A very simple formula for such a calculation looks the most simple - 1 kW of heat energy is spent on heating 10 m2 of building area. A more accurate formula operates not with areas, but with the cubic capacity of the house, also taking into account the ceiling height in the room. However, for ordinary-type dwellings with a ceiling height of 2.5-2.7 meters, the above very simple ratio is valid. The correct calculation of the need for heat energy depends not only on the volume of the heated space, but also on the thermal resistance of walls, openings and ceilings. Moreover, in this case, the average annual temperature and other invisible but important factors are taken into account.
Boiler installation room
But in order to determine the volume of fuel, the usual formula will be enough for us: 1 kilowatt = 10 square meters. As a result, to heat a structure with an area of 150 or 200 square meters, you need to spend 15 or 20 kW, based on this. And this is only per hour. But the boiler does not consume gas every minute. The work/downtime period is divided here in a ratio of 50/50 percent. Thanks to this, a house with an area of 150 square meters will spend 180 kW (15x24/2) per day, and a house with an area of two hundred square meters will spend 240 kW.
The cold season in our latitudes lasts from October to April - 7 months or 210 days. Thanks to this, the annual heat energy consumption will be 37,800 and 50,400 kW. We will look at these values in our further calculations.
Is it better to heat with gas or electricity and how to save on heating?
Volumetric calculation of fuel for heating a house
So, above in the text we have established that from a cubic meter or liter of natural or liquefied gas, 9.3 or 6.55 kW of heat energy is released based on this. This means that to generate 37,800 and 50,400 kW (costs for the cold season for houses of 150 and 200 square meters) we will need:
- 4064 and 5419 cubic meters of network gas (37800/9.3 and so on).
- 5771 and 7695 liters of liquefied fuel (37800/6.55 and so on).
For accuracy, we must add 10% to these values, because the efficiency of a gas boiler is 90 percent (a tenth of the gas combustion energy is wasted). As a result, we look at the following picture:
- The estimated gas consumption for home heating with an area of 150 m2 is 4471 m3 or 6348 liters.
- Exemplary fuel consumption for heating a structure of two hundred square meters - 5960 m3 or 8464 liters.
Propane cylinders
The indicated gas consumption is calculated for the entire cold season - seven months, from the beginning of October to the end of April. Thanks to this, in a warm year you will most likely spend less gas than we calculated. But even these results make it possible to determine whether natural or liquefied fuel is more cost-effective.
Which gas to choose - which is more cost-effective?
To connect to the main gas pipeline, the client will need to pay for the design and assembly work. And these expenses cannot be called insignificant. The growing appetites of gas services make gasification of homes a very expensive undertaking. Still, all these expenses will pay off during operation. As of March 2017, the cost of a cubic meter of gas, depending on the region of the Russian Federation, can range from 4.44 to 8.66 rubles. The average cost is 6.55 rubles. As a result, heating with network gas to a house of 150 or two hundred square meters, taking into account the estimated consumption rate during the season, will cost 29,825 and 39,038 rubles.
Liquefied fuel does not require tapping into the pipeline, however, to store it, you need to build a gas tank - a container that accepts the required volume of fuel. Moreover, this container will sometimes have to be filled with gas, which is transported to the site using specialized transport, and such a service is expensive. And in addition, the gas tank will have to be repaired and operated. After all, the safety of all residents of a house heated by liquefied gas depends on its condition.
Liquefied fuel storage
At the beginning of spring 2017, a liter of liquefied gas at gas stations cost from 11 to 20 rubles, depending on the region of the Russian Federation. The average price of this fuel was 15.5 rubles. Thanks to this, heating a 150-square-meter house with liquefied gas will cost 98,394 rubles. For a dwelling with an area of two hundred square meters you need to pay much more - 131,192 rubles. As you can see, liquefied fuel has surpassed network gas in price by 3.3 times. Thanks to this, conclusions regarding whether it is profitable or unprofitable suggest themselves - real (main) gas, with all the bureaucracy and difficulty of the connection process, will be more profitable than liquefied fuel.
