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Table 4.11 Sensor Temperature Pt1000 Temperature TC Type T (Cu/K) Absolute pressure Druck Absolute pressure Druck Pressure difference Rosemount CO2 mass flow meter Rheonic Volume flow meter Kundo Volume flow meter Bucket, stop watch W attmeter Norma Range -20 to 140oC -20 to 140oC 2to 6MPa 0 to 16 MPa 10 to 150 kPa 0.5 to 2.0 kg/min 5 to 30 l/min 0.2 to 2 l/min 500 to 2500 W Relative Uncertainty * * ±0.2%FS ± 0.2% FS ± 0.09% FS ± 0.3% MV ± 0.5% MV ± 1% MV ± 1% FS Absolute Uncertainty ± 0.085oC ± 0.5oC1 ± 0.5oC1 ±12kPa ± 32 kPa ± 135 Pa ± 0.0015 – 0.006 kg/min ± 0.025 – 0.15 l/min ± 0.002 – 0.02 l/min ± 25 W 4 – Test Rig Design and Experimental Methods Relative and absolute uncertainties of the sensors/instru- ments for the prototype CO2 heat pump unit. FS=full scale, MV=measured value (ref. Section 4.1.4.1 to 4.1.4.4). 1) Estimated uncertainty in the CO2 temperature measurement, when taking into account that the sensor measured the tube wall temperature and not the CO2 bulk temperature. 4.1.4.6 Uncertainty of the Computed Values The uncertainty of the computed values was calculated on the basis of the individual uncertainties propagation analysis, i.e. a root-sum-square com- bination of the effects of individual measurements. The principles of the uncertainty analysis are presented in Appendix D, Uncertainty Analysis of the Measurements for the Prototype CO2 Heat Pump. Tables 4.12 to 4.16 show the calculated absolute uncertainty of the evapo- ration temperature as well as the relative uncertainty of the gas cooler heating capacity and the COP of the CO2 heat pump unit. The uncer- tainties for the heating capacity and the COP are based on measurements from both the water circuits and the CO2 circuit. Details regarding the calculations are presented in Appendix D. 93PDF Image | Residential CO2 Heat Pump System for Combined
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
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