 per cent or more in the annual fuel bill. Just as important it could mean the difference in the not too distant future between suf- ficient fuel oil supplies and fuel oil shortages. As an the blue flame will mean less pollution in the air. For the color of the an almost invisible means that all of the cac- bon monoxide in the furnace is being burnt and not gbing up the flue. Inside the furnace there will be significantly less if any. In it is the lack of soot produced by a efficient blue flame which makes all the difference in terms of fuel saving. Dr. T. D. the energy department scientist who is continuing the research on the concept here in explains The typical home oil fur- nace has a yellow flame. The color indicates it is producing soot. In the combustion is often so poor in the that the small droplets of oil are actually being leaving carbon behind. At the beginning of the winter heating ju'st after the service man .has cleaned and tuned the fur- the average home owner can expect a fuel-to-heat ef- ficiency of about 70 or 72 percent. But 10 weeks into the heating about the end of soot accumula- tion inside the furance is so bad that the efficiency has 'dropped to about 60 per often lower. The soot acts as an in- preventing the heat from the flame from being transferred to the air which circulates through your house. One should note that the typical home furnace is at such a low efficiency just at time when the peak heating Reason is beginning. 'By the blue Uame produces no soot while it is running and a little soot at start-up and shut-down. And a furnace with a blue according to tests run at the Canadian Combustion Research starts with a fueHo-heat efficiency .of 75 percent to 80 percent and under the worst con- by a five percent ef- ficiency. That by a fuel saving during the winter season of 10 to 15 per cent. Of there are some problems. the blue flame burner requires a design which is dif- ferent enough that it probably won't fit into most existing furnaces. To achieve the blue the air-oil aerosol mix- ture must be carefully con- trolled. And it's more than installing an air swirl generator around the nozzle. 'This will mean that the new blue flame when they come on the market in a few years in will be limited to people who are either buying new at or more or replacing their old furnaces. It should be noted that one U.S. company this fall started the first commercial blue flame home oil furnace. the blue flame fur- nace will likely cost to HO more than a conventional yel- low flame though one season of fuel savings should make this up. One of the components that will cost more will be the safe- ty shutoff which nor- mally operates by sensing the burner's flame. It is more difficult to detect a blue flame optically than a yellow flame. Dr. Brown says he has a lit- tle more research to do to eliminate the small amounts of soot produced by the blue flame on start-up and shut- down. This probably will be accomplished by using a special solenoid to retard delivery of the fuel un- til a few seconds after start up and to cut the fuel off a few seconds early. 2025 Mipr Mtf rath Orhrt Mill 420-ttfc Strut Sort Vilms Effictivi Til Closing Siturdiy. Nov. 24. Wo Rosorvo tho Right to Limit Qumtitios Side Bacon Swifts S.liced Premium Applewood Lazy Maple 1 Ib. pkg. Oh Assorted 12 inch size. Each Fresh Lamb Gov't Inspected Choice Spring Lamb Leg'O Lamb Rib Loin 1 niu kum Chops Ib.........................I .39 .39 Shoulder Chops Ib............... 99 Lamb Stew Broast. Shanks. Nocks. Ib. 49 Sausage Stix Ukrtinim Swifts Premium Smokod Ib. Eich 1 .99 SHOP and Garden Fresh Produce BANANAS GOLDEN RIPE Wondersoft TOILET TISSUE 4 roll pack asstd.. colors. Pickles McLarens Kent _ 12 oz. jar f DP Each I Miracle Whip Kraft 32 oz. Each...... 79' Each Drano New Liquid Drano 32II. oz. Each Light Bulbs 9SQQ ataRVV Kleenex Chel-Boy-Ardee Cheese Kraft Process CHEESE SLICES Singles 2 Ib pkg. Each -it-Up flOc Rise 'n Shine 7Qo 6oz. pkg. Orange pkg..... V Sherrlff6oz. pkg. Paper TowelsT Pizza Mix 2 roll pack asstd colors 28 oz. pkg. Crisco lib. Pkg. Each Each Each Crisco Oi 128fl.oz.tln Each II 3.40 ;