How to reduce fuel consumption for the owner of a private house
The amounts mentioned above can stun an impressionable tenant or an ordinary city resident. Well, what can you do - there was “own house” expensive pleasure at all times. However, unlike a city resident living in an apartment, the owner of a private home is able to change the costs of heat supply in his own favor.
Insulation work at home will help reduce heating costs
To do this, he will have to do the following:
- Thermally insulate the facade, foundation, roof, attic and basement ceiling - even a thin layer of thermal insulating material can make up at least a couple thousand, or even a whole ten, from the gas bill.
- Replacing old windows with modern glass packages, installing a heat-resistant panel in the door opening is another 5-10 thousand minus. Moreover, windows and doors should be tackled first, because they generate at least 40 percent of heat loss.
- Place a heat accumulator in the basement or boiler room, replace the wiring diagram with a double-circuit or manifold version, which allows for spot thermoregulation of radiators, buy a boiler with a high coefficient useful action. Today there are excellent 95% devices on sale. In this case, savings can be up to 10-15 percent of the total invoice amount.
In short, we need, firstly, to increase the thermal resistance of the house, and secondly, to use more energy-efficient equipment. And no one is forcing you to make these changes in one season. You can start with the windows, then improve the boiler and get closer to the surface of the walls and ceilings. As a result, you will be able to save up to a quarter of the stated costs.
Thematic publications:
Cheap heating in a private house. Personal experience
Russian stove with my own hands- detailed instructions
Oil recovery furnace: how to build such a heating device with your own hands
Gas is still the cheapest type of fuel, but the cost of connection is sometimes very high, so many people want to first assess how economically justified such expenses are. To do this, you need to know the gas consumption for heating, then you can estimate the total cost and compare it with other types of fuel.
Calculation method for natural gas
The approximate gas consumption for heating is calculated based on half the power of the installed boiler. The thing is that at the lowest temperature is set. This is understandable - even when it is very cold outside, the house should be warm.
But calculating gas consumption for heating using this maximum figure is completely incorrect - after all, in general the temperature is much higher, which means much less fuel is burned. That’s why it is generally accepted that the average fuel consumption for heating is about 50% of the heat loss or boiler power.
We calculate gas consumption based on heat loss
If you don’t have a boiler yet, and you estimate the cost of heating in different ways, you can calculate it from the total heat loss of the building. They are most likely known to you. The technique here is this: they take 50% of the total heat loss, add 10% to provide hot water supply and 10% to remove heat during ventilation. As a result, we get the average consumption in kilowatts per hour.
Next, you can find out the fuel consumption per day (multiply by 24 hours), per month (by 30 days), and, if desired, for the entire heating season (multiply by the number of months during which the heating operates). All these figures can be converted into cubic meters (knowing the specific heat of combustion of gas), and then multiply the cubic meters by the price of gas and, thus, find out the heating costs.
| Crowd name | Unit | Specific heat of combustion in kcal | Specific heat of combustion in kW | Specific heat of combustion in MJ |
|---|---|---|---|---|
| Natural gas | 1 m 3 | 8000 kcal | 9.2 kW | 33.5 MJ |
| Liquefied gas | 1 kg | 10800 kcal | 12.5 kW | 45.2 MJ |
| Coal (W=10%) | 1 kg | 6450 kcal | 7.5 kW | 27 MJ |
| Wood pellets | 1 kg | 4100 kcal | 4.7 kW | 17.17 MJ |
| Dried wood (W=20%) | 1 kg | 3400 kcal | 3.9 kW | 14.24 MJ |
Example of heat loss calculation
Let the heat loss of the house be 16 kW/hour. Let's start counting:
Convert to cubic meters. If we use natural gas, we divide the gas consumption for heating per hour: 11.2 kW/h / 9.3 kW = 1.2 m3/h. In calculations, the figure 9.3 kW is the specific heat capacity of natural gas combustion (available in the table).
Since the boiler has not 100% efficiency, but 88-92%, you will have to make further adjustments for this - add about 10% of the obtained figure. In total, we get gas consumption for heating per hour - 1.32 cubic meters per hour. Next you can calculate:
- consumption per day: 1.32 m3 * 24 hours = 28.8 m3/day
- monthly demand: 28.8 m3/day * 30 days = 864 m3/month.
