Heating a private house with liquefied gas
Choosing a liquefied gas boiler
An important criterion is power, measured in kW. The heated area, as a rule, is 9-10 times larger than this value. That is, choosing a boiler with a capacity of 11.3 kW, you will heat a room with an area of about 100 m 2.
However, it is necessary to make an allowance for the fact that during prolonged and severe frosts, equipment of such power will not be able to maintain the set temperature. Therefore, experts recommend choosing a boiler unit with a margin.
Other options:
- Boiler type. According to the method of installation, wall and floor models are distinguished, according to functionality - single- and double-circuit (heat + hot water), with an open or closed combustion chamber.
- efficiency. The higher the indicator, the more economical and efficient the installation will be. The parameter varies in the range of 90-94%.
- Pressure . An LPG unit must operate at low pressure (3-5 mbar). A low value will ensure that gas from the cylinders is produced without residue.
- Gas consumption . The figures indicated by the manufacturer are conditional and depend on the power and efficiency of the unit, the set temperature in the room and outside the window, the heat loss of the building and other factors.
When planning the construction of a house, the design of the heating system also needs to be given attention.
The right decision is to delegate the task to experienced designers who:
- calculate the amount of heat load;
- develop recommendations regarding the choice of heating equipment and related materials.
Knowing the desired parameters of the boiler, it remains to choose a device according to its appearance and price. Russian boilers are the cheapest. Popular Japanese-made models are twice as expensive. And the "Germans" will cost even more.
LPG boiler Principle of operation
Comparing conventional gas boilers and liquefied gas heating boilers, the following differences in the principle of operation can be distinguished:
- Less pressure is required for normal operation. The gas-air mixture is supplied under pressure not exceeding 3-4 mbar. The main gas is supplied under a pressure of 0.8-1 bar.
- Converting liquid fuel into gaseous. The propane-butane mixture is transported as a liquid. It turns into a gas under certain conditions. Constant pressure in the pipeline is one of them. Creating the necessary conditions, ensuring stable operation is the task of the gearbox mounted between the boiler unit and the fuel tank.
- efficiency. Heating boilers on liquefied gas operate with an efficiency of 92-95%.
- Nozzles. They have a different (smaller) outlet diameter. This ensures a low feed rate of the gas-air mixture, approximately 0.86 kg/h.
The principle of operation of boilers on liquefied gas Operation features
Choosing a boiler that runs on liquefied fuel, remember to follow the rules for the operation of these installations:
- It is prohibited to equip boiler rooms in basement or semi-basement premises. Propane-butane mixture is flammable. When mixed with air, it becomes explosive. And since the gas is heavier than air, in the event of a leak, it does not erode through the windows and ventilation, accumulating on the floor.
- If there is an underground storage for cylinders or a gas tank, it should be located no closer than 10 meters from the house.
- When equipping a storage facility in the depth of the site, there will be a problem with the passage of a tanker to it. There is also a huge list of requirements that must be met. In this regard, the design and installation should be carried out by a specialized organization.
- It is obligatory to have a maintenance contract for the installation.
- A double-circuit liquefied gas boiler costs much more than a single-circuit one. It is recommended to use the second option complete with a geyser. So you will save money and will not be left without hot water in the event of a breakdown of the boiler unit.
Outdoor installation of propane tanks The situation with the lack of energy
When choosing heating equipment, you should take care of the possibility of using other types of fuel.
Main reasons:
- To heat a house of 100 m 2 with a boiler with an efficiency of 92%, 18 liters of liquefied gas per day will be needed, i.e. one bottle of 50 liters is enough for 2.5 days. To ensure uninterrupted operation, 3 main tanks and 3 spare tanks are required.
- Replacing cylinders involves paying the costs of transporting and filling them.
- Frequent change of cylinders entails the risk of negligence in this procedure. As a result, leakage, ignition, explosion may occur.
- The equipment of a gas tank involves compliance with a large list of requirements, preparation of design documentation and obtaining permits.
Location of the gas tank for supplying liquefied gas Small area buildings
Cases when a boiler is the best option and the search for alternative heat sources is not important:
- Building area up to 50 m 2 .
- In the absence of people in the room, the temperature is maintained at 5-10 degrees.
- The operation of the boiler at full capacity is needed periodically.
Benefits of choosing:
- There is no need to prepare project documentation and obtain permits.
- It is permissible to install a low-power boiler unit of any type (wall-mounted, floor-standing). It is important to be able to switch to liquefied gas. There are no devices designed to run exclusively on propane. All models of equipment on the market can operate on natural gas and liquefied propane.
Advice! Select an anti-freeze fluid to fill the system to avoid an accident.
How to convert a heating boiler to liquefied gas
Tasks to be solved:
- Changing the rate of supply of the fuel mixture.
- Replacing nozzles by installing special jets.
- Changing operating parameters, setting automation for them.
Most models of modern single- and double-circuit boilers are designed to operate both on main gas and on liquefied fuel. It is enough to replace the nozzles and select a different operating mode.
Converting the boiler to liquefied gas fuel When the heater is not designed to operate on liquefied gas, switching the boiler to this type of fuel is somewhat more difficult. It is necessary to carry out work on the reconfiguration of control valves and automation.
It is important that all reconfiguration of the equipment is performed by a licensed specialist!
What is the consumption of liquefied gas at the boiler
You can find out this information by studying the technical documentation. Each model consumption is different, as it depends on a number of factors:
- Burner type.
- Selected settings.
- Performance.
On average, to provide a boiler with a capacity of 10-15 kW, 2 cylinders of fuel will be needed. Thus, it is more profitable to use main gas.
Heating system on liquefied gas based on the area of the house Switching the boiler to liquefied gas is only necessary in a number of cases:
- Temporary transfer. Registration of a new boiler, preparation of project documentation, connection of the installation to the main - operations that can take half a year. During this period, it is economically advantageous to use the already purchased boiler in a different mode of operation.
- Use of a gas tank. This technique is more cost-effective than using firewood, diesel fuel or electricity for space heating. An important nuance: the result of an incorrect setting is an increase in fuel consumption by 15%. You need to seek help from a qualified professional.
Therefore
It is advisable to use gas boilers for heating a private house that can run on liquefied fuel for the following reasons:
- Economic component.
- High operating safety.
- The ability to transfer equipment to a particular mode of operation.
At the same time, the operation of the boiler in this mode is not comfortable, since it involves constant material costs for refueling cylinders, and the expenditure of physical strength and time for connecting containers.
For heating an apartment, it is more profitable to use a conventional wall-mounted boiler connected to the central highway.
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