tailieunhanh - Dairy Farm Energy Management Handbook phần 4

Những người hâm mộ HVLS chỉ được khuyến cáo cho các ứng dụng nhà ở lỏng lẻo với chiều cao bức tường cao bên. Nếu người hâm mộ đang được sử dụng, lựa chọn những hiệu quả nhất, và chắc chắn rằng họ đang được trang bị động cơ hoàn toàn kèm theo (xem phần trên Electric Motors). | Equipment Operation and Maintenance Electric Motors Electric motors available in a variety of sizes - from the very smallest to the largest - obviously play a dominant role on any dairy farm. But like anything else that helps power your farm they don t take care of themselves and they can consume a lot of electricity unless of course you are using high-efficiency ones. In fact the purchase price for an electric motor is often very small compared to the electricity cost to operate the motor over its lifetime especially when the motor operates more than one third of the time and the cost of electricity exceeds per kWh. 9 -o - TEFC motors are designed to This is one of the primary reasons why prevent iTJojstnrej dust and dirt investments that you make today to improve your ựewÍ efficiency will yield returns throughout the life of the motor. L . . i Plus such investments in efficiency will help soften the blow to the pocketbook if energy prices continue to increase. So when it becomes necessary to replace an electric motor always consider making the extra investment in a high-efficiency motor as compared to standard efficiency because buying the cheapest motor may save you some money today but it may end up costing you more during its life span. When selecting motors don t be penny wise and pound-foolish. It s always a good idea to avoid the cheap brands and instead consider upgrading to high efficiency units. In terms of life span energy savings and consistency in operation they are very well worth it in the long run. Totally Enclosed Motors - sometimes referred to as a Total Enclosed Fan Cooled motors - or TEFC - are well suited to dairy operations. These TEFC motors are designed to prevent moisture dust and dirt from getting into the motor s windings and are required by code in Wisconsin. The TEFC motors are considered essential for long life under the harsh operating conditions found on farms according to the University of Nebraska - Lincoln UNL .