The average consumption for the heating season depends on its duration - multiply by the number of months while the heating season lasts.
This calculation is approximate. In some months, gas consumption will be much less, in the coldest month - more, but on average the figure will be about the same.
Boiler power calculation
The calculations will be a little simpler if you have the calculated boiler power - all the necessary reserves (for hot water supply and ventilation) have already been taken into account. Therefore, we simply take 50% of the calculated capacity and then calculate the consumption per day, month, per season.
For example, project capacity boiler - 24 kW. To calculate gas consumption for heating, we take half: 12 k/W. This will be the average heat demand per hour. To determine fuel consumption per hour, we divide by the calorific value, we get 12 kW/hour / 9.3 k/W = 1.3 m3. Then everything is calculated as in the example above:
Next, add 10% for the imperfection of the boiler, we find that for this case the consumption will be slightly more than 1000 cubic meters per month (1029.3 cubic meters). As you can see, in this case everything is even simpler - fewer numbers, but the principle is the same.
By quadrature
Even more approximate calculations can be obtained based on the square footage of the house. There are two ways:
Each owner can assess the degree of insulation of his home, and accordingly, one can estimate what gas consumption will be in this case. For example, for a house of 100 sq. m. with average insulation, 400-500 cubic meters of gas will be required for heating, for a house of 150 square meters it will take 600-750 cubic meters per month, for heating a house with an area of 200 m2 - 800-100 cubic meters of blue fuel. All this is very approximate, but the figures are derived based on many factual data.
Calculation of liquefied gas consumption
Many boilers can run on liquefied gas. How profitable is this? What will be the consumption of liquefied gas for heating? All this can also be calculated. The technique is the same: you need to know either the heat loss or the power of the boiler. Next, we convert the required quantity into liters (units of measurement of liquefied gas), and, if desired, we count the number of required cylinders.
Let's look at the calculation using an example. Let the boiler power be 18 kW, respectively, the average heat demand is 9 kW/hour. When burning 1 kg of liquefied gas we get 12.5 kW of heat. This means that to get 9 kW, you will need 0.72 kg (9 kW / 12.5 kW = 0.72 kg).
- per day: 0.72 kg * 24 hours = 17.28 kg;
- per month 17.28 kg * 30 days = 518.4 kg.
Let's add a correction for the boiler efficiency. We need to look at each specific case, but let’s take 90%, that is, add another 10%, it turns out that the monthly consumption will be 570.24 kg.
Liquefied gas is one of the heating options
In total, this boiler will require 27 liquefied gas cylinders. Calculate the cost yourself - prices vary in the regions. But don't forget about transportation costs. By the way, they can be reduced by making a gas holder - a sealed container for storing liquefied gas, which can be refilled once a month or less often - depending on the storage volume and demand.
Again, remember that this is just an approximate figure. In cold months, gas consumption for heating will be higher, in warm months it will be much less.
- 1 liter of liquefied gas weighs approximately 0.55 kg and, when burned, produces approximately 6500 kW of heat;
- There are about 42 liters of gas in a 50 liter cylinder.
According to the standards, thermal calculations of premises are carried out for extreme conditions - the coldest winter five-day period. The boiler unit must have sufficient power to replenish the heat losses of the house in conditions of prolonged frosts characteristic of a particular climate.
As a result, we have the following situation:
- the boiler power is designed for maximum load;
- boiler equipment is selected with a small power reserve;
- When selecting the power of the unit, the gas consumption for cooking and the use of other equipment operating on this fuel is taken into account.
Accordingly, it makes no sense to calculate gas fuel consumption based on the rated power of the boiler unit. IN real conditions During the heating season (in the main territory of the country it lasts about 7 months), the temperature fluctuates within a significant range.
Attention! According to the above, in order to calculate the average gas consumption for heating, the design, and not the nameplate, power of the boiler should be divided by 2.
Example: for simplified calculations of coolant consumption, the standard value of thermal power is used: 1 kW per 10 m 2 of a private house. This means that the estimated power of the boiler unit for a house of 100 m2 will be 10 kW. Therefore, the thermal power indicator (Q), which we need to calculate the average fuel consumption, is 10/2 = 5 (kW).
