<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:10pt"><div id="yiv6206190985"><div><div style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 10pt; background-color: rgb(255, 255, 255);"><div id="yiv6206190985"><div id="yiv6206190985yui_3_16_0_1_1409773050248_3885"><div style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 10pt; background-color: rgb(255, 255, 255);" class="yiv6206190985yui_3_16_0_1_1409773050248_3785" id="yiv6206190985yui_3_16_0_1_1409773050248_3884"><div id="yiv6206190985"><div id="yiv6206190985yui_3_16_0_1_1409745842588_13618"><div style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 10pt; background-color: rgb(255, 255, 255);" class="yiv6206190985yui_3_16_0_1_1409745842588_13555 yiv6206190985yui_3_16_0_1_1409773050248_3786" id="yiv6206190985yui_3_16_0_1_1409745842588_13617"><div
id="yiv6206190985yui_3_16_0_6_1409745842588_4" class="yiv6206190985" style=""><span id="yiv6206190985yui_3_16_0_6_1409745842588_20" class="yiv6206190985" style="">Dear TRNSYS user,</span></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color: rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13558 yiv6206190985yui_3_16_0_1_1409773050248_3789"><span id="yiv6206190985yui_3_16_0_6_1409745842588_48" class="yiv6206190985" style=""><br style=""></span></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color: rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13561 yiv6206190985yui_3_16_0_1_1409773050248_3792">Did anyone face a problem
of getting COPs greater than the rated one in a solar assisted absorption system? Where COP rises to around (0.8) at the start of the simulation and gets down to an average (0.75) for the rest of the day, whilst the rated cop is (0.7).</div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color:rgb(0, 0, 0);font-size:13.63636302948px;font-family:verdana, helvetica, sans-serif;font-style:normal;background-color:transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13561 yiv6206190985yui_3_16_0_1_1409773050248_3792 yui_3_16_0_1_1409773050248_9826">I assumed the set point temp for the Aux heater 70 C and the <span id="yiv62061909853459d9b6-39d5-4054-bab9-6e798f76eee5" class="yiv6206190985GINGER_SOFTWARE_mark"><span id="dec4abe9-44e7-4637-97da-6f7cc688bf54" ginger_software_uiphraseguid="2ce9a1e6-59d4-4e10-9682-4aa25a79d428" class="GINGER_SOFTWARE_mark">timestep</span></span> was 1min</div><div
id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color: rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13562 yiv6206190985yui_3_16_0_1_1409773050248_3793"><br id="yiv6206190985yui_3_16_0_6_1409745842588_328" class="yiv6206190985" style=""></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color: rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13564 yiv6206190985yui_3_16_0_1_1409773050248_3795">In my project, a cold tank (type 4) is used to connect between the chiller and the building, with the aid of
using type 682 to impose the load.</div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color: rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13565 yiv6206190985yui_3_16_0_1_1409773050248_3796"><span style="font-size:13.63636302948px;background-color:transparent;" id="yiv6206190985yui_3_16_0_6_1409773050248_24">Is it resulted from a mistake in the connections of the cold tank? </span><br></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color: rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13568 yiv6206190985yui_3_16_0_1_1409773050248_3799"><br></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color:
rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13568 yiv6206190985yui_3_16_0_1_1409773050248_3799">Down below are the <span style="font-size:13.63636302948px;background-color:transparent;" id="yiv6206190985yui_3_16_0_1_1409745842588_6206" class="yiv6206190985">links</span><span style="font-size:13.63636302948px;background-color:transparent;" id="yiv6206190985yui_3_16_0_1_1409745842588_6206" class="yiv6206190985">, where a&b for chiller-tank loop and c&d
for tank-load loop</span></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_4" style="color: rgb(0, 0, 0); font-size: 13.63636302948px; font-family: verdana, helvetica, sans-serif; font-style: normal; background-color: transparent;" class="yiv6206190985 yiv6206190985yui_3_16_0_1_1409745842588_13568 yiv6206190985yui_3_16_0_1_1409773050248_3802"><span class="yiv6206190985" id="yiv6206190985yui_3_16_0_6_1409745842588_164" style="font-size:13.63636302948px;background-color:transparent;">a- </span><span class="yiv6206190985" id="yiv6206190985yui_3_16_0_1_1409745842588_6276" style="font-size:10pt;background-color:transparent;">Chilled water temperature and flow rate (chiller107) ---->> Cold-side temperature and flow rate (cold tank)</span><br></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_6" class="yiv6206190985" style=""></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style=""><span
id="yiv6206190985cb3df404-ecb5-41c5-84e7-c9df5231e498" class="yiv6206190985GINGER_SOFTWARE_mark"><span id="yiv6206190985c58ec2f8-fd5f-4984-bf91-203ebb3e56b5" class="yiv6206190985GINGER_SOFTWARE_mark"><span id="58f64090-63d7-4898-9fc8-714b8c5e5cc5" ginger_software_uiphraseguid="a3135635-4030-4d6b-b255-f316a9b4e30f" class="GINGER_SOFTWARE_mark">b</span></span></span>- Temperature (and flow rate) to load (cold tank) --->> Chilled water inlet temp and flow rate (chiller) trough a constant speed pump</div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style=""><span id="yiv6206190985ce65c357-e3c2-455a-9a6b-54e7475c3d8d" class="yiv6206190985GINGER_SOFTWARE_mark" style="font-size:10pt;"><span id="yiv6206190985122dba59-0ced-4ab2-aeae-5c40a18c083a" class="yiv6206190985GINGER_SOFTWARE_mark"><span id="4308a211-2d03-4f7d-a580-7cf07c4f48b8" ginger_software_uiphraseguid="f20d83ad-c65e-4803-9521-3b18a6f9e01a"
class="GINGER_SOFTWARE_mark">c</span></span></span><span style="font-size:10pt;" id="yiv6206190985yui_3_16_0_1_1409773050248_4207">- Outlet temperature and flow rate (type 682) --->> Hot-side temperature and flow rate (cold tank)
through a pump</span><br></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style=""><span id="yiv6206190985f19ff-4912-4c19-93e5-ac007df4293e" class="yiv6206190985GINGER_SOFTWARE_mark"><span id="yiv62061909853099ac69-70a9-4936-b78a-62527f405976" class="yiv6206190985GINGER_SOFTWARE_mark"><span id="5a82e45d-6157-416e-8843-2bc577fbc0f6" ginger_software_uiphraseguid="0de4177e-2748-4de3-8679-2c51642e703e" class="GINGER_SOFTWARE_mark">d</span></span></span>- Temperature (and flow rate) to heat source (cold tank) --->> Inlet temperature and flow rate of type 682</div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style=""><span style="font-size:10pt;" id="yiv6206190985yui_3_16_0_6_1409773050248_37"><br></span></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style=""><span style="font-size:10pt;" id="yiv6206190985yui_3_16_0_6_1409745842588_406">Am I right? If yes,
a</span><span style="font-size:10pt;" id="yiv6206190985yui_3_16_0_1_1409745842588_14117">re there other reasons, such as the set
point temp of the Aux heater, that might cause this error?</span></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style=""><br></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style="">Kind regards,</div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style="">Shahen</div><div id="yiv6206190985yui_3_16_0_6_1409745842588_8" class="yiv6206190985" style=""><br></div><div id="yiv6206190985yui_3_16_0_6_1409745842588_10" class="yiv6206190985" style=""><font size="3" class="yiv6206190985" style=""></font></div></div></div></div></div></div></div></div></div></div></div></body></html>