How to increase the efficiency of the gas boiler with your own hands: a review of the best ways
In order to define the concept of economical gas boiler it is necessary to clarify that such a boiler will heat the room with minimal costs.
It is a boiler, properly calculated on the power in accordance with the area of heating, with a high efficiency, with good regulation of the modes of operation, with an optimal gas flow rate.
If you summarize the criteria for the economy of the boiler, it is worth paying attention to the following:
- Optimum suitable output;
- High efficiency;
- Optimal design and optional equipment;
- A reliable, well-established manufacturing company.
Consider these and other criteria that affect the economy of the boiler. In more detail.
The efficiency is a percentage of the calorific value of the fuel. In other words, the efficiency indicates how much of the heat of combustion of fuel the boiler manages to use for heating. Any calculations are based on the properties of natural gas, which complies with accepted national standards.
Equipment performance depends on several major factors:
- Type of burner. closed models have a higher efficiency than atmospheric models;
- Heat exchanger design. wall-mounted and floor-mounted condensing models transfer the maximum amount of energy to the heat transfer medium;
- Control system. sensors, automatic solutions, built-in or separately mounted pump guarantee rational use of fuel;
- type of ignition. with an electric ignition device, there is no need to install a permanently working igniter, which saves resources;
- external factors. proper installation, chimney design, etc.д.
The most energy efficient boilers belong to the category of expensive, but the cost of their purchase and installation is more than compensated by the minimum fuel consumption, long service life.
You can calculate the values in several ways. In European countries, the calculation of boiler efficiency is made by the temperature of flue gases (method of direct balance), that is, knowing the difference between ambient temperature and the actual temperature of the flue gases. The formula is quite simple:
- ηbr (reads “this”). boiler’s “gross” efficiency;
- Qir(MJ/kg). the total amount of heat released during the combustion of fuel;
- Q1 (MJ/kg). the amount of heat that could be accumulated, t.е. To use for the heating of the house.
For example, if Q1 = 22 MJ/kg, Qir = 19 MJ/kg, then the “gross” efficiency = (19/22)100 = 86,3%. All measurements are taken at the already established, standard boiler operation mode.
The method of direct balance does not take into account the heat loss of the boiler unit itself, fuel underburning, deviations in operation and other features, so another, more accurate method of calculation was invented. “inverse balance method”. The equation used is:
- q2. heat loss with waste gases;
- q3. heat loss due to chemical underburning of combustible gases (applicable to gas boilers);
- q4. heat losses with mechanical underburning;
- q5. heat loss from outside cooling (through heat exchanger and body);
- q6. heat losses with physical heat of slag removed from the furnace.
net” efficiency of the heating boiler according to the method of reverse balance:
The actual efficiency will almost always be different from the manufacturer’s claims, since it depends on the correct installation of the boiler and heating system, the smoke extraction system, the quality of electricity supply, etc.д. Accordingly it is measured on site.
Even before you increase the efficiency of the radiator, you need to determine this parameter. In fact, it consists of several components. the efficiency of the boiler, radiators and pipelines. But besides this we need to take into account the value of heat loss of the building.
Therefore, you should not think first. how to increase the efficiency of the radiator, and to improve the thermal insulation of the house. Only after reducing losses through walls and windows can we proceed to the modernization of heating. It is mistakenly believed that the main indicator of the system is the efficiency of gas heating boilers or their solid fuel counterparts. However, in fact the beneficial effect of the system is determined by the following formula:
Where Q. efficiency factor, Vpotr. amount of energy spent on heating the coolant, Vpostup. the actual transfer of heat to the air in the room.
When analyzing the operation of the boiler, especially the gas type, it is clear that it does not function all the time. It must maintain the level of the coolant heating at the set thermal regime.
For the transfer of energy are responsible other elements of the system. pipelines and radiators.
First of all you need to pay attention to them, because 80% of heating system efficiency depends on their proper functioning.
What should be done to make this figure initially maximum:
- Select the low temperature mode of operation. With a minimum difference in water heating after the boiler and in the return pipe energy costs will be reduced;
- Using electronic control systems. thermometers and programmers. They will allow you to automatically change the work of the boiler when the temperature fluctuates in the house and outdoors;
- Carry out the modernization of the elements to reach the maximum efficiency of heating in the house.
All these ways are interconnected with each other. Therefore, when organizing heating it is necessary to go to each stage professionally.