Heating with main gas
V = Q / (Hi × ηi), Where:
- V (m 3 /hour)– the volume of gas that needs to be consumed to obtain a certain amount of thermal energy;
- Q (kW)– calculated thermal power, allowing to maintain a comfortable temperature level in the house;
- Hi (kWh/m3)– indicator of the lowest specific heat of combustion of gas, standard tabular value (details below);
- ηi (%)– Boiler unit efficiency, an indicator of how efficiently a gas boiler uses the generated thermal energy to heat the coolant.
Let's look at the specific heat of combustion of gas. Main networks mainly use G20 gas, but G25 gas can also be used; information can be obtained from your local gas supply organization. G25 gas has a higher nitrogen content, which reduces its energy potential.
In addition to the indicator Hi, which we need for calculations, the table shows the indicator Hs– it is used when calculating fuel consumption for condensing boilers. This new generation equipment is more efficient due to the fact that during the steam condensation process, an additional 10% of thermal energy is removed.
Attention! You need to substitute a value into the formula Hi in kWh/m3.
Boiler efficiency (ηi) indicated in the product passport. If the document contains two indicators (for the lower and higher calorific value of gas fuel), use the smaller coefficient for calculations, since it more accurately reflects the real capabilities of the boiler.
Example: let's calculate the average consumption of main gas G20 for a house with an area of 100 m2. In this case, we will assume that the house is insulated and the calculated thermal power is 9.6 kW, and the efficiency of the boiler unit is 0.92%.
As we already know, the calculated thermal power should be divided by 2, i.e., Q = 9.6/2 = 4.8 kW.
Thus: V = 4.8 / (9.45 × 0.92) ≈ 0.56 m 3 /hour.
Let's calculate the fuel consumption of G20:
- per day 0.56 × 24 = 13.44 m 3;
- per month (on average) 13.44 × 30.5 = 409.92 m 3;
- during the heating season (7 months) 409.92 × 7 = 2869.44 m 3.
To calculate the annual financial costs of heating, multiply the resulting value by the cost of one m 3 of main gas in your region.
Let's calculate the gas consumption for heating a house of 150 m2. If the fuel is main gas G25, the boiler efficiency is 0.92, and to calculate the design power, a standard indicator of 1 kW per 10 m 2 was used, i.e., Q = 15/5 = 7.5 kW.
V = 7.5 / (8.13 × 0.92) = 1.002 m 3 /hour.
Let's round up to 1 m 3 / hour and calculate the annual consumption: 1 × 24 × 30.5 × 7 = 5124 m 3.
This system calculations help to obtain an average value - on cold days the intensity of fuel consumption increases, on warm days it decreases relative to the average.
Costs for heating with liquefied gas
The consumption of liquefied gas for heating a house is calculated so that:
- understand the level of financial costs for purchasing fuel;
- define optimal size gas holder or count the number of gas cylinders, develop a suitable schedule for their delivery.
Calculations are carried out according to the same scheme as in the case of using main gas, but the volume of liquefied gas is measured in liters.
Liquefied hydrocarbon fuel G30, which is mainly used for autonomous gasification systems, is a propane-butane mixture with the following characteristics:
- fuel density 0.524 kg/l;
- specific heat of combustion 45.2 MJ/kg = 23.68 MJ/l = 6.58 kW/l.
Important! To fill the gas tank, fuel with different percentages of propane and butane is used (summer and winter), so be careful when choosing liquefied gas and take its characteristics into account when making calculations.
Let us apply the formula V = Q / (Hi × ηi) that is already familiar to us to calculate the volume of liquefied fuel required to heat a house with an area of 200 m 2.
We will assume that the calculated consumption corresponds to the standard (1 kW per 10 m2), i.e., Q = 20/2 = 10 kW. Boiler efficiency is 0.92%.
V = 10 / (6.58 × 0.92) = 1.65 l/hour.
Therefore, the approximate annual consumption will be: 1.65 × 24 × 30.5 × 7 = 8454.6 liters.
By adding to the obtained value the fuel consumption for a gas stove, etc., you can determine what size of gas holder you need to choose in order to refuel it 1-2 times a year.
