Andrea Calabrese - ENEA - IMPIANTI DI SOLAR HEATING AND COOLING: UN CONTRIBUTO POSITIVO ALLE PROBLEMATICHE ENERGETICHE ED AMBIENTALI
1. XV EUROPEAN CONFERENCE MILANO 7th-8th JUNE 2013 CSG
Latest Technology in Refrigeration and Air Conditioning
Under the Auspices of the PRESIDENCY OF THE COUNCIL OF MINISTERS
âSOLAR HEATING AND COOLING SYSTEMS:
A POSITIVE CONTRIBUTE TO ENERGY AND ENVIRONMENTAL ISSUESâ
CASE STUDY: Innovative Solar heating and cooling system with PCM tank at service of F-92 Building of
ENEA CASACCIA Research Centre (ROMA)
XV EUROPEAN CONFERENCE Milan, June 7th 2013
Scientific referents:
Ing. Nicolandrea Calabrese
Ing. Francesco DâAnnibale
Ing. Carla Menale
Ing. Paola Rovella
For info: andrea.calabrese@enea.it
www.climatizzazioneconfontirinnovabili.enea.it
2. âUse of solar and environmental heat to air conditioningâ
Consumption2
3. F-92 BUILDING FEATURES
Latitude 42°03âN
Longitude 12°18âEst
Climatic
Zone (Italy)
D
Area 381 m2 mq
CASE STUDY: Solar heating and cooling system at service of F-92 Building of ENEA CASACCIA
Research Centre (ROMA)
âUse of solar and environmental heat to air conditioningâ
https://maps.google.it/maps/ms?gl=it&ie=UTF8&oe=UTF8&msa=0&msid=103631601450429953584.00047466407d1fa933f1a
4. CASE STUDY: Innovative Solar heating and cooling system at service of F-92 building of ENEA
CASACCIA Research Centre (ROMA)
A NETWORK OF UNDERGROUND PIPING CONNECTS THE HEATING
AND REFRIGERATION STATION TO THE BUILDING
âUse of solar and environmental heat to air conditioningâ
5. Heating with SunâŠ
A) Solar heating:
WINTER TIME: room heating is realized with radiant heating system, powered with low temperature to maximize the
use of thermal solar energy.
Evacuated tubes collectors type all glass
(WINTER: 40-50°C)
(SUMMER: 80 â 110°C)
âUse of solar and environmental heat to air conditioningâ
6. Heating with the SunâŠusing radiant heating system
A) Solar heating:
The highest paviment
temperature depends on
enviroment kind:
Range Tmandata panels: 40 â 50 °C
Dtmaximum panelsâs track: 20°C
âUse of solar and environmental heat to air conditioningâ
7. Main systemâs Components:
A) Solar heating:
Evacuated tube solar collectors:
Technical Data:
-Single collector gross area = 3,75 [m2];
-Solar field gross area = 56 [m2];
-Thermal Power â 25 [kWth].
âUse of solar and environmental heat to air conditioningâ
8. A) Solar heating: SYSTEM LAYOUT, during the research activity we analyze the different energy cotributions
FE01
FE07
FE03
FE02
Solar field
Hot tank
Gas boiler
Request of Energy
from building
WINTER WORKING
IN BUILDING
THERMAL CENTRAL
âUse of solar and environmental heat to air conditioningâ
9. Winter Monitoring Data: 09 FEBRUARY â 15 APRIL 2012
A) Solar heating:
GAS BOILER
SOLAR FIELD
Energy contribution
Energy contribution of Integration Gas Boiler and Solar Field
09-29 February 2012 01-31 March 2012 01-15 April 2012
kWh Integration
Gas Boiler
kWh Useful
Solar Field
âUse of solar and environmental heat to air conditioningâ
10. Winter Monitoring Data: 09 FEBRUARY â 15 APRIL 2012
A) Solar heating:
09 FEBRUARY â 15 APRIL 2012
SOLAR FRACTION
INTEGRATION GAS BOILER: 3.628,0 kWh
SOLAR FIELD: 4.532,0 kWh
09-29 February 2012 01-31 March 2012 01-15 April 2012
Monitoring Thermal Solar Collectors
Solar radiation incident on the solar field [kWh]
Energy Produced by Solar field and used (FE01) [kWh]
Energy produced by the solar field and dissipated by Dry cooler
âUse of solar and environmental heat to air conditioningâ
Energy dissipatedâŠ
11. âUse of solar and environmental heat to air conditioningâ
At the end of our research activity about solar heating and
cooling system for WINTER season we obtained that the energy
required to heat F-92 building was provided for:
- 56 % by solar energy
- 44 % by gas boiler (methane gas)
These results were obtained ensuring COMFORT conditions into
the building.
