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TRANSCRIPT
IEA SHC Task Meeting
Task 53
21st and 22nd of September 2015, EURAC, Bolzano, Italy
Solar PV Cooling
Lukas Omlin, Paul Gantenbein
Institute for Solar Technology SPF
University of Apllied Sciences Rapperswil
phone: +41 (0) 55 222 4166, mail: [email protected]
phone: +41 (0) 55 222 4811, mail: [email protected]
Agenda
2
Content
• System
• System States and Control
• Climatic Conditions in the Lab
• Set in operation - first measurement results
• Outlook
490 liter490 liter
Heat rejection tower
Heat pump
Cooling ceilings
Cold
Side
Hot
Side
AHU
AHU
A1
C1
C2S1 S2
P1
P2 P3
M1
Y1
Y2 Y3
F1
F2
F3
F5
T11
T12
T21
T22
T32
T31 T82
T81
T51
T52
T54
T53
T52
F6
T61
T62
T23
T24
T25
Y4
T41
T42
F4
V3
DC
AC
P
PP
Heat PumpHeat rejection tower
PV Module
P
Pumps
C3
Flow heaterT72
T71
E2 E1 E3
E4
System
3
Hydraulic schematic
2. Heat Rejection Unit 3. PV Modules and Inverter
6. Heat Pump -
Cooling machine
4. Cold Ceilings
5. Cold Storage7. Hot Storage
1. Measurement Equipment
and Data Acquisition
System
4
Main Components
PV modules (Meyer Burger) – south oriented
Cooling machine (HP; ait / Nibe) & storage tanks.
System
5
Main Components
Cold ceilings (Zehnder) installed in the Lab.
Outdoor unit
System states
6
Room Cooling Circuit
1. Start Room Cooling.
2. Stop Room Cooling.
Etc.
Cold Preparation
1. Charging the cold storage, heat recovery to preheat DWH.
2. Charging the cold storage, heat rejection to the ambient.
3. System Stop.
Etc.
Domestic Hot Water (DHW) profile
0
5
10
15
20
25
30
35
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
con
sum
pti
on
in %
/day
hour in the day (-)
hot water profile in %/day (total of 200l/day)
490 liter490 liter
Heat rejection tower
Heat pump
Cooling ceilings
Cold
Side
Hot
Side
AHU
AHU
A1
C1
C2S1 S2
P1
P2 P3
M1
Y1
Y2 Y3
F1
F2
F3
F5
T11
T12
T21
T22
T32
T31 T82
T81
T51
T52
T54
T53
T52
F6
T61
T62
T23
T24
T25
Y4
T41
T42
F4
V3
DC
AC
P
PP
Heat PumpHeat rejection tower
PV Module
ONON
P
Pumps
C3
Flow heaterT72
T71
E2 E1 E3
E4
Charge cold storage
heat rejection to the ambientCharge cold storage
heat recovery to preaheat
domestic hot water (DHW)
490 liter490 liter
Heat rejection tower
Heat pump
Cooling ceilings
Cold
Side
Hot
Side
AHU
AHU
A1
C1
C2S1 S2
P1
P2 P3
M1
Y1
Y2 Y3
F1
F2
F3
F5
T11
T12
T21
T22
T32
T31 T82
T81
T51
T52
T54
T53
T52
F6
T61
T62
T23
T24
T25
Y4
T41
T42
F4
V3
DC
AC
P
PP
Heat PumpHeat rejection tower
PV Module
P
Pumps
C3
Flow heaterT72
T71
E2 E1 E3
E4
System states
7
Stop Room Cooling (example) Room Temperature > 23°C
climatic conditions
8
Room temperature
47
47.5
48
48.5
49
49.5
50
50.5
51
29
29.2
29.4
29.6
29.8
30
30.2
30.4
30.6
30.8
31
31.2
0.00 h 4.48 h 9.36 h 14.24 h 19.12 h 0.00 h
rela
tive
air
hu
mid
ity
rh (
%)
tem
per
atu
re T
(°C
)
time t (hh:mm)
Laboratory EW 6: 20.07.2015
air temperature T (°C) relative air humidity rh (%)
46
47
48
49
50
51
52
53
25.2
25.4
25.6
25.8
26
26.2
26.4
26.6
26.8
0.00 h 4.48 h 9.36 h 14.24 h 19.12 h 0.00 h
rela
tive
air
hu
mid
ity
rh (
%)
tem
per
atu
re T
(°C
)
time t (hh:mm)
Laboratory EW 6: 05.06.2015
air temperature T (°C) relative air humidity rh (%)
Measurement results
9
0
5
10
15
20
25
30
35
40
45
50
0
500
1000
1500
2000
2500
Tem
pe
ratu
re T
[°C
]
Irra
dia
nce
G [
W/m
2],
Po
we
r P
el.[W
]
Irradiance, PV Power Output, Module Temperature 8. Sept. 2015
PV Power Output
Irradiance on Module Surface
PV Module Temperature
PV modules
Measurement results
10
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
air
hu
mid
ity
rh [
%]
Tem
pe
ratu
re T
[°C
]
Temperature Curve of the Cold Ceilings 8. Sept. 2015
Room TemperatureDew Point TemperatureTemperature Cooling Ceilings InletTemperature Cooling Ceilings OutletRoom Relative Humidity
Cold ceilings
Measurement results
11
System control
Charging cold storage
heat rejection to
the ambient
Charging cold storage
heat recovery to
preheat DHW
System StopSystem Stop
Measurement results
12
Outlook
Partners
1. Implementation of additional system operation states
- Free cooling
- Preparation of DHW in winter time
- Defrosting
2. Development of additional control strategies
3. Find out the relevant parameters for scaling up the
system