If gas is supplied in cylinders, we can calculate the amount required for heating. The total volume of the cylinder is 50 liters, but they are not completely filled, so the volume of liquefied fuel is about 42 liters.
8454.6 / 42 = 201.3 cylinders for a house with an area of 200 m2 per heating season (7 months).
So, by substituting into the formula the values corresponding to the parameters of your home, the characteristics of the fuel and the boiler unit, you can easily calculate the average gas consumption for heating.
How to save money?
The financial costs of maintaining a comfortable microclimate in the house can be reduced by:
- additional insulation of all structures, installation of windows with double-glazed windows and door structures without cold bridges;
- installation of high-quality supply and exhaust ventilation (an incorrectly executed system can cause increased heat loss);
- use of alternative energy sources - solar panels, etc.
Separately, it is worth paying attention to the advantages of the collector heating system and automation, thanks to which the optimal temperature level is maintained in each room. This allows you to reduce the load on the boiler and fuel consumption when the weather gets warmer outside, and reduce the heating of the coolant that is supplied to radiators or a heated floor system in unused rooms.
If the house has a standard radiator system, a sheet of thin foam heat insulator with an outer foil surface can be glued to the wall behind each heating device. Such a screen effectively reflects heat, preventing it from escaping through the wall to the street.
A set of measures aimed at increasing the thermal efficiency of a home will help minimize energy costs.
How to avoid heat loss
Fuel consumption for heating a house depends on the total area of the heated premises, as well as the heat loss coefficient. Any building loses heat through the roof, walls, window and door openings, and the floor of the lower floor.
Respectively, the level of heat loss depends on the following factors:
- climate features;
- wind roses and the location of the house relative to the cardinal directions;
- characteristics of the materials from which building structures and roofing are constructed;
- presence of a basement/ground floor;
- quality of insulation of floors, wall structures, attic floors and roofs;
- quantity and tightness of door and window structures.
Thermal calculation of the house allows you to select boiler equipment with optimal power parameters. In order to determine the heat requirement as accurately as possible, the calculation is performed for each heated room separately. For example, the heat loss coefficient is higher in rooms with two windows, in corner rooms, etc.
Note! The boiler power is selected with some margin relative to the obtained calculated values. The boiler unit wears out faster and fails if it regularly operates at its maximum capacity. At the same time, an excessive power reserve results in an increase in financial costs for the purchase of a boiler and increased consumption fuel.
When designing a heating system, home owners must clearly understand How much will it cost to heat a living space?
The reason for unprofitable operation is the incorrect selection of equipment, incorrect design, and walls with weak thermal insulation. Because Correct calculation is important.
Upon completion, the person starts from the amount received and accepts final decision on the purchase of equipment.
What is the average fuel consumption for heating a 200m2 house?
It's one thing when expenses are calculated in an equipped house.Record the indicators from the counters, sum them up, calculate the arithmetic average. But when they're just about to set up house heating system and choose an energy carrier, completely different methods are used.
Photo 1. Diagram of the heating system of a private two-story house using a gas boiler from a gas holder.
Natural gas
The most convenient energy carrier for heating a private house. Choose a boiler based on its power. Both gas consumption and the profitability of the entire system as a whole depend on it. But power is not the only factor. The influence is exerted by climate, region, insulation, number of windows and much more.
Important! If during the calculation the system requires, for example, 13-14 kW, then the owner should choose boiler with an indicator of 16 to 17.
Formula: V= N/Hi × nj
Explanation:
- V— amount of heat energy.
- N- required heating power.
- Hi— minimum specific heat of combustion.
- nj— efficiency factor.
Thermal power (N) is calculated in the ratio 1kW/10m 2.
Specific heat of combustion“—” tabular value. Her divide by 2, so we take the average value.
Types of natural gas
Exists 2 types natural gas:
- Gas type G 20 - 9.45 kW/m 3.
- Gas type G 25 - 8.13 kW/m 3.
The first type is most often used. The energy potential of the second is less due to the increased nitrogen content.
Efficiency indicated in the product passport, for example, let’s take 84%.
All the necessary data has been obtained, all that remains is to start calculating the natural gas consumption for a room with an area of 200 m 2.