Winter Monitoring Data: 09 FEBRUARY â 15 APRIL 2012
12. A) Solar heating: obtained indoor environmental temperature
Winter Monitoring Data: 09 FEBRUARY â 15 APRIL 2012
SET POINT
9 - 17 February 2012:
Fixed environment
setpoint
Tmin = 19°C
Tmax = 21°C
19 February - 15 April
2012:
Fixed environment
setpoint
Tmin = 18°C
Tmax = 20°C
Note: set TA01
Tmin = 14°C
Tmax = 16°C
Environment Temperatures [â°C]
9 - 17 February 2012 Working System CONTINUE
19 February 2012 - 15 April 2012: Working System DISCONTINUOUS (from 7.00 am to 17.00 pm)
âUse of solar and environmental heat to air conditioningâ
[Monitoringâs Day]
Environment Temperatures [â°C]
13. A) Solar heating: Comparision between February 2012 and February 2013
GAS BOILER
Energy contribution
9 - 17 February 2012 Working System CONTINUE
19 February 2012 â 29 February 2012: Working System
DISCONTINUOUS (from 7.00 am to 17.00 pm)
February 2012 February 2013
1975 kWh
(46,5%)
2275 kWh
(53,5%)
Energy contribution
01-28 February 2013 : Working System DISCONTINUOUS
(from 7.00 am to 17.00 pm)
GAS BOILER
SOLAR FIELDSOLAR FIELD
10 - 12 February 2013:
Solar collectors NOT
covered by snow
10 - 12 February 2012:
Solar collectors covered
by snow
âUse of solar and environmental heat to air conditioningâ
SOLAR
FRACTION
14. Winter Monitoring Data: 09 FEBRUARY â 15 APRIL 2012
A) Solar heating:
There is Dissipated
EnergyâŠ.BUT INTEGRATION
GAS BOILER IS USED!!
It would be necessary an
accumulation tank for thermal
energy, DURING WINTER
PERIOD, with a bigger
capacity (experimental
analisys 2012 year with
sensible Accumulation tank of
C=1.500 liters)
NEW GENERATION
ACCUMULATION SYSTEM:
PCM
âUse of solar and environmental heat to air conditioningâ
15. PCM (Phase Change Material) Accumulation tank to reduce dissipated energy:
Sensible water accumulation of 3500 l
kJ730005187.43500
outinlwatersens TTcmE
kJ69000533130
,tubeslattubeslat cNE
Latent PCM Accumulation
(PCM S46 TubeICE) of 1000 l
HYDRATED SALTS OF
S89-S7 SERIES placed
in sealed tubes
Cold Water
Hot Water
Solar Field
Control
Unit
Gas
BoilerHot
Water
Tank
âUse of solar and environmental heat to air conditioningâ
16. PCM (Phase Change Material) Accumulation tank
âUse of solar and environmental heat to air conditioningâ
UNIVERSITAâ DI PADOVA
Dipartimento di Tecnica e
Gestione
dei sistemi industriali
17. PCM (Phase Change Material) Accumulation tank to reduce dissipated energy:
CHARGE PHASE DISCHARGE PHASE
Sensible
Sensible
Sensible
Latent
Temperature of
the phase change
Sensible
Sensible
Sensible
Latent
Temperature of
the phase change
âUse of solar and environmental heat to air conditioningâ
18. TRADITIONAL TANK
âUse of solar and environmental heat to air conditioningâ
TE07
TE08
TE07
TE08
C = 1500 litres C = 1000 litres
PCM TANK
Comparison Traditional Tank (ONLY WATER) - PCM Tank (HYDRATED SALTS)
19. Comparison Traditional Tank C=1500 litres - PCM Tank C=1000 litres
âUse of solar and environmental heat to air conditioningâ
Days of April 2012 and Aprile 2013 (more comparable than days of March because days of April 2012 and days of
April 2013 have medium temperatures more similar than March 2012 and March 2013) have an index FE07/GG
more similar than those of March, respectively 19 kWh/GG and 24 kWh/GG.
If we considere tank contribute to Fâ92 building heating (TANK_TO_LOAD) we obtain a higher value for 2013 equal
to 16 kWh / GG compared to 13 kWh / GG of 2012.
