Education Commons^™

G95-1244 Ventilation Fans: Efficiency And Maintenance, David P. Shelton, Gerald R. Bodman

University of Nebraska-Lincoln Extension: Historical Materials

This publication describes efficiency and design factors to consider when selecting a ventilation fan. Basic maintenance procedures needed for efficient operation are also discussed.

An energy efficient ventilation system requires good design and good equipment. Selecting efficient ventilation fans and keeping them in good working condition will keep operating costs down.

G95-1242 Ventilation Fans: Performance, Gerald R. Bodman, David P. Shelton

University of Nebraska-Lincoln Extension: Historical Materials

This publication describes how to use fan performance and system resistance data to achieve the desired effect and efficiency of a ventilation system.

Many people perceive ventilation simply as a fan. However, effective ventilation of a livestock building or the aeration of stored grain requires a complete ventilation system.

A simple ventilation system may consist of fans to move the air, inlets or outlets for air distribution, and manual controls. More complex systems may include ducts, perforated floors, automatic controls, and other components. Regardless, all components must be carefully designed, selected, installed, managed, and maintained to achieve satisfactory results.

A …

G95-1243 Ventilation Fans: Types And Sizes, Gerald R. Bodman, David P. Shelton

University of Nebraska-Lincoln Extension: Historical Materials

This publication describes the most common types of ventilation fans and compares their physical and performance characteristics.

Two general types of ventilation fans are commonly used for agricultural applications. Each type has many different blade diameters, materials, blade shapes, speeds, and motor horsepowers available. The desired airflow rate and the resistance to airflow through the ventilation system, or static pressure capabilities, are the two primary considerations when selecting a ventilation fan. Other considerations include maintenance requirements, noise levels, and energy efficiency.

G87-846 Electrical Systems For Agricultural Buildings (Checklist), Gerald R. Bodman, Laverne E. Stetson, Jack L. Schinstock

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide is a checklist to help in evaluating both existing and new electrical installations for agricultural buildings.

Good electrical system design and installation is required to assure a safe, efficient system. Good practices and appropriate equipment are essential.

G87-862 Holding Wet Corn With Aeration (Revised July 1995), David D. Jones, Robert D. Grisso

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses aeration recommendations and corn moisture level limitations for holding wet corn under Nebraska conditions.

Corn is a perishable commodity with a limited shelf life that depends on the moisture content and temperature of the corn. `Shelf life' is the length of time good quality, aerated shelled corn can be stored before losing one-half percent of dry matter. With this amount of dry matter decomposition, it is assumed that the corn loses some quality, but maintains its market grade.

G85-760 Natural Air Corn Drying, Richard O. Pierce, Thomas L. Thompson

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses factors affecting natural air corn drying system performance, and gives recommendations for bins filled over a one- to two-day period.

Natural air drying is an energy efficient drying method that is particularly well suited to Nebraska weather conditions. A high quality dried product, with little of the stress cracking or heat damage associated with high temperature drying, is an added attraction. However, good management practices must be followed to achieve satisfactory drying results.

A major concern with this method is overloading the bin with corn too wet to be dried without spoilage or deterioration, especially when the …