N = 1kW200m2
Hi = 9.45kW/m3
nj = 84%
V= 0.565m3/hour
Now we calculate the consumption for the week: 0.565×24×7 = 94.92m 3.
The duration of the heating season may vary in regions, so let’s take an average 7 months: 0.565×24×30.57 = 2896m3.
In total, knowing the price per cubic meter, it is easy to plan the cost of annual heating.
Liquefied gas from cylinders or gas holder
Used when the house is at a great distance from gas pipelines. Delivered by a special service and stored in cylinders.
Calculating the consumption of liquefied gas is the same as that of natural gas, but has its own nuances. For example, fuel is expressed not in cubic meters, but in kilograms, because it is not a gas.
It is worth paying attention to fuel density (0.524kg/l) And specific heat of combustion (45.2MJ/kg). We use the same formula and substitute the value:
V = 4.7 / (6.58 × 0.88) = 0.81 l/hour
Consumption during the week: 0.8124×7 = 136l
Consumption seasonal: 0.8124×30.5×7 = 4150l
This option will cost a large sum. A lot of money is spent on transporting cylinders. But it is still more economical than, for example, electronic heating.
Useful video
Watch a video that talks about the features of heating a house with liquefied gas.
Most often we think about how much fuel we have used when bills for the heat received arrive. And if the amount is frighteningly large, we begin to carry out calculations. There are methods that make it possible to calculate, for example, both at the design stage and in a completed building, the gas consumption for heating a house of 200 m2. The results obtained will help to audit the heating system and develop methods to reduce the costs of maintaining a comfortable microclimate in the house.
Gas... and other gas
For many years, blue fuel has been the most popular and cheapest energy carrier. Most often, two types of gas are used for heating and, accordingly, two connection methods:
Trunk. This is methane purified from impurities with the addition of a tiny amount of fragrance to facilitate leak detection. Such gas is transported through gas transportation systems to consumers.
Liquefied mixture propane with butane, which is pumped into a gas tank and provides autonomous heating. When this liquid transforms into a gaseous state, the pressure in the tank increases. Under the influence high pressure the gas mixture rises through pipes to the point of consumption.
Both types have their pros and cons:
When connecting to a main line, there is always a risk of pipeline breakdown, pressure reduction in him. The gas tank provides complete autonomy; you only need to monitor the availability of gas;
gas tank equipment and its maintenance expensive. But this is the only possibility of gas heating if there is no mains in the accessible vicinity;
to calculate gas consumption for heating a house of 100 sq m, perform fuel calorie comparison from the main line and the liquefied mixture in the cylinder. The calorie content of a propane-butane mixture is three times greater than that of methane: the combustion of 1 m 3 of the mixture produces 28 kW, and the combustion of the same amount of methane produces 9 kW. Accordingly, different amounts will be spent on heating the same area.
The liquefied mixture is often for autonomous heating pumped into small containers.
For autonomous heating they also use liquefied gas in cylinders Source blog.mybacharach.com
insulation of houses
What increases gas consumption
Gas consumption for heating, in addition to its type, depends on such factors:
Climatic peculiarities terrain. The calculation is carried out for the lowest temperature indicators characteristic of these geographical coordinates;
Square the entire building, its number of floors, the height of the rooms;
Type and availability insulation roofs, walls, floors;
View buildings (brick, wood, stone, etc.);
Profile type on the windows, the presence of double-glazed windows;
Organization ventilation;
Power in the limit values of heating equipment.
The year the house was built and the location of the heating radiators are also important.
Calculation of main gas flow
The calculation of the required power is carried out on the assumption that the height of the rooms does not exceed 3 m, its area is 150 m 2, the condition of the building is satisfactory, and there is insulation. Then, to heat 10 m2 of area, an average of 1 kW of energy is consumed at a temperature lower than –10 0 C. Since this temperature, on average, lasts only half of the heating season, we can take the base value as 50 W*m/hour.
Gas consumption for heating a house of 150 m2 will be determined by the ratio
A = Q / q * ɳ
Q in the selected example it is calculated as 150 * 50 = 7.5 kW and is the required power needed to heat a given room.
q is responsible for the type of gas and provides specific heat. For example, q = 9.45 kW (G 20 gas).
