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What is a Combi Boilers (Combination Boilers)
A combi boiler is a type of boiler that combines the features of a water tube boiler and a smoke tube boiler. Water tube boilers are more efficient than smoke tube boilers, but they are also more expensive. Combi boilers offer the best of both worlds, as they are both efficient and affordable.
Combi boilers are commonly used in India in a variety of industries, including:
- Rice mills: Rice mills use combi boilers to generate steam for cooking the rice.
- Sugar mills: Sugar mills use combi boilers to generate steam for processing the sugarcane.
- Rubber industries: Rubber industries use combi boilers to generate steam for vulcanizing the rubber.
- Textile industries: Textile industries use combi boilers to generate steam for dyeing and finishing the fabric.
Combi boilers are a versatile and efficient way to generate steam for industrial applications. They are becoming increasingly popular in India as businesses look for ways to improve their efficiency and reduce their costs.
How Water Tubes Are Utilized in Combi Boilers
Water tubes are used to generate steam in combi boilers. The water tubes are located in the furnace of the boiler, where they are heated by the hot gases from the combustion of fuel. The water tubes then circulate the heated water throughout the boiler, where it is converted into steam.
The water tubes in a combi boiler are typically made of steel or copper. They are thin-walled and have a high surface area to volume ratio, which allows for efficient heat transfer from the hot gases to the water. The water tubes are also arranged in a way that maximizes the heat transfer surface area.
The use of water tubes in combi boilers makes them more efficient than traditional fire tube boilers. Fire tube boilers have tubes that carry hot gases from the furnace through the water, which is less efficient than having the water tubes directly in the furnace.
Here are the specific ways in which water tubes are utilized in combi boilers:
- Heat transfer: The water tubes are the primary means of heat transfer in a combi boiler. The hot gases from the combustion of fuel flow through the water tubes, transferring their heat to the water. The heated water then circulates throughout the boiler, where it is converted into steam.
- Steam generation: The water tubes are also responsible for generating steam in a combi boiler. The heated water in the water tubes boils and turns into steam. The steam is then collected in the steam drum, where it is ready to be used for heating, power generation, or other applications.
- Circulation: The water tubes also help to circulate the water in a combi boiler. The heated water in the water tubes rises to the top of the boiler, while the cooler water falls to the bottom. This circulation helps to ensure that the water in the boiler is evenly heated.
Overall, water tubes play an essential role in the operation of combi boilers. They are responsible for heat transfer, steam generation, and circulation. The use of water tubes makes combi boilers more efficient and effective than traditional fire tube boilers.
How a Combi Boiler Works
Thermodyne Engineering Systems has a vast experience in manufacturing Combi Boilers. Our Combitherm models and Ultra models are both classified under Combi Boilers. Generally, the design of a Combi Boiler is an amalgamation of both Water wall (Membrane) as well as Shell and tube design.
Water wall acts as a furnace enclosure where combustion of fuel takes place. Here the tubes surround the furnace and water flows inside membrane tubes. The fuel is fed on the grates of the furnace and air is supplied through the Forced Draft Fan below the grates and as the fuel comes in contact with air and heat, combustion process takes place.
This is the zone where the maximum radiation heat transfer takes place between the flue gases and the water. After the combustion process, flue gases enter the shell and tube zone where flue gases travel through high velocity inside the tubes and water is on the shell side. This is the zone where convection heat transfer takes place between the flue gases and the water.
The basic difference between our Combitherm Model and the Ultra Model is that the shell in cases of Combitherm Model is placed in series with the membrane while in case of Ultra model, the shell is placed above the membrane and therefore Ultra has a smaller footprint as compared to the Combitherm Model.
Also Read: Packaged Boilers
Our Combi boilers are the most efficient boilers in terms of cost savings and fuels savings. Their unique water wall membrane and smoke tube shell have the benefits of both water tube boiler as well as the smoke tube boiler and so it has a combined feature of both of these designs. Our high furnace volume in Combi Boilers extracts maximum radiation heat from the flue gases at high temperatures while at low temperatures high velocity of flue gases is responsible for extracting maximum convection heat.
