Description

Track: Fundamentals and Applications
Sponsor: 2.2 Plant and Animal Environment, 8.10 Mechanical Dehumidification Equipment and Heat Pipes, 9.8 Large Building Air Conditioning Systems
Chair: Carol Donovan, Member, Alares LLC, Quincy, MA
This session presents approaches to energy efficient plant and livestock environments. Latent and sensible heat load calculation methodologies for both environments are a focus. Plant environments tend to use closed loop systems with minimal or no makeup air. Livestock environments tend to use open loop systems with minimal or no recirculation air. Presenting the calculations for both plant and livestock thermal environmental modification and control shows the two extremes of HVAC system design – fully closed loop versus fully open loop.

1. Latent and Sensible Calculations for Indoor Plant Growth
Craig Burg, Member, Desert Aire Corp, Germantown, WI
A limited amount of data exist for the prediction of latent energy generated by the growth of plants indoors. Although methods exist for outdoor crops, there are differences in indoor environments. Plant transpiration and evaporation is effected by light in specific spectrums, vapor pressure deficit at the leaf surfaces, and leaf temperature. Crop and watering techniques also have an impact. In a closed system, the watering rate is the same as evapotranspiration, but the rate of transpiration changes throughout the growth cycle. This presentation shows calculations and correlation to real rooms by comparing the predicted data and measurements.

2. Calculation Methodology for Preconditioning Inlet Air for Livestock Facilities
Joe Zulovich, Ph.D., P.E., Affiliate, University of Missouri, Columbia, MO
Traditional heat abatement systems for livestock facilities are not able to provide sufficient heat stress relief for high performance livestock operations located in hot and humid climates. In climates where traditional heat abatement systems are fully effective, the amount of water required to provide the heat stress relief is becoming a major concern. This presentation provides an overview of livestock ventilation system design methodologies and current heat abatement systems. A new livestock ventilation design calculation method is presented that can assess dehumidification by DOAS as a potential option for less water intensive heat abatement systems for livestock facilities.

Presented: Wednesday, January 24, 2018, 9:45 AM-10:45 AM
Run Time: 60 min.

This is a zip file that consists of PowerPoint slides synchronized with the audio-recording of the speaker (recorded presentation), PDF files of the slides, and audio only (mp3) for each presentation.

Citation: ASHRAE Seminar Recordings, 2018 Winter Conference, Chicago, IL

Product Details

Published:

2018

Units of Measure:

Dual

File Size:

1 file , 62 MB

Product Code(s):

D-CH18Sem60