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--></style></head><body lang="IT" link="blue" vlink="purple"><div class="WordSection1"><p style="margin:0cm;margin-bottom:.0001pt;background:white;vertical-align:baseline"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#333333">Dear All,<br>I’m modelling a water centrifugal chiller in System 8 of ASHRAE 90.1 (Appendix G), using HAP by Carrier, for a LEED Certification (LEED C&S 2009).<br>I have to need how calculate the minimum entering condenser water temperature (ECWT) for a water-cooled chiller and the part-load ratio below which cycled operation occurs. This cycling point is defined as a percentage of full load capacity. How I could calculate these data? Should I consider 21 °C as minimum temperature?</span></p><p style="margin:0cm;margin-bottom:.0001pt;background:white;vertical-align:baseline;outline:0px;word-spacing:0px"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#333333">About Cooling Control I understand that 2 chiller equally sized have to be equally unloading. Am I right?</span></p><p style="margin:0cm;margin-bottom:.0001pt;background:white;vertical-align:baseline;outline:0px;word-spacing:0px"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#333333">No instructions are given for Cooling Tower: Full Load Fan kW, fan electrical Efficiency and % Airflow at Low fan Speed. Where can I get these data?</span></p><p style="margin:0cm;margin-bottom:.0001pt;background:white;vertical-align:baseline;outline:0px;word-spacing:0px"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#333333">Then I have to model the Primary/Secondary Systems with variable-speed. In my case the building has a floor area more than 20,000 m2.<br>I have to put in the software the “Mechanical and Electrical efficiency” and the “W/L/s” for both pumps in Primary Loop and in Secondary Loop.<br>How could I calculate the data for the two loops?<br>The ASHRAE in the Section G3.1.3.10 gives me only 349 kW/1000 L/s but not the other data.</span></p><p style="margin:0cm;margin-bottom:.0001pt;background:white;vertical-align:baseline;outline:0px;word-spacing:0px"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#333333">Moreover I have to put in these data for the secondary loop: Control Head (kPa) and Mi<span style="background:white">nimum Pump Flow (%).</span></span></p><p style="margin:0cm;margin-bottom:.0001pt;background:white;vertical-align:baseline"><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#333333"><br></span><span style="font-family:"Calibri","sans-serif";color:#333333;background:white">Thanks.</span><span lang="EN-US" style="font-family:"Calibri","sans-serif";color:#333333"></span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="650" style="width:487.55pt;border-collapse:collapse"><tr style="height:1.0pt"><td width="170" rowspan="5" style="width:127.6pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" align="center" style="text-align:center"><span style="font-family:"Arial","sans-serif";color:#1f497d"><img width="159" height="44" id="Immagine_x0020_2" src="cid:image001.jpg@01D06094.9D277720" alt="INTERTECNO_cmjn_300dpi"></span></p></td><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#002c53">Giusy Amorusi</span></b></p></td></tr><tr style="height:1.0pt"><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style="margin-right:8.75pt"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Ufficio Tecnico Meccanico</span></p></td></tr><tr style="height:1.0pt"><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#002c53">Intertecno S.p.A.</span></b></p></td></tr><tr style="height:1.0pt"><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Viale Marche, 13 – 20125 Milano (Italy)</span></p></td></tr><tr style="height:1.0pt"><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Tel.: +39 02 60 790 290 - Fax: +39 02 60 790 200 – Cell. +39 334 68 38 143</span></p></td></tr><tr style="height:1.0pt"><td width="170" style="width:127.6pt;padding:0cm 0cm 0cm 0cm;height:1.0pt"><p class="MsoNormal" style><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif""> </span></p></td><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><a href="http://www.intertecno.it/"><b><span style="font-size:8.0pt;color:#1f497d;text-decoration:none">www.intertecno.it</span></b></a></span></p></td></tr><tr style="height:1.0pt"><td width="170" style="width:127.6pt;padding:0cm 0cm 0cm 0cm;height:1.0pt"><p class="MsoNormal" style><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif""> </span></p></td><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><img border="0" width="265" height="92" id="Immagine_x0020_1" src="cid:image002.jpg@01D06094.9D277720" alt="intertecno_02_2015_2"></span></p></td></tr><tr style="height:1.0pt"><td width="170" style="width:127.6pt;padding:0cm 0cm 0cm 0cm;height:1.0pt"><p class="MsoNormal" style><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span></p></td><td width="480" valign="bottom" style="width:359.95pt;padding:0cm 5.4pt 0cm 5.4pt;height:1.0pt"><p class="MsoNormal" style><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> </span></p></td></tr><tr style="height:1.0pt"><td width="650" colspan="2" style="width:487.55pt;padding:0cm 0cm 0cm 0cm;height:1.0pt"><p class="MsoNormal" style="text-align:justify"><span style="font-size:7.0pt;font-family:"Arial","sans-serif"">Il contenuto e gli allegati del presente messaggio possono essere riservati e sono destinati esclusivamente a coloro cui sono indirizzati. La natura dei messaggi di posta non è personale e le comunicazioni potranno essere conosciute all’interno dell’organizzazione aziendale. La diffusione, la distribuzione e/o la copiatura del documento trasmesso da parte di qualsiasi soggetto diverso dal destinatario sono proibite. Le opinioni espresse sono quelle dell'autore. Intertecno S.p.A. non assume alcuna responsabilità sul contenuto del presente messaggio, il quale non costituisce un impegno contrattuale tra Intertecno S.p.A. e il destinatario. La sicurezza e la correttezza del messaggio non può essere garantita. Se questo messaggio è stato ricevuto per errore, si prega di distruggerlo con gli eventuali allegati e di contattare immediatamente Intertecno S.p.A. Grazie.</span></p><p class="MsoNormal" style="text-align:justify"><span style="font-size:7.0pt;font-family:"Arial","sans-serif""> </span><span style></span></p><p class="MsoNormal" style="text-align:justify"><span lang="EN-GB" style="font-size:7.0pt;font-family:"Arial","sans-serif"">This message and any attachments may be privileged and confidential and are intended exclusively to the recipients. They are not personal but business-related and other members of Intertecno S.p.A. might have access to their content. If you are not the intended recipient, you cannot circulate, distribute or copy the document. The opinions expressed in this message belong to its author. Intertecno S.p.A. cannot be considered liable for the content of this message, which does not qualify as a contractual engagement between Intertecno S.p.A. and the recipient. Security and correctness of this message cannot be guaranteed. If you are not the intended recipient, please contact immediately Intertecno S.p.A and delete this message and any attachments without retaining a copy. Thank you.</span><span style></span></p><p class="MsoNormal" style="text-align:justify"><span style="font-size:7.0pt;font-family:"Arial","sans-serif""> </span><span style></span></p><p class="MsoNormal" style="text-align:justify"><span lang="EN-US" style="font-size:7.0pt;font-family:"Arial","sans-serif";color:black">Prima di stampare, pensa all'ambiente -- Think about the environment before printing</span><span style></span></p><p class="MsoNormal" style="text-align:justify"><span style="font-size:7.0pt"> </span><span style></span></p><p class="MsoNormal" style><span style="font-size:7.0pt;font-family:"Arial","sans-serif";color:#1f497d"> </span></p></td></tr></table><p class="MsoNormal"><span style> </span></p><p class="MsoNormal"> </p></div></body></html>