The subject is raised here to deal with some strictly technical and economic issues for future buyers, who today are lost in well-known artistic blurs.
I have already submitted an article on the more "self-consumption" orientation of the photovoltaic application. Many have commented and participated in deepening this subject. This time I would like to go into more detail in the really concrete and mathematical applications, namely how to improve the profitability of a power plant (PV), at the scale of a house or the needs of a family.
The idea is to present here a concrete example of a combined installation, with the best possible return / price ratio, because depreciation is the key point, from the portfolio point of view, if we consider that reducing its energy bill is one of the primary goals of this solar approach.
The consumption is certainly not limited to photovoltaics alone. Many technical fields such as solar thermal heating enable a form of self-production or consumption. It is the synergy of several systems that effectively achieves a greater energy independence. Even if it is not total and absolute, it is always better than nothing in terms of independent production.
So yes or no, can a photovoltaic system quickly become profitable?
There are indeed practical solutions to hope for a higher economy than that targeted by a photovoltaic plant, by coupling it to other technologies or devices, such as smart boxes redistributing overproduction to household appliances.
This is to demonstrate that we can leverage energy conservation developed by the immediate production of a central, connecting a thermodynamic system itself distributor of heat during production hours.
Here is an example:
- How to leverage energy conservation developed by the production, by connecting a thermodynamic system itself heat distributor?
In theory, photovoltaic power 1500W can only produce at 2100 2200 annual kWh on an average of 1500 hours of sunshine.
But in practice, taking advantage of solar power 1500W in real time, you can enjoy 7000 kWh of energy consumption.
explanation:
Study conducted on a house consuming 13300 kWh. (Annual invoice € 1530)
The greediest posts of the house, whose consumption is virtually incompressible are:
Post-intensive
Equipment / Numbers / annual consumption in kWh
250W fridge / 1 / 730
800W American fridge / 1 / 2300
Freezer 350W / 1 / 1000
Cumulus / 1 / 4380
washer / 1 / 450
Dishwasher / 1 / 910
TOTAL 9770
Household appliances operating continuously:
-Frigos, Freezers, cumulus 8 to 10h / day.
Household appliances with high consumption, often running or every day:
-Washing Machine and dishwasher (table only calculates their consumption needed to heat water), and air conditioning.
annual kWh difficult diminuable: 9770 kWh on 13300kWh
_______________________________________________________________________
recommended energy installation:
- 6 PV array of 250W photovoltaic modules each = 1500W of power.
- One heat pump 300L (400W Power) connected to the hot water in the house.
+ Box mixer hot water distribution the ball to the washing machine and dishwasher.
Suggested Applications:
- The PV Central 1500W product (south of France) 2100 kWh / year for a calculation of production 1500 h (average sunshine).
Count on this one economy to 13300 kWh of annual needs, would be insufficient report.
Now, installing a thermodynamic balloon electric 300L, operating during daylight hours, we just save the 4380 kWh annual consumption TOTALS (minimum for a family of 4 people) Its power 400W being largely fueled by 1500W PV panels. 4h30 Heating time ...
Recall that one heat pump uses the ambient air calories to heat the water without use of dry strength, with a simple-to-heat pump integrated in separate piece or group ..
Raccordons now the washing machine and dishwasher, with the mixer housing, powering these machines in hot water produced by the thermo tank. these devices will not have to use their dry resistance to heat water, being supplied directly by the ball.
In 8 h of sunshine, you have time to heat 300L of sanitary water accumulated in the Thermo Ball (4h30 on average), to turn your washing machines / dishwashers.
Economy performed by producing 1500W PV power supply:
A) - Ballon thermo 400W required for its operation (-4380 kWh / year) over cumulus. thermoelectric ball 400W powered by the sun (PV).
B) - Washing machine + dishwasher 250W for their simple operation (-1360 kWh / year) free hot water produced by the ball, electrically powered by the sun.
C) - 1000W power available to power in a more air conditioning, TV, Ordis, or all remaining vigils. (-1400 KWh / year) saving on air-conditioning, TV, Ordis, various watches.
ANNUAL SAVINGS MADE: 7140 kWh
_______________________________________________________________________
Conclusion:
Photovoltaic power 1500W 7000 can generate more kWh annual savings.
How? directing the operation of appliances to daylight hours and therefore of production, themselves supplied with hot water by one heat pump, which heats it in turn for sunshine, consuming more daily hours of electricity FREE .
On 13300 kWh / year of energy requirements representing € 1530 in 2014, 7140 can be saved kWh / year almost half of the invoice, by combining photovoltaic and Ballon Thermodynamics.
Sylvain enr.
http://www.awesfrance.fr/autoconso66/
