Combination Boilers

 

Boiler

The boiler is a closed vessel in which water or another fluid is heated by direct energy application from the combustion of fuel, electric power, or nuclear energy, and then superheated or combined under pressure or vacuums for external use.

 

The boiler is a key component of the global power plant heating scheme?

•    The heat distribution, heat-emitting, and control systems operate with the boilers system.
•    A boiler is the major workpiece of thermal power plants.

Combi boiler

The combination of both Water Tube Boiler and Smoke Tube Boiler is the combination boiler or generally referred to as a Combi boiler.

The combined boilers in India are widely used and are suitable for steam production and use in various industries including the rice mills, sugar mills, the rubber industries and many more.

How does a combi boiler work?

Thermodyne Engineering Systems has extensive experience in the production of a combi boiler.

In general, a combi boiler is designed to fuse the wall of the water (membrane) and the shell and the tube design.

The wall of the water functions as a furnace enclosure, where fuel is burned. The pipes are around the oven and water is flowing through the membrane pipes here. The combustion process is carried out with the fuel supplied on the gates of the oven and using the Forced Draft Fan below the grates and when the fuel comes into contact with air and heat.

This is the area in which the full heat transfer from the flue gas to water takes place. Following combustion, the flue gas enters the shell and tube region, and the flue gas travels at high speed inside the pipes, with water on the core. This is the area where the heat transfer between the flue gas and the water is carried out. The boiler is a closed vessel in which water or another fluid is heated by direct energy application from the combustion of fuel, electric power, or nuclear energy, and then superheated or combined under pressure or vacuums for external use.

The fundamental distinction between the Combitherm model and the Ultra is that the shell is placed in a series with the membrane, while the shell is placed over the membrane for the ultra-model and hence, the Ultra is slightly smaller than the Combitherm model. Their shell is placed over the membrane.

Combi-based boilers are the most cost-effective and fuel-effective boiler. Their special water wall membrane and fumeshell have the advantage of both the water tube boiler and the fumeshell boiler, and both features are combined.

High furnace volume in Combi Boilers extracts maximum flue gas heat at high temperatures, while the high-speed flue gases extract the maximum heat convection at low temperatures.

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

The steam boiler of this type is very reliable and easy to use. In contrast to packaged smoke tube boilers, they work effectively at moderately high pressures and steam flow capacity.

Combi boiler’s capacity range

Thermodyne Boilers produce high-efficiency combination boilers of different capacities, as described below.

Capacity: 1TPH – 20 TPH

Pressure: 10.54 Kg/cm2 to 32 Kg/cm2

What is condensing technology?

Building regulations in the UK now require all gas combi boilers to incorporate condensing technology. These rules were introduced to help homeowners benefit from dramatically increased efficiency. With older boilers, as much as 50% of heat energy was lost as the combustion gasses escaped into the flue, taking their heat with them. In a condensing boiler, on the other hand, the heat contained within the combustion gasses is captured within the system and used to preheat cold water as it enters the system.

Condensing technology helps to protect the environment as it reduces your home’s carbon footprint by reducing CO2 emissions. It can also save you a lot of money on your fuel bills by making better use of your energy.

Choosing the right combi boiler

What size combi boiler do I need?

There are several factors to consider when deciding which size gas combi boiler to buy. The most important factors are generally how much demand there is likely to be for hot water and how many radiators you will be heating.

As a rule, a 20-35kW combi boiler will generally be sufficient for an average 3–4-bedroom house, whilst those with ensuite bathrooms may find that a 30-35kW boiler is more suitable. Much bigger houses will typically need a larger 35-42kW boiler, although it may be worth considering a system boiler as an alternative.

What else should I consider when choosing a combi boiler?

When choosing a gas combi boiler, it is also worth considering what options are available to control your heating. Many of the latest boilers have computerized controls and new generation thermostats that can help you maximize efficiency and save money on your heating bills.

Also, think about whether you’d like to have access to smart functionality, which allows you to control your heating remotely, usually from an app on your smartphone.

What is the typical lifespan of a combi boiler?

These boilers can differ widely in terms of their quality and longevity, and it’s important to be aware of this when you’re searching for a new model for your home. Saving money in the short term by opting for the cheapest model you can find may ultimately end up costing you more if the boiler you choose isn’t made to a high standard.

Generally speaking, you can expect modern boilers to last for around 15 years, or potentially even longer if you get a good quality model and service it regularly. To work effectively, combi boilers need to operate at the correