Advances in Civil Engineering / 2018 / Article / Tab 2

Research Article

Comparison Evaluations of VRF and RTU Systems Performance on Flexible Research Platform

Table 2

Regression models for RTU power consumption for heating season.

CategoryOperationRegression modelsR2

Building load (kWh)RTU1000.92
RTU750.90
RTU500.89
M_DOASadd (kWh)RTU100N/A
RTU75N/A
RTU50N/A
M_RTUDX+Fan (kWh)RTU1000.89
RTU750.86
RTU50 (if a < 5°C)0.34
RTU50 (if a > 5°C)0.82
M_RTUcooling (kWh)RTU1000.98
RTU750.92
RTU500.91
M_NGheating (kWh)RTU50 (if a < 4.4°C)0.07
RTU50 (if 4.4°C < a < 10°C)0.91
RTU50 (if a > 10°C)ZeroN/A

a: outdoor air temperature (°C); b: global horizontal solar radiation (W/m2); c: time of day; d: M_RTUDX + Fan.

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