The contribution of the accumulation to the needs of the building (TANK_TO_LOAD/FE07) was the same: 69% for
2012 and 68% for 2013 (SAME SOLAR FRACTION).
The percentage of utilization of solar energy (TANK_TO_LOAD/FE02) with PCM accumulation amounted to 76%
compared with 64% of the accumulation standard.
where:
âą n: days number of the conventional heating period
âą T0: environment conventional temperature
âą Te: medium extenal daily temperature
APRILE 2012 APRILE 2013
TEMPERATURA MEDIA
PERIODO
13.3 14.3 [°C]
VOLUME ACCUMULO 1500 900 [l]
TEMPERATURA INTERNA
EDIFICIO
20.0 22.0 [°C]
GG] FE07/GG 19 24 [kWh/GG]
GG] TANK_TO_LOAD/GG 13 16 [kWh/GG]
] FE07 1 070 1 556 [kWh]
] FE03 331 503 [kWh]
] FE02 1 159 1 394 [kWh]
] TANK_TO_LOAD 739 1 053 [kWh]
SOLAR FRACTION 69% 68% %
APRIL 2012
TANK VOLUME
INTERNAL BUILDING
TEMPERATURE
APRIL 2013
21. âUse of solar and environmental heat to air conditioningâ
Experimental test of a single PCM Vessel (HYDRATED SALTS)
PCM vessel:
De = 50 mm
L = 1000 mm
HYDRATED SALTS
22. PCM Test Report: EXPERIMENTAL RIG
âUse of solar and environmental heat to air conditioningâ
23. PCM Test Report: EXPERIMENTAL RIG
âUse of solar and environmental heat to air conditioningâ
Typical test conditions:
âą Water velocity in the anulus: 0.2 to 0.4 m/s
⹠Inlet temperature Ti : 20 to 85 °C
âą Pressure P: 1.0 to 1.3 bar
⹠Temperature ramp gradient: 5 to 600 °C/h
Geometry equivalent to a
subchannel in the real vessel
PCM vessel:
De = 50 mm
L = 1000 mm
Test section:
Di = 60 mm
L = 1000 mm
24. FAST TEMPERATURE RAMP (10â°C/min)
âUse of solar and environmental heat to air conditioningâ
No visible effect on the output
temperature gradient around
the melting temperature
T=46°C
The melting energy is
absorbed and released in
hours and its effect can not be
distinguished from the
thermal capacity of the single
phase material
SLOW TEMPERATURE RAMP (10â°C/h)
PCM Test Report: EXPERIMENTAL RESULTS
25. PCM: IMPROVEMENTS
âUse of solar and environmental heat to air conditioningâ
INCREASE OF PCM CONDUCTIVITY WITH HIGH CONDUCTIVITY FOAMS:
CERAMICS, METALS OR GRAPHITE
AISI 316 SiC (Silicon Carbide)
26. Solar cooling System with Absorption Chiller
B) Solar cooling:
Vacuum Solar
Collector
250 m2
Cold Water
Accumulation
tank 15.000 l
Cold
Water
100 kW
Hot Water
150 kW
CHILLER
SOLAR COOLING system with integration gas boiler and accumulation system for hot and cold water. Idraulic scheme (doc. SYSTEMA S.p.A)
SUMMER PERIOD: coincidence between cool energy request peak and period of maximum availability of solar
energy.
