7 Proper designBleed off endBleed off tube to floor drain or outside
8 Typical WBD (wet bulb depression) of plain area in Taiwan
9 Max. T drop using Fad&Fan in Taiwan oC%WBD (Wet Bulb Depression) = dry bulb Temperature – wet bulb TemperatureT = WBD * Efficiency
10 Software development Tool MATLAB (Mathworks, USA)Popular among EngineersRecent Textbook in Agr. Eng.Takakura and Fang (2002) : Climate under cover -- dynamic simulations of bio-engineering systems using MATLAB. Kluwer Academic Publisher.Cundiff and Mankin (2003)：Dynamics of biological systems. ASAE.
11 PFD (Pad_Fan_Design) Output： Input： System operating curves Fan curves & pressure drop curvesDrawings of GH in 3DLength of Pad requiredFlow rate of PumpSize of SumpMakeup water requiredInput：Dimension of GHDesign criteriaNumber of fansTypes of Pad
12 PFD window1 Enter GH dimension Type of roof Interval between posts Metric,or English unitsType of roof3 types availableInterval between postsNo. of bays per postMisc.
13 PFD window 2 Select 1 algorithm out of 3 NGMA/ACME Munters Air change ROT
14 PFD window 3 Number of fan required (guess value) Select type of pads 9 models of Euromme fansSelect type of pads4 types availableDesign facing velocityExtra pressure dropRequired pad area, lengthCalculated pump flow rateCalculated sump sizeCalculated makeup water
15 PFD window 3 In m3/s, in m3/m2/min Display GH in 3D Display Fan & pad curvesIn m3/s, in m3/m2/minDisplay GH in 3DShow more info. on Pads
25 Conclusion 1The software developed can be served as teaching/research/design tool.The software allows users to pick their options from currently available commercial products most popular in Taiwan, including：9 fans，4 pads3 roofs，3 design criteria
26 Conclusion 2 The software provide fool proof design，including： Interval between fans installed to check too much or too little fansComparison on Pad length and GH lengthThe software provide flexible outputs，including：Fan curves, pad curves and system operating pointGH drawings in 3D and allow for rotate,zoom in and outPump, sump, makeup water requirement