Annexes - Experimental investigation of a reversible heat pump / organic Rankine cycle unit designed to be coupled with a passive house (Net Zero Energy Building)

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8 ANNEX

Figure 17: Picture of the reversible HP/ORC unit

Figure 18: Global relative residue (heat pump) 0 1 2 3 4 5 6 7 8 9 1 6 11 16 21 26 31 G lo b al r el at iv e res id u e [% ] test [-]

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Figure 19: Global relative residue (ORC)

Figure 20: Cross-checking of pressure sensor of the condenser (Heat pump) -0,03 -0,02 -0,01 0 0,01 0,02 0,03 0,04 0 5 10 15 20 25 30 35 40 R el at iv e res id u e [-] Test [-]

relative residue

-0,3 -0,25 -0,2 -0,15 -0,1 -0,05 0 0,05 0,1 0,15 0,2 0 0,05 0,1 0,15 0,2 p_cd_s u -p _cd _e x [b ar ] Dp_r [bar]

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Figure 21: Cross-checking of pressure sensor of the condenser (ORC)

Figure 22: Heat balance on the condenser (heat pump) 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 p_cd_s u -p _cd _e x [b ar ] Dp_r [bar]

Check of the pressure sensors

8000 9000 10000 11000 12000 13000 14000 15000 16000 17000 18000 8000 10000 12000 14000 16000 18000 Th er mal p o w er o n w at er s id e [W ]

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Figure 23: Heat balance on the condenser (ORC).

Figure 24: Evaporator heat balance (heat pump) 20000 25000 30000 35000 40000 45000 50000 55000 60000 20000 25000 30000 35000 40000 45000 50000 55000 60000 h er mal p o w er o n w at er s id e [W ]

Thermal power on refrigerant side [W]

0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 0 5000 10000 15000 20000 Th er mal p o w er o n w at er s id e [W ]

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Figure 25: Evaporator heat balance (ORC)

Figure 26: Compressor residue 25000 30000 35000 40000 45000 50000 55000 60000 65000 70000 25000 30000 35000 40000 45000 50000 55000 60000 65000 70000 Th er mal p o w er o n w at er s id e [W ]

Thermal power on refrigerant side [W]

-200 0 200 400 600 800 1000 1200 0 5 10 15 20 25 30 C o mp res so r res id u e [W ] Test [-]

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Figure 27: Expander residue

Figure 28: Oscillations of the flow due to the electronic expansion valve due to low set-point of over-heating -3000 -2500 -2000 -1500 -1000 -500 0 500 1000 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 Ex p an d er r es id u e [W ] test [-] 0 2 4 6 8 10 12 14 0 0,01 0,02 0,03 0,04 0,05 0,06 0,07 0 50 100 150 200 250 300 Ov er -hea ti ng [ °C] R ef ri ger an t fl o w [ kg /s ] Time [s] Refrigerant flow Over-heating