Table 5 Instrumentation and sensor data

T1

Hot water inlet temperature T_HW,i

1: 0…200 °C; 2: Pt100; 3: 4…20 mA;

4: acc. to DIN EN 60751, class B

T2

Hot water outlet temperature T_HW,o

1: 0…200 °C; 2: Pt100; 3: 4…20 mA;

4: acc. to DIN EN 60751, class B

V1

Volumetric hot water flow rate \(\dot{V}\)_HW

1: 0…160 m³/h; 2: electromagnetic;

3: 4…20 mA; 4: ± 0.2% of MV + 1 mm/s

T3

Cooling water inlet temperature T_CW,i

1: 0…100 °C; 2: Pt100; 3: 4…20 mA;

4: acc. to DIN EN 60751, class B

T4

Cooling water outlet temperature T_CW,o

1: 0…100 °C; 2: Pt100; 3: 4…20 mA;

4: acc. to DIN EN 60751, class B

V2

Volumetric hot cooling flow rate \(\dot{V}\)_KW

calculated value from cooling water pump speed due to problems with MID-measurement

Superheating of the working fluid vapor ΔT_SH

calculated based on measured data for T_ev,o and p_ev using thermophysical properties with NIST database

T5

Condensation temperature T_Cd

1: 0…150 °C; 2: Pt100; 3: 4…20 mA;

4: acc. to DIN EN 60751, class B

T6

Liquid temperature recuperator outlet T_Rec,o,l

1: 0…150 °C; 2: Pt100; 3: 4…20 mA;

4: acc. to DIN EN 60751, class B

T7

Outlet temperature evaporator T_ev,o

1: 0…150 °C; 2: Pt100; 3: 4…20 mA;

4: acc. to DIN EN 60751, class B

p1

Evaporator pressure p_ev

1: 0…20 bar_a; 2: 4…20 mA; 3: ceramic sensor;

4: 0.5% of NV

V3

Volumetric working fluid flow rate \(\dot{V}\)_WF

1: 0…150 L/min; 2: ultrasonic; 3: 4…20 mA

4: ± 0.3% of MV

P1

Gross power P_el,G

1: −10…600 kW; 2: power meter; 3: 4..20 mA;

4: ± (0.5% of NV + 1 digit)