During the design of the system it is necessary to calculate its basic parameters. heat losses, the operation of each node and the optimum temperature regime. You can do this by using online calculators (high margin of error) or by ordering a service from specialized calculation bureaus (accurate data).
High energy consumption of the gas boiler
If the floor gas boiler has a large gas flow, look at how the chimney is installed and what type of boiler is installed. Floor standing gas boiler has one disadvantage compared with the wall mounted boiler: greater fuel consumption. For countries with low gas (Russia, Belarus, Kazakhstan), this difference does not greatly affect gas consumption. But in countries with high energy tariffs and where there is a struggle against CO2 emissions (for example, in Europe), floor standing gas boilers are generally not available.
If you are the owner of a floor standing gas boiler and a conventional chimney is not installed by technology, there will be a large gas consumption. Cases of non-technological installation of the chimney include:
- The chimney is made of brick (this is prohibited for gas boilers).
- Used as a chimney pipes made of ferrous metals.
- Uninsulated stainless steel pipes are used as a chimney.
Any manufacturer of chimneys for floor gas boilers will advise to install an insulated sandwich pipe made of stainless steel. But this option is the most expensive.
If you have installed another option as a chimney, it is likely to be the main cause of high gas consumption boiler. Chimney replacement is the only way to reduce consumption.
All boilers, both wall hung and floor standing, are draught dependent.е. They need to create good conditions for the draft. If the draft is good, respectively a larger volume of air will enter the combustion chamber. In this case, floor gas boilers will completely, as far as possible, pass through the gas and burn the amount that enters it. Otherwise the fuel will not burn completely.
Defect or wrong setting?
Unpleasant phenomenon is often considered as a malfunction of equipment, but it is not so. The temperature sensor detects changes in temperature. the burner turns on. the boiler heats up. Everything is operating correctly and according to the preset conditions. And the fact that the cycle irrationally uses the resource of the boiler. the problem of the user, not the program.
Thus, tapping is not a defect, but the result of improperly set temperature intervals or a poorly organized heating system. There are several of the most common causes of incorrect operation of the boiler:
- Incorrectly installed thermometer.
- Small temperature intervals.
- Burner not adjusted.
- Low heat capacity of the heating circuit.
Exactly these problems are frequent reasons to call a master. Of course, you can do it yourself. just follow these simple tips.
How to calculate the efficiency of a gas heating boiler
Methodology for calculating the efficiency, occurs by comparing the spent thermal energy for heating the coolant and the actual amount of all heat released during the combustion of fuel. In factory conditions, the calculations are performed according to the formula:
In the formula for calculating the efficiency of a gas-fired hot-water boiler, the above values mean:
Qri. is the total amount of thermal energy emitted at fuel combustion.
This formula does not take into account many factors: possible heat losses, deviations in the system’s operating parameters, etc.п. Calculations allow to obtain only the average efficiency of the gas boiler. Most manufacturers specify exactly this value.
On-site evaluation of the error in determining the thermal efficiency. Another formula is used for calculations:
Calculations help to make an analysis, according to the peculiarities of a particular heating system. The abbreviations in the formula denote:
q2. heat loss in flue gases and combustion products.
The real efficiency of the gas heating boiler, is calculated only on site, and depends on a competently made system of smoke removal, the absence of violations at the installation, etc.п.
The temperature of flue gases, marked in the formula as q2, has the greatest influence on the thermal efficiency. If you reduce the intensity of the heating of the waste heat by 10-15 ° C, the efficiency increases by 1-2%. In connection with this, the highest efficiency in condensing boilers belonging to the class of low-temperature heating equipment.
What does the boiler efficiency depend on?
To find a solution, how to increase the efficiency of the gas boiler, you should first familiarize yourself with what parameters this factor depends on. The technical documents indicate a fairly high efficiency factor, but the actual percentage is almost always far below. The main parameters that affect the efficiency of gas boiler
- whether the type of fuel burned corresponds to the furnace where it is burned;
- what technical condition the heating equipment is in;
- The load on the heating system;
- How properly organized the heating system in a private home;
There are other parameters that affect the efficiency of the gas boiler. In order for the heating system to function most effectively, you should consider all the criteria on which the efficiency of the boiler depends.
Efficiency of boilers and radiators for heating: an overview and ways to increase
Optimizing the cost of heating is directly related to improving the efficiency of the entire system. There are several ways to achieve this.
