American Society of Agricultural and Biological Engineers

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The Use of a Central Extraction Ventilation System for Pig Facilities, Energy Savings and Economic Consequences

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  014050,  2001 ASAE Annual Meeting. (doi: 10.13031/2013.3673) @2001
Authors:   A.V. van Wagenberg, I. Vermeij
Keywords:   Ventilation, energy consumption, pig housing, fans

A central ventilation system, which extracts air from several rooms into a central air channel, is often used in practice in Western Europe, especially in new pig facilities. An important advantage of this central ventilation system is the energy reduction that can be realised. For a central ventilation system the central fans are powered by variable frequency controllers, which have a higher energy efficiency than the conventional triac controllers. In this research a calculation method was developed to determine the energy consumption for ventilation in pig facilities with a conventional triac controlled fan per room and with a central ventilation system. Calculation methods for both ventilation systems were successfully validated. With the calculation method developed the energy consumption for ventilation for several cases was calculated, and also the yearly costs of some facilities with both ventilation systems were estimated. For a facility for growing-finishing pigs the energy consumption calculated was 30% lower for a central ventilation system than for a ventilation system with one fan per room. The economic evaluation showed that for a facility for growing-finishing pigs, one ventilator per room resulted in the lowest yearly costs. Central ventilation had higher yearly costs of US$ 0.88 per animal place because of the higher investment costs. An important advantage of a central ventilation system is energy reduction. However, when none of the other advantages of the system are used (shifting the emission point, integration of exhaust air treatment like air scrubbing), cheaper alternatives are available to reduce energy consumption for ventilation.

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