Also Read: Biomass Biofuel Boiler
During its course of motion, it transfers heat to the –
- Water present in the tubes in the Water Wall Membrane
- Water present in the Boiler shell through tubes
This type of steam boiler offers a high degree of reliability and trouble-free operation. They effectively operate at moderately high pressures and steam flow capacities, unlike packaged type smoke tube boilers.
Combi Boilers for Sale in India
Combi type of steam boiler offers a high degree of reliability and trouble-free operation. Combi Boilers effectively operate at moderately high pressures and steam flow capacities, unlike packaged type smoke tube boilers.
Combi Boiler’s Capacity Range
Thermodyne Boilers manufacture High Efficient Combi Boilers of various capacity ranges as mentioned below:-
Capacity: 1TPH – 20 TPH
Pressure: 10.54 Kg/cm2 to 32 Kg/cm2
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Also Read: Smoke Cum Water Tube Boiler
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Combination Boiler Work in Industries FAQ
A combi boiler is a type of boiler that provides both heating and hot water for a home or business. It is a compact and efficient unit that can be installed in a variety of locations, making it a popular choice for both new and retrofit applications.
Combi boilers are highly efficient because they use the heat generated from the combustion process to heat both the water for your central heating system and the water for your hot taps. This means that there is no wasted heat, which can save you money on your energy bills.
The cost of a combi boiler will vary depending on the size and type of boiler you choose, as well as the installer you use. However, combi boilers are generally more affordable than other types of boilers, such as traditional hot water tanks.
There are many benefits to using a combi boiler, including:
Efficiency: Combi boilers are highly efficient, which can save you money on your energy bills.
Compact size: Combi boilers are compact and easy to install, making them a good choice for small spaces.
Flexibility: Combi boilers can provide both heating and hot water, which gives you more flexibility in how you use your energy.
Reliability: Combi boilers are reliable and easy to maintain, which can save you money in the long run.
There are a few drawbacks to using a combi boiler, including:
Power outages: If there is a power outage, your combi boiler will not work.
Water pressure: Combi boilers can have lower water pressure than other types of boilers, which can be a problem for homes with multiple showers or baths.
Noise: Combi boilers can be noisy, especially when they are first turned on.
When choosing a combi boiler, it is important to consider the following factors:
The size of your home or business: Combi boilers are available in a variety of sizes, so it is important to choose one that is large enough to meet your needs.
The type of fuel you use: Combi boilers can be powered by natural gas, propane, or electricity. Choose the type of fuel that is most convenient and affordable for you.
Your budget: Combi boilers can range in price from a few hundred dollars to several thousand dollars. Choose a boiler that fits your budget and your needs.
Combi boilers can be installed by a qualified plumber or heating contractor. The installation process will vary depending on the type of boiler you choose and the location of your installation.
Combi boilers require regular maintenance to keep them running efficiently and prevent problems. You should have your boiler serviced by a qualified technician at least once a year.
Some common problems with combi boilers include:
Low water pressure: This can be caused by a number of factors, such as a clogged filter or a faulty pump.
Noise: This can be caused by a number of factors, such as a faulty fan or a loose pipe.
Carbon monoxide leaks: This is a serious problem that can be caused by a faulty boiler. If you suspect a carbon monoxide leak, evacuate your home and call a qualified technician immediately.
Combi boilers have a number of safety features to protect you and your home, including:
Automatic shut-off: If the boiler overheats or detects a fault, it will automatically shut off.
Carbon monoxide detectors: Some combi boilers have built-in carbon monoxide detectors.
Pressure relief valves: If the boiler pressure gets too high, the pressure relief valve will open and release the excess pressure.
Boiler Application Links
- Boiler Losses That Eat Away Your Profits
- Dissolved Gases in Feed Water and Its Effect
- Pressure Reduction System
- How to minimize the Blowdown Losses
- Combitherm Ultra Boilers : Combi Ultra Boiler
