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Gas or Wood Pellets: what to use in the Owner-occupied Dwelling?


Gas or Wood Pellets: what to use in the Owner-occupied Dwelling?

Mathematical problem is as follows:
A house of 160 meters has 2 bathrooms and a kitchen. Locality is near Moscow (Kaluga region to be precise)
Major staying time is summer, staying time in winter is week-ends + holidays.

We need a boiler operating for heating and hot water supply. There are two options: to buy a gas boiler of about 30 thousand cost or a pellet boiler of about 150 thousand cost. There is no main-line gas, we need a 4800 liters gas receiver turnkey of about 300 thousand cost.
Total costs: 330 thousand rubles is the cost of gas, 150 thousand rubles is the cost of pellets.

Here it’s all true. These are the initial costs. If we take a lifetime of 10 years, 10% of these costs is required to add to the cost of the fuel. However, LPG has hidden costs: the agreement of 15 thousand rubles on tank service and of 10 thousand rubles on boiler service. In total we have +25 thousand rubles/ year. You will manage to service the boiler by yourself but you will not succeed in service of the tank. Let us consider the worst scenario: LPG + 58 thousand rubles/ year.

Upon the end of the heating season, you can brush the pellet boiler.

The cost of 1 kW*h of gas is about 2 rubles (at the price of 16 rubles per liter of propane-butane), the cost of 1 kW* h of pellets is about 1.5 rubles (at the price of 6000 per ton). This means that, if the cost of pellets does not rise, the gas will not be paid off and will not be more economical than pellets.

Here you are wrong (tales of LPG sellers) 1 liter of LPG= 520gramm. 1kg = 1,92liters = 10 kW * h, boiler efficiency is 90%, a total of 2,14l = 10 kW * h. If to refer to the money, the figures are as follows: LPG 1 kW * h = 3,42 rubles, but that's not all: gas condensate: up to 5%  of the filling volume, let us  take the average of 3% (it is easy to take 200-300 l / season from your tank). The full price: 3,53 rubles + expenses about what I have written above per season.

Pellets: real thermal capacity is 4,6kW*h/kg, the efficiency is in the area of ​​88-92% (of the equipment), at the output from the boiler there is a correctly specified number - 4 kW* h/ kg, 2.5 kg= 10 kW* h, if to refer to the money, the figure is 1kW* h = 1,5r + expenses about what I have written above.

Judging from this, LPG will not be paid off ever ... Heating with the help of LPG is more expensive than daily electricity, at the moment LPG is the most expensive heating. It is easy to check what I’m talking about. You can find all thermal capacity data in Wikipedia.

If we take that for one-year heating period it is required to spend (if to be resident in the house all year round) 400 kW*h per 1m2 (50 liters of gas and 100 kg of pellets), so, for the house of 160 meters it is required to generate 64 000 kW*h. The difference for the year between gas and pellets will be 32 000 rubles with full heating. The consumption of gas is 8000 liters, i.e. a little bit less than 2 gas receivers of 4800 liters each, the consumption of pellets is 16 tons. It is worth noting, by the way, that all economic benefits from pellets finish almost immediately because their supply will cost roughly the same 32 000, and what is more, they have to be stored somewhere. However, in any case pellets do not seem more expensive.

I have not seen such houses, it is the data for the panel house without insulation. For a semi-insulated house of 160m2- 42 * 24 * 160 * 200= 32256 + 2000 kW* h (main computer center)= 34256, the figure is the average for the season. I do not know your house, if you need more detailed information, please feel free to contact me.

The figures for all-year residence: LPG -3425kg or 6576l + expenses. If to refer to the money: 105216r + 58000r = 163216r.

The figures for all-year residence: pellets- 8564kg + expenses. If to refer to the money: 51384r + 15000r = 66384r

If you take 9 tons continuously, the delivery cost will be 6900 thous., if you take for 2 seasons at a time – we will arrange direct delivery from the factory, and the price will be 5900 thous. Please feel free to contact us. We do not install gas receivers in principle, but you are welcome with the installation of any boiler equipment.

[*] There is no difference in the establishing (construction, and so on) of the boiler room operating on gas and pellets.

 It’s absolutely right.

[*] As in winter time we go to the house only for the weekends, we can leave gas in the mode of “keeping warmth” with quite small fuel consumption, and coming back in a month, we will need only a half a day to heat a house to an acceptable condition. It is impossible to do the same using pellets, so, correspondingly, it is unlikely to arrange the option with week-ends, otherwise you will have to come back every time to a completely cold house.

For a half a day warming up, it is required to have a boiler of approximately a margin of 2-3 times and the corresponding heating system.

We can have the same scenario with pellets:

Option 1. Using programmable thermostat, you should set a week program- weekdays + 5-10, up to the Friday evening + 22, or you can have daily programs for the same decreases ... If you live all year round.

Option 2. There is a complete management and control of the boiler from your computer or PDA, and also from the entire heating system, it is possible at any time to see the operation of the boiler, fuel consumption, change the temperature in the house and so on, but this option is more expensive.

About a month of absence: here I partially agree. If to install a hopper of 400kg, then at the temperature of -8 the autonomous operation is 16 days, at the temperature of 0 the autonomous operation is 30 days, at the temperature of -25 the autonomous operation is 9.7 days, the calculations were for + 8-10 inside. However, it is possible to assemble a system with the autonomous operation for the whole year (365 days), in this case the cost of the equipment is just a little bit more, and we use some other technical solutions.

 [*]It is possible to use a gas stove.

We have caught you…the scenario is impossible for pellets...
However, 2 balloons together will cover your needs...Otherwise, you can use a safer option with an induction stove.

Induction stoves function as gas stoves and even faster, but if to compare with standard heating, I don’t like them.

[*]Gas can be adjusted, I mean to heat in summer only a little bit.

The same scenario is with pellets, the power capacity of a burner is designed for 5-20 kW. We have a little bit different scenario with gas: according to the design we have only ON-OFF buttons, only expensive gas boosting burners can change the power capacity by 2 times only.
It’s not crucial for you, we will have the same in terms of comfort and abilities.
Here please find the questions:

  • For some reason, at a forum I have heard a lot of times recommendations to heat with a boiler only and to install electric boiler to have hot-water supply. Why is it so?
    If we have a wall-mounted boiler, the situation is exactly like this, if to install an indirect heating boiler and a boiler of sufficient power, we use the boiler. Simply it doesn’t have sense to turn on the boiler in summer when it’s hot in order to have a hot water supply.
  • Is it the correct price for pellets (6000 tons + approximately 2000 - delivery)?
    You can see the response above: I recommend to buy pellets and the cost for May-August will be cheaper than it was written, the cost for November-March will be more expensive than it was written…


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