But experts recommend that you first analyze and identify the most important factors that affect this indicator.
Based on these data, calculate the actual efficiency of boilers and heating systems: an overview and ways to increase this indicator will help reduce the financial burden of maintenance.
Causes of the decrease in the efficiency of heating boilers
Even before you increase the efficiency of the heating battery, you need to determine this parameter. In fact, it consists of several components. the efficiency of the boiler, radiators and pipelines. But in addition it is necessary to take into account the value of heat losses of the building.
Therefore, you should not think first. how to increase the efficiency of the radiator, and improve the thermal insulation of the house. Only after reducing losses through walls and windows can you begin to upgrade the heating. It is mistakenly believed that the main indicator of the system is the efficiency of gas heating boilers or their solid fuel counterparts. However, in fact the beneficial effect of the system is determined by the following formula:
Where Q. efficiency factor, Vpotr. amount of energy spent on heating the coolant, Vpost. the actual heat transfer to the air in the room.
When analyzing the operation of the boiler, especially the gas type, it can be seen that it does not work all the time. It should maintain the level of heating the coolant at the set thermal regime.
For the transfer of energy are responsible other elements of the system. pipelines and radiators.
It is them in the first place you need to pay attention, because the efficiency of the heating system by 80% depends on their correct operation.
What you need to do to make this index initially was the maximum:
- Choose the low-temperature mode of operation. With a minimum difference in heating water after the boiler and in the return pipe, energy costs will decrease;
- Use electronic control systems. thermometers and programmers. They will allow you to automatically change the work of the boiler when the temperature fluctuates in the house and outside;
- Carry out the modernization of elements to reach the maximum efficiency of heating in the house.
All these methods are interconnected with each other. Therefore, when organizing heating it is necessary to go professionally to each stage.
Methods to improve the efficiency of the boiler
Actual efficiency figures for different types of boilers
The first step is to choose the right type of heating equipment. The determining factors for the organization of heating with high efficiency are the type of fuel used and the boiler capacity. The models that work on gas prove to be the best.
As can be seen from the graph, there is no significant difference in the operation of the boiler in normal mode. Difference in efficiency for gas-fired heating boilers occurs only at the time of start-up to achieve the required temperature regime (50-70 ° C). Then there is a stabilization of operation and efficiency indicator. But the following steps can be taken to improve the latter:
- The difference between the calculated and actual capacity of the boiler should not be more than 15%. Exceeding the value will lead to incomplete combustion of gases, which will further increase fuel consumption;
- Using the condensation factor. This will slightly increase the efficiency of the entire heating system. However, the cost of condensing boilers will differ from traditional boilers by 35-40%;
- Reducing heat loss through the chimney. The increase in the efficiency of the heating battery is directly dependent on this factor.
Operation of the cast iron radiator through the thermal
By fulfilling these conditions you can increase the efficiency of heating devices by 1-1.5%. But it is best to initially purchase a suitable cat model, which best matches the parameters of the entire system.
Rules for connecting the radiators and their modernization
The most interesting are the other elements. the radiators and pipes. To increase the efficiency of the heating battery, you must initially correctly select the appropriate model. Ideally, it should have the maximum rate of thermal conductivity. This applies to aluminum and bimetallic batteries.
If we take the efficiency of heating radiators. the table will show significant differences from cast iron radiators. However, it should be taken into account that the cooling of aluminum will be much faster. This material does not accumulate heat. In addition, in cast-iron ones there is an uneven distribution of the energy received.
Characteristics of heat output of radiators depending on the degree of water heating
Baseboard Radiators Not Heating Room Up
For comparison, you can consider the table of efficiency of heating radiators of steel type.
The larger the area of the battery. the faster the air in the room will be heated. But it is necessary to take into account the degree of cooling of the coolant. It is desirable that the temperature operation of radiators in the house is the same.
Methods of connection of radiators
Changing the efficiency of the radiator depending on the way of connection
Having determined this parameter we can go to the basic nuances of increasing the efficiency of the radiator. The main one is the method of connection to the system. It is best to make a connection to the system on one side of the device. Then the coolant will pass a full cycle through the battery.