âUse of solar and environmental heat to air conditioningâ
27. âUse of solar and environmental heat to air conditioningâ
Solar cooling System with Absorption Chiller
B) Solar cooling:
29. Main system Components:
B) Solar cooling:
Absorption Chiller
(water â lithium bromide):
Technical Data:
- Cooling Power =18 [kWf];
- Heating Power in =25 [kWt];
Accumulation tank for
cold water:
Technical Data:
- volume 1000 [ L];
Evaporative Tower:
Technical Data:
-Potentiality = 43 [kW]
(Tbu=25,6[°C]; TH2O in=35[°C];
TH2O out=30 [°C]);
-Air Flow = 7.500,0 [m3/h];
-Water Flow = 7.400,0 [l/h]
âUse of solar and environmental heat to air conditioningâ
30. Electric Power Absorbed: 48 [W]
Temperature [°C]
T Heat Medium Inlet 88
T Heat Medium Outlet 83
Chilled Water Inlet 12,5
Chilled Water Outlet 7
Cooling Water Inlet 31
Cooling Water Outlet 35
http://www.yazaki-airconditioning.com/fileadmin/templates/img_airconditioning/swf/080925_chiller_absorption_ani.html
B) Solar cooling:
Layout of Absorption chiller water-lithium bromide
âUse of solar and environmental heat to air conditioningâ
31. B) Solar cooling:
SYSTEM LAYOUT: during the research activity we analyze the different energy contributions
FE01
FE07
FE03
FE02
FE04 FE05
FE06
Required building
Cold rated output
Heat rate input
SUMMER WORKING
Water/Lithium-bromide Chiller
âUse of solar and environmental heat to air conditioningâ
32. B) Solar cooling:
Summer Monitoring Data: 01 June - 15 September 2012
01 JUNE 2012 - 15 SEPTEMBER 2012: Working System DISCONTINUOUS (from 9.00 am to 19.00 pm)
GAS BOILER
SOLAR FIELD
Energy contribution
Energy Contributution of Integration Gas Boiler and Solar Field
01-30 June 2012
kWh Integration Gas Boiler
kWh Useful Solar Field
01-31 July 2012 01-31 August 2012 01-15 September 2012
âUse of solar and environmental heat to air conditioningâ
33. B) Solar cooling:
Summer Monitoring Data: 01 June - 15 September 2012
01-30 June 2012
Monitoring Thermal Solar Collectors
01 JUNE â 15 SEPTEMBER 2012
SOLAR FRACTION
INTEGRATION GAS BOILER: 4.657,0 kWh
SOLAR FIELD: 8.909,0 kWh
Solar radiation incident on the solar field [kWh]
Energy Produced by Solar field and used (FE01) [kWh]
Energy produced by the solar field and dissipated by Dry cooler
01-31 July 2012 01-15 September 201201-31 August 2012
âUse of solar and environmental heat to air conditioningâ
34. âUse of solar and environmental heat to air conditioningâ
At the end of our research activity about solar heating and cooling
system for SUMMER season we obtained that the thermal energy
required by CHILLER to conditionig F-92 building was provided for:
- 66 % by solar energy
- 34 % by gas boiler (methane gas)
These results were obtained ensuring COMFORT conditions into the
building.
Summer Monitoring Data: 01 JUNE â 15 SEPTEMBER 2012
35. B) Solar cooling: obtained indoor environmental temperature
Summer Monitoring Data: 01 June - 15 September 2012
SET POINT
01 June - 15
September 2012:
Fixed
environment
setpoint
Tmin = 22°C e
Tmax = 24°C
Note: TA01
no controlled
01 JUNE 2012 - 15
SEPTEMBER 2012:
Working System
DISCONTINUOUS
(from 9.00 am to
19.00 pm)
T external medium
(09:00 â 19:00)
03/09/2012: 24°C
04/09/2012: 19°C
05/09/2012: 24°C
06/09/2012: 28°C
07/09/2012: 29°C
08/09/2012: 29°C
09/09/2012: 28°C
10/09/2012: 28°C
T external medium
(09:00 â 19:00)
21/07/2012: 31°C
22/07/2012: 29°C
23/07/2012: 25°C
24/07/2012: 27°C
25/07/2012: 30°C
26/07/2012: 32°C
STOP OF SYSTEM
FOR
MAINTENANCE:
21/08/2012
22/08/2012
23/08/2012
26/08/2012
Environment Temperatures [â°C]
[Monitoringâs Day]
âUse of solar and environmental heat to air conditioningâ
36. CONTROL AND MANAGEMENT SYSTEM: BX EINSTEIN
Operative Data and
weather conditions
Management, Control and
Back up PC
Servo motors electric valves
regulation Variable flow pumps
Energy counters
âUse of solar and environmental heat to air conditioningâ
37. HIGHLIGHTS OF PRESENTED CASE STUDY
âUse of solar and environmental heat to air conditioningâ
ONE OF THE FIVE
BETTER CASE STUDY
38. âUse of solar and environmental heat to air conditioningâ
WITHOUT BONUS
Solar heating and cooling: PAYBACK PERIOD
PAYBACK PERIOD RELATIVE DIFFERENT PLACES AND SYSTEM POWER
39. âUse of solar and environmental heat to air conditioningâ
WITH BONUS
INTRODUCED BY
D.M. del 28/12/2012
Solar heating and cooling: PAYBACK PERIOD
PAYBACK PERIOD RELATIVE DIFFERENT PLACES AND SYSTEM POWER
40. Our research and development activities:
Thanks for your attention
âUse of solar and environmental heat to air conditioningâ