<html><body><div style="color:#000; background-color:#fff; font-family:Courier New, courier, monaco, monospace, sans-serif;font-size:10px"><div class="" style=""><span style="font-size: 13px;" class="">Dear TRNSYS users,</span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><span style="font-size: 13px;" class=""><br class="" style=""></span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><span style="font-size: 13px;" class="">I am simulating a GSHP system connected to a 300kW Dry air cooler Type 511.</span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;"
class=""><span style="font-size: 13px;" class="">The Dry air Cooler is controlled when the return temperature from the ground reaches 30degC, </span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><span style="font-size: 13px;" class="">then the Dry air cooler comes on, to maintain the fluid temperature going to the ground to 22degC.</span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><span style="font-size: 13px;" class=""><br class="" style=""></span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><span style="font-size: 13px;" class="">My
question is, I am trying to obtain the amount of power drawn by the fan when the Dry air Cooler is operating. But in order for TRNSYS, to calculate the power drawn, you need to put the power coefficients a1, a2 and a3, how would I obtain this values? Is it a matter of calling the Dry air cooler manufacturer and ask them for this power coefficients or what do I need to do please?</span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><br class="" style=""></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><br class="" style=""></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color:
transparent;" class=""><br class="" style=""></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class="">Thank you</div><div class="" style=""><span style="font-size: 13px;">Metkel Yebiyo BEng (Hons), MSc<o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">CEREB PhD Researcher - Ground Source Heat Pumps <o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">Room T615 <o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">Department of Urban Engineering <o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">Faculty of Engineering, Science and the Built Environment<o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">London
South Bank University, <o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">103 Borough Road,<o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">London SE1 0AA<o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">Tel: +44 (0)20 7815 7639<o:p class="" style=""></o:p></span></div><div class="" style=""><span style="font-size: small;">E: <a href="mailto:yebiyom@lsbu.ac.uk" class="" style="">yebiyom@lsbu.ac.uk</a><o:p class="" style=""></o:p></span></div><div style="background-color: transparent;" class="">
</div><div class="" style=""><o:p class="" style="font-size: small;"> </o:p></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><span style="font-size: 13px;" class=""><br class="" style=""></span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: 'Courier New', courier, monaco, monospace, sans-serif; font-style: normal; background-color: transparent;" class=""><br class="" style=""></div></div></body></html>