IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date: November 2010
All in all seven heat flow meters and seven electricity meters are installed. The Kipp & Zonen
SPlite pyranometer is used to measure solar radiation. The data points for monitoring only
are logged separately. The two control units (Technische Alternative TA UVR1611) provide
further information (temperatures, pump status,…), which is necessary for a detailed analysis
of the plant.
The data is collected by two IQ3 controllers. These controllers are Building Management
System controllers, which use Ethernet and TCP/IP networking technologies. Each controller
incorporates a web server, which can deliver user-specific web pages to a PC or mobile
device running internet browser software. If a system is set up with the correct connections, a
user with the appropriate security codes can monitor or adjust the controller from any Internet
access point. In the first cooling season (2009) the operator station was located externally at
the office of the chiller manufacturer.
Due to a combination of monitoring problems during summer 2009 not enough valuable and
comparable monthly data could be collected, but still some useful system operation
experiences were made.
An overview of all monitored data points is given in Table 1.
Table 1: Monitoring data points in Gröbming
Quantity No. Type Accuracy
monitoring (IQ3) / control inputs (TA UVR1611)
temperature (UVR1611) 18 KTY 81-210 ± 1% (25°C)
radiation 1 SP-Lite / Kipp&Zonen
temp. Dependence +0.15%/°C
directional error ±5% at 80°
temp./relative humidity 1 ±0.5% °C / ±3%RH
heat meter
energy/volume/power/flow
rate/return-supply-temp./∆T 7 (x7) Kamstrup Multical 601
E C = ±(0,15 +2/∆Θ)%
E T = ±(0,4 +4/∆Θ)%
electricity meter
energy/power 7 (x2) Kamstrup 162B Class A
logged control outputs (TA UVR1611)
Speed control 2
on/off 7
valve position automatic 10
valve position hand 2
….
sum 148
4.2 Period of Measurement
The data logging of the control units (TA UVR1611) was started in January 2010.
The first monitoring equipment was installed and commissioned within the construction of the
cooling plant in 2007. These measurements were mainly completed to observe the chiller
performance. A detailed energy balance of the absorption chiller could be calculated.
The monitoring equipment for level III measurements was completed in July 2009. With this
equipment only energy balances can be calculated. For a detailed analysis additional data
logging of the control units was implemented in January 2010.
Due to problems in data logging (connection to operator, constant time intervals in
logging,...), the operator station was moved to the plant. Now it’s located in the utility room
and it’s logging the data from the monitoring and control devices.
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