ɳ shows the efficiency of the boiler expressed in relation to unity. If efficiency = 95%, then ɳ = 0.95.
Let's carry out the calculations and find that the gas consumption for a house with an area of 150 m2 will be equal to 0.836 m3 per hour, for a house measuring 100 m2 - 0.57 m3 per hour. To obtain the average daily quantity, the result obtained is multiplied by 24, for the monthly average - multiplied by another 30.
If you change the boiler efficiency to 85%, 0.93 m 3 will be consumed per hour.
Calculation of the amount of liquefied gas
The formula A = Q / q * ɳ can be used to determine the amount of various fuels. Since liquefied gas is either in a gas tank or in cylinders, the volume of their capacity is measured in m3, therefore the consumption of liquefied fuel is calculated in these units.
The table shows the cost of autonomous gasification Source website
When calculating the consumption of liquefied gas for heating a house of 200 m2, take into account such indicators:
density mixtures of propane and butane. For example, for type G 30 ρ = 0.524 kg/l;
specific calorific value. For G 30 it is equal to 45.2 MJ/kg (23.68 MJ/l) or 6.58 kW/l.
Average values can be taken from the first example, given that Q = 200*50 = 10 kW
A = 10 / (6.58 * 0.95) = 1.6 l/hour
Average daily consumption will be 1.6 * 24 = 38.4 (l)
Provided that a cylinder with a capacity of 50 liters is used, but filled for safety reasons to 42 liters, it can be argued that it will last for approximately a little more than a day.
Average monthly gas consumption will be 38.4 * 30 = 1152 liters. And this is already 27.5 cylinders (1152/42 = 27.5).
Similar calculations can be carried out in order to determine the gas consumption for heating a 100 m2 house from a gas holder. Its quantity will also be determined in liters.
A = 5 / (6.58 * 0.95) = 0.8 l/hour
In a day, the gas tank will be empty by 19.2 liters, and in a month - by 576 liters, over a heating season of 7 months - by 4032 liters. This must be taken into account in order to replenish the capacity in a timely manner.
The gas tank is refilled using special machines Source pinterest.cl
How much does heating cost?
The amount of heating depends on the amount of gas consumed and the price per 1 m3 in a given region. By simply multiplying two numbers, you can determine costs per day, per month or for the entire heating season.
From the point of view of the absolute price per m 3 (kg), main methane is 3-4 times cheaper than a propane-butane mixture. However, when comparing the heating consumption of a building of 100 m2, methane requires an average of about 3000 m3, and only 1000 m3 of liquefied mixture. Therefore, it can be argued that how much liquefied gas costs for heating a house is the same price for main gas, due to higher consumption.
Video description
About the nuances of heating a house from a gas tank and pricing, see clearly in the video:
How to pay less
Since you won’t be able to significantly win in price by installing autonomous heating, you need to turn to energy-saving technologies.
Carry out a thorough insulation not only the walls of the building, but also the roof, floor, foundation, even the basement, if there is one.
Replace double glazed windows for energy-saving ones, the profile is frost-proof.
Install the boiler with maximum efficiency and an electronic thermostat.
Check the state of the house's thermal insulation on a thermal imager to identify cold spots and eliminate them.
Change ventilation and air conditioning system. Simply an open window or a window set for ventilation takes in more heat than a window open for 5-7 minutes and complete replacement indoor air.
Equip warm floor, especially in halls and hallways.
Install electronic radiators sensors, to block heating above the set temperature.
It is very effective to use the smart home system, which will reduce gas consumption by at least 25%. If you follow all the tips, your home will be warm and cozy, and your gas bills won’t be terrible.
The smart home system is easier and more comfortable to control using a remote control Source archidom.ru
On our website you can find contacts of construction companies that offer country house design services. You can communicate directly with representatives by visiting the “Low-Rise Country” exhibition of houses.
Conclusion
If a house is built according to a well-designed project, then what the gas consumption will be during the heating season can be imagined in advance. If calculations are made for an existing house, with the goal of insulating it, then the best solution would also be to turn to professionals who will not only mechanically do their job, but will also be able to advise something.