Putting Hot Water Boilers in Series to Increase Output. Boiling Point
But in practice it is not always possible to do this. Therefore, prefer to choose the “golden mean”. the upper supply and the lower connection to the return pipe. This method has the following advantages:
- It is possible to increase the efficiency of radiator by other ways, compensating 2%;
- Optimal length of the main, which also affects the efficiency of the entire system;
- The possibility of installing a cocks Maevsky and automatic thermostat.
Such a scheme is relevant for systems with both upper and lower distribution of pipes. But in addition to this, in order to increase the efficiency of the heating battery it is necessary to perform its installation properly.
Installation of radiators for maximum efficiency
The value of the coefficient for different variants of radiators installation
The main rule of installing radiators of any type is the optimal heating of the room. Т.е. They should be placed in the area of the room where the heat loss is greatest. This applies first and foremost to window constructions.
Installing the gas boiler with your own hands
Low-power boilers are regulated by a one-stage principle, medium-power units. by a two-stage. High-performance ones usually include modulated regulation of power. Boilers of closed type work on a ventilated draught.
There are also natural draught gas boilers. open type, or atmospheric. Installation of gas in a private home is made either by mounting on the wall or on the floor.
Ways to increase efficiency
In order for the heating system to work with minimal heat loss, you should familiarize yourself with effective ways to improve the efficiency of the gas boiler. To this end, it is necessary to exclude all types of heat loss as much as possible.
- To reduce the percentage of physical underburning, you should monitor the condition and cleanliness of the flame tubes and the water circuit. Soot builds up on the piping and scale builds up on the circuit, so these elements of the heating system require regular cleaning.
- There must not be any excess air in the gas boiler, because together with the air goes to the chimney and the heat that could be used to heat the coolant. This problem can be solved by installing a draught limiter on the chimney.
Please note! Owners of private homes very often make mistakes by periodically draining the coolant from the system. You should not do this, even once a year, even for prevention. The fact that the water in the system comes untreated. When it heats up and passes through the pipes, precipitation falls out, and this is the main cause of scale formation on the walls of the pipeline.
If you are looking for options on how to improve the efficiency of the gas boiler, pay attention to what kind of chimney is installed. Traditional diverting pipes have a number of disadvantages, the main of which is the dependence on weather conditions. An alternative to a conventional chimney can be a coaxial chimney, which has such advantages:
- Significantly increases the efficiency of the gas boiler;
- Resistant to high temperatures;
- can be made in different versions;
- allows you to save fuel;
- Provides long-term maintenance of the temperature in the room.
Coaxial chimney arrangement does not require much effort. The design consists of two discharge pipes of different diameters, one transports waste gases, the other. oxygenated air.
If you have no experience with heating equipment, but need to solve the problem, how to improve the efficiency of gas boiler, contact the experts. They will perform the work at the highest level, providing the most efficient operation of the heating system of your home.
How to increase the capacity of the boiler
The use of boilers of different types is especially important for rural areas, where there is no centralized heating system and sewerage. At the moment, the cost of the heating boiler of average capacity is affordable to most residents of our country. With proper care, the boiler will not be a substitute device, especially in winter, when it is very important to maintain a comfortable temperature in the room.
Before you start using it, familiarize yourself thoroughly with the principle of operation of the boiler. And continue to use it as efficiently as possible. In the market there are many energy-saving boilers that will not only heat your home, but also save you money. The main parameter you should pay attention to when buying is the boiler capacity.
Today, technology has evolved so much that you can increase the capacity of gas boiler to 2 MW without major repairs and removal of the boiler from the heating system of the building. Entrust the procedure to increase the power to experienced professionals, and they will in the shortest possible time do all the work at the highest level. After that you will experience significant financial savings, because the maintenance of the boiler will cost 15. 20% less money each month than it was before the modernization. The design of most boilers available in the domestic market, provides long and stable operation of the heating system at the calculated parameters. Install a special converter unit, and after a while you will clearly see how it saves you time and money.
In order to calculate the power of boilers properly, take into account the thickness of the walls of the heated room, its height and type. Also find out the possible heat loss and the number of windows. After carrying out all the above procedures, you will not have much difficulty to calculate the capacity of the heating boiler. Based on these figures, choose on the market or in a specialized store, the type of boiler that best suits all the parameters of your room. Monitor the functional state of the boiler throughout its operation, and then you and your family will always be warm and cozy. It is very important to maintain a comfortable temperature and in industrial enterprises, because it affects the health of workers and the good performance of their direct duties.