IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date: November 2010
An overview of all monitored data points is given in Table 1. The controlling and monitoring
issues are done by three programmable logic controllers. Overall 111 points are logged on a
local PC. The access to this data store is provided by internet and a remote control system.
Table 1: Data points of the CoolCabin
Quantity No. Type Accuracy
monitoring / control inputs
temperature 35 PT1000 class B + calibration
pressure 4
huba control, OEM
relativ-
Drucktransmitter
endvalue ±1.5% FS
temp. dependence ±1.5%/10°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)
electricity meter
(energy/power)
4 (x7)
6 (x2)
logged control outputs
speed control 2
on/off 3
valve position 5
failure signal / set temp. / …
sum 111
Landis + Gyr, UH50,
ultraschall class II; 2+0.02 q p /q% (max 5%)
Görlitz DCi
230V/400V, 65A class I; IEC 62053-21 (±1%)
3.2 Period of Measurement
The monitoring system of the CoolCabin is in operation since the commissioning in
September 2008. Additional monitoring equipment for level III was completed in June 2009.
Monitoring is ongoing.
The patency of data logging (Fehler! Verweisquelle konnte nicht gefunden werden.) is
very high (>96%). Nameable gaps crop up only when the CoolCabin is out of service. One
problem occurred was a roof avalanche that got down on the radiation sensor. Consequently
no solar radiation data was monitored from Jan10 to April10. The missing data was
calculated out of Q1 using a monthly efficiency of the solar collectors including the heat
exchanger.
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