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i I i 16 The Canadian Statesman. Bowmanville, August 1,1984 Waterloo Farmer Warms House Using Cow Heat Robert Bauman, a dairy farmer in Waterloo County has discovered a new home- heating system that makes his conventional oil heater seem obsolete. It is body heal from cows, and he has 40 of them now footing the heating bills for his home. The technology is new, and involves heat recovery from barn ventilation air. For Canada, it's a first. Ron MacDonald, an energy engineer with the Ontario Ministry of Agriculture and Food, designed the system from scratch, together with a heating and ventilating contractor. He says the technology is all Canadian. "The idea was conceived by a dairy farmer here, we designed the system, implemented it, and ironed out the bugs ourselves." It took vision and insight to conjure up the idea. It happened one cold winter's day when Mr. Bauman noticed snow melting around his cow barn. He realized quite a lot of heat was being wasted, so he consulted a contractor about the possibility of recovering that heat. The contractor got in touch with MacDonald at the Ministry. "We looked into the idea and did some preliminary design work to see if the idea was feasible, and we found that it was. So we installed the system and have been monitoring it for just over a year now." The objective was to design a heat pump for home heating, using dairy barn exhaust air as the heat source. Depending on the density of the livestock and the type of animal housed, winter exhaust air temperatures can range from around 10 degrees C. (dairy), to 17 degrees C. (growing finishing hogs) and up to 30 degrees C. (youngchicks). The system was installed at the dairy farm in the fall of 1982. Basically, it consists of an air-to-air heat pump, the same as might be used in a city residence. Only instead of drawing its heat from ambient air, it is drawing it from t)ie exhaust air that's being taken out of the livestock barn. There is no actual physical transfer of any of that air - a suction line from the barn to the home carries vapor which has removed the heat from the barn exhaust air. The home's old heating system was a combination wood/oil furnace. Since the new heat pump was installed, oil has been used only as a back-up. No wood has been burned in the furnace, but some has been used in the kitchen's air-tight stove. MacDonald says the occupants of the home feel more comfortable with this system, probably because it has done away with fluctuations in room temperature previously caused by the oil furnace. This is because the heal pump can run continuously in very cold weather, while the oil furnace had to stop periodically. Installation of the new heat pump has cut oil requirements by 93 per cent. The 150-year- old home (280 square metres of living area, 2 floors, stone walls) in the past consumed an estimated $2,000 worth of oil a year for heating. The present heating cost is about $900 and includes operating and maintenance of the heat pump and back-up oil. Testing will continue until the end of the 1983-84 heating season, and exact figure will then be available. This prototype system cost SR,000. A Canadian Oil Substitution Program (COSP) grant .of $800 was subtracted from that to give an estimated pay-back period of five years. A dairy farmer installing a similar system now could reduce the initial cost and achieve an even better return. The Elmira venture received 50 per cent of its funding from the Ministry of Energy because it was categorized as a demonstration project involving many risks and no guarantees. Farmers installing heat recovery systems would also be eligible for the COSP grant. Ron MacDonald says any dairy farmer who has a barn within reasonable distance to his house can use this system. "I would suggest not' more than 200 feet away, because the cost would be pretty outrageous beyond that." The more livestock available the better, but a minimum requirement is 30 to 40 cows. MacDonald is already expanding on the idea. His next project is a poultry and hog barn combined . . ! heat from a chicken barn will be pumped into a nearby weaning hog barn. TOMORROW'S ; FORESTS... TODAY'S CHALLENGE rk SPECTACULAR SAVINGS TO SMILE ABOUT Prices effective until Monday, August 6th --6:00 p.m. closing time Do Your Own Fencing and Decks! Pressure Treated Pine 1 x 6 x 5' 1.60 1 x 6 x 6' 1.80 1 x 6 x 8' 2.60 2x 4x 8' 3.12 4x 4x 8' 6.70 In-stock Only SALE ON INSULATION Cash and Carry Only Save $$$ on your Winter Fuel Bill! R12-15" 90 sq. ft. R20-15" 50 sq. ft. M3. 80 M2. 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My knowledgeable and friendly staff will be pleased to offer you any advice you may require, and our prices are guaranteed to be the lowest anywhere in the area. Come in and visit us soon." JOE SILVA, President NEW HOURS Mon. toThurs. Friday Saturday 8 a.m. to 6 p.m. 8 a.m. to 9 p.m. 8 a.m. to 6 p.m. Effective August 7th, 1984 ^DURHAM BUILDING A-.--" i v. OVfby V , TTi--' Y-A V// ! W- -o \ \ SUPPLIES TUeimprovement emuMNCONm, 164 Base Line Rd. E. 623-6341 Highway No. 2 w H 0) n Base Line Rd. W. *^| Durham Building I El Highway 401 | Bowmanville