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CONSOLFOOD2020
PHOTOVOLTAIC SOLAR COOKER WITH NO
BATTERIES USING ADVANCED ELECTRONICS
• Antonio Lecuona Neumann ([email protected] )
• Ernesto García Ares (Oficina Técnica)
• Ana Marta Lallana Peña (Master student)
Grupo ITEA, Universidad Carlos III de Madrid
Leganés; España
Third International Conference CONSOLFOOD2020
Advances in Solar Thermal Food Processing
22-23-24 January 2020
INSTITUTE OF ENGINEERING; UNIVERSITY OF ALGARVE; CAMPUS DA PENHA; FARO-PORTUGAL
CONSOLFOOD2020
INTRODUCTION
DESIGN AND IMPLEMENTATION
TESTING CAMPAIGN
CONCLUSIONS
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
INTRODUCTION
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CO2
CO
NOx
SOx
Solar cooking:
• No pollution
• No deforestation
But:
• Outdoor cooking is not ideal
• Electrification is coming!
Why PV?
CONSOLFOOD2020
INTRODUCTION
DESIGN AND IMPLEMENTATION
TESTING CAMPAIGN
CONCLUSSIONS
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
Design Main issues
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
PV panels offer:
• Possibility of transferring electricity to an indoor kitchen.
• Lower efficiency than “thermal” cookers ~15% → high efficiency electric cooker.
PV panels need:
• A controller for power maximization.
• Batteries for the functioning of the commercial controllers (expensive and polluting)
Design:
• A controller circuit of high efficiency, low cost, and simple.
• A modified commercial electronic cooking utensil
CONSOLFOOD2020
Implementation Installation: parts
Source of electric
power needed for
operation.
Obtains as much
energy as possible
from the PV panel
without damaging.
• Cooks food
• Thermal insulation
• Testing with water
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
Implementation PV panel with structure
24V 300 W 2 m2 PV panel
Aluminum Structure
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
MPPT
CONSOLFOOD2020
Implementation Control circuit
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
R
R
Control circuit
CONSOLFOOD2020
Implementation Control circuit
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
Implementation Cooking pot
Heating plate
Electronic cooking utensil
Insulation perspective view
Elevation & plan bottom view
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
Implementation Cooking pot
Heating plate
Pot
Insulation
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
Modified electronic
cooking utensil without
lower and lateral skins
CONSOLFOOD2020
Implementation Cooking pot
Heating plate
Insulation
Pot
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
Implementation Cost estimate
THEORICAL ESTIMATE REAL ESTIMATE
432,69 € 300 €
↓ 25% or almost 100€ !!
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
INTRODUCTION
DESIGN AND IMPLEMENTATION
TESTING CAMPAIGN
CONCLUSSIONS
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
TESTING CAMPAIGN Theoretical modeling
Known temperature
Calculated temperature
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
TESTING CAMPAIGN Theoretical calculations
1. Initial data and hypothesis
2. Areas and R_cond
3. Antoine’s Correlation: Tsat in Madrid?
4. R_water_conv Free convection: vertical cavities
Phase change: nucleated boiling
6. R_air_conv_Pot
7. Heat balance in the inferior part
8. R_conv_infinite Free convection: Churchill and Chu
Forced convection: Hilpert
9. T_aluminum_int: energy balance
10. R_air_conv_conf: free convection in confined volumen with ↓ (H/L)
Energy balance: RETAINED
heat
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
TESTING CAMPAIGN Theoretical behavior
phase change
Period (boiling)
tem
pe
ratu
re
cooling period
Heating
period
time
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
4 type K thermocouples implemented:
Pot base, water, lid, and pot lateral
CONSOLFOOD2020
TESTING CAMPAIGN
FIELD TESTS
HEATING PLATE
FEBRUARY 4th
APRIL 2nd
COOKING POT MAY 31st
COMPLETE INSTALLATION
MAY 22nd
JUNE 10th
JUNE 12th
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
TESTING CAMPAIGN
FEBRUARY 4th
APRIL 2nd
MAY 22nd
MAY 31st
JUNE 10th
JUNE 12th
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
Overheating protection
CONSOLFOOD2020
TESTING CAMPAIGN
FEBRUARY 4th
APRIL 2nd
MAY 22nd
MAY 31st
JUNE 10th
JUNE 12th
MEASURES 14:27 VALUE
T_multimeter 1,215V
I_PVpanel 6,05A
I_Sun 425W/m2
T_PVpanel 34,3ºC
T_ambient 26ºC
V_wind 0,8 m/s
MEASURES 12:25 VALUE
T_multimeter 1,204 V
I_PVpanel 7,51A
I_Sun 1058W/m2
T_PVpanel 48,6ºC
T_ambient 26,1ºC
V_wind 0,8 m/s
0
20
40
60
80
100
120 11:2
5
11:5
9
12:3
3
13:0
7
13:4
1
14:1
5
14:4
9
15:2
3
15:5
7
16:3
1
17:0
5
17:3
9
18:1
3
18:4
7
19:2
1
19:5
5
20:2
9
21:0
3
21:3
7
22:1
1
22:4
5
23:1
9
23:5
3
0:2
7
1:0
1
1:3
5
2:0
9
2:4
3
3:1
7
3:5
1
4:2
5
4:5
9
5:3
3
6:0
7
6:4
1
7:1
5
7:4
9
8:2
3
8:5
7
9:3
1
10:0
5
Trial JUNE 10th
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
Heating and cooling testing, 2 l water
Sunset Sunrise Noon Midnight
CONSOLFOOD2020
TESTING CAMPAIGN
FEBRUARY 4th
APRIL 2nd
MAY 22nd
MAY 31st
JUNE 10th
JUNE 12th
0
20
40
60
80
100
120
11:2
5
11:3
2
11:3
9
11:4
6
11:5
3
12:0
0
12:0
7
12:1
4
12:2
1
12:2
8
12:3
5
12:4
2
12:4
9
12:5
6
13:0
3
13:1
0
13:1
7
13:2
4
13:3
1
13:3
8
13:4
5
13:5
2
13:5
9
14:0
6
14:1
3
14:2
0
14:2
7
14:3
4
14:4
1
14:4
8
14:5
5
15:0
2
15:0
9
15:1
6
15:2
3
15:3
0
15:3
7
15:4
4
15:5
1
15:5
8
16:0
5
16:1
2
16:1
9
16:2
6
16:3
3
Trial JUNE 12th
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
Cooking test:
Egg and 30×1 cm3 potato
CONSOLFOOD2020
INTRODUCTION
DESIGN AND IMPLEMENTATION
TESTING CAMPAIGN
CONCLUSIONS
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
CONCLUSIONS
• Electronic utensil modified for high efficiency PV cooking.
• Low temperature cooking is possible (tender boiling).
• Low cost ~ 300 € off-the shelf in Madrid.
• Robust design.
• Inner heat dissipation allows high efficiency.
• Insulation optimizes heat retention.
• Theoretical calculations and experimental validation.
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
CONSOLFOOD2020
Further work
• Pre-commercial prototype development
• Laboratory testing under realistic conditions (day and year-round)
• Testing at field conditions, user experience
• Low temperature cooking experience by users
• Electrification user experience
• Possible “commercialization”
PHOTOVOLTAIC SOLAR COOKER WITH NO BATTERIES USING ADVANCED ELECTRONICS
Thanks!