Solar PV Cooling set in operation and system measurements on going work
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1 IEA SHC Task Meeting Task th till 13 th of April 2016, ATECYR, Madrid, Spain Solar PV Cooling set in operation and system measurements on going work Lukas Omlin, Paul Gantenbein Institute for Solar Technology SPF University of Applied Sciences Rapperswil
2 Agenda Content System Set in operation - first measurement results (active cooling, free-cooling) System States and Control - measurement results (domestic hot water preparation) Conclusion and Outlook 2
3 System Hydraulic schematic apparatus, tubes (sensors & DAQ) 1. Measurement Equipment and Data Acquisition 2. Heat Rejection Unit 3. PV Modules and Inverter T61 F6 Heat rejection tower DC E4 P AC PV Module C1 T62 4. Cold Ceilings T11 E2 P E1 P E3 P Heat rejection tower Heat Pump Pumps Cooling ceilings AHU F1 T21 T72 T52 Flow heater T liter T24 T23 Y1 T31 P2 Heat pump Cold Side Hot Side P3 Y2 T82 Y3 T41 T liter T53 T54 F5 T51 V3 C3 A1 T12 AHU P1 M1 T22 F2 S1 Y4 T71 5. Cold Storage F3 T32 C2 T81 6. Heat Pump - Cooling machine F4 S2 T42 7. Hot Storage 3
4 System Main Components Cooling machine (HP; ait / Nibe) & storage tanks. PV modules (Meyer Burger) south oriented 4
5 System Main Components Cold ceilings (Zehnder) installed in the Laboratory (52.5m 2 ). Outdoor unit 5
6 System Main Components Component Manufacturer / Distributor Type Description PV Modules MEYER BURGER AG Sky modules (285 W p nominal power) orientation: α = 8 West, inclination: β = 15 Inverter SMA TL kw nominal power Heat Pump Nibe F brine / water heat pump (7 kw cooling power) Cold Storage alpha innotec TPSK l storage Hot Storage alpha innotec SWWS l immersed heat exchanger Outdoor Unit WT AG - brine - air heat exchanger (outdoor unit) Cold Ceilings Zehnder Group Schweiz AG Zip2 25 elements (dimension: 3 m x m) Heat Transfer Fluid Abderhalden Harapol AG Minoltherm Antifreeze heat transfer fluid based on water with 20 wt.% ethanol Meteo Station SMA SMA Meteo Station irradiance, outdoor ambient temperature, PV module temperature 6
7 System states «active cooling» Charging the cold storage and heat rejection to the ambient T61 Heat rejection tower F6 DC AC E4 P PV Module C1 ON T62 T11 E2 P E1 P E3 P Heat rejection tower Heat Pump Pumps Cooling ceilings AHU F1 T21 T72 T52 Flow heater T liter T24 T23 Y1 T31 P2 Heat Pump ON Heat pump Cold Side Hot Side P3 Y2 T82 Y3 T41 T liter T53 T54 T51 F5 V3 C3 AHU T22 F2 S1 Y4 T71 F3 T32 C2 T81 T42 F4 S2 A1 T12 P1 M1 7
8 «active cooling» measurement results Active cooling and heat rejection to the ambient 8
9 «active cooling» measurement results Active cooling and heat rejection to the ambient Dt=25min DT=5 C 9
10 System state «free-cooling» Charging the cold storage tank, outside ambient air as heat sink T61 Heat rejection tower F6 DC AC E4 P PV Module C1 ON T62 T11 E2 P E1 P E3 P Heat rejection tower Heat Pump Pumps Cooling ceilings AHU F1 T21 T72 T52 T liter T24 T23 Y1 T31 ON P2 Heat pump Cold Side Hot Side P3 Y2 T82 Y3 T41 T liter T53 T54 T51 F5 V1 AHU T22 F2 S1 Y4 T71 F3 T32 C2 T81 T42 F4 S2 A1 T12 P1 M1 10
11 «free-cooling» measurement results Cold preparation with free-cooling 11
12 «free-cooling» measurement results Cold preparation with free-cooling Dt=35min DT=3.4 C DT<1 C 12
13 System states «domestic hot water preparation» Charging the hot water storage tank, outside ambient air as heat source T61 at 12:00 o clock Heat rejection tower F6 DC AC E4 P PV Module C1 ON T62 T11 E2 P E1 P E3 P Heat rejection tower Heat Pump Pumps Cooling ceilings AHU F1 T21 T72 T52 T liter T24 T23 Y1 T31 P2 Heat Pump ON Heat pump Cold Side Hot Side P3 Y2 T82 Y3 T41 T liter T53 T54 T51 F5 V1 AHU T22 S1 F2 Y4 T71 F3 T32 C2 T81 T42 F4 S2 A1 T12 P1 M1 T hot_storage middle T-sensor < 25 C 13
14 System states «domestic hot water preparation» Stop Domestic Hot Water preparation. Heat rejection tower T61 C1 T62 F6 T11 Charge cold storage heat rejection DC E4 to the ambient P Charge AC cold storage PV Module heat recovery to preaheat domestic hot water (DHW) E2 P E1 P E3 P Heat rejection tower Heat Pump Pumps Cooling ceilings AHU F1 T21 T72 T52 Flow heater T liter T24 T23 Y1 T31 P2 Heat pump Cold Side Hot Side P3 Y2 T82 Y3 T41 T liter T53 T54 T51 F5 V3 C3 AHU T22 F2 S1 Y4 T71 F3 T32 C2 T81 T42 F4 S2 A1 T12 P1 M1 T hot_storage upper T-sensor > 50 C 14
15 «domestic hot water preparation» measurement results Produced PV Power and the electrical energy consumption of the system 15
16 «domestic hot water preparation» measurement results Heat pump power during the heating season (winter time) 16
17 «domestic hot water preparation» measurement results Domestic hot water consumption 17
18 Conclusion and Outlook Summary and Outlook 1. Further test and measurements 2. Development of additional control strategies 3. Simulation and validation of the system in Polysun 4. Find the relevant parameters for scaling up the system to higher power Partners 18
19 CombiVolt I Impulse increasing PV production first «smart heat pumps» on market, advertised to both optimize selfconsumption of PV electricity and to deliver grid services to electricity utilities but: how is their performance? Project aims analysis of the influence of intelligent control for heat pumps on PV-selfconsumption and on grid-stability comparison of electrical and thermal storage consideration of different electricity tariff models (current and future scenarios) 19
20 CombiVolt II Procedure whole system testing in the lab of 4 different systems simulation (e.g. extrapolation of measured system data, variation of climate data, load or tariff models, comparison realized vs. possible potential, electrical vs. thermal storage) Project partners Energie Zukunft Schweiz (think-tank of 7 electricity utilities) + 3 more public electricity utilities 4 heat pump and system manufacturers Contact Evelyn Bamberger (evelyn.bamberger@spf.ch) Institute for Solar Technology SPF University of Applied Sciences Rapperswil geothermal probes heat pump DHW measured simulated / emulated heat distribution TES household electricity controller charge controller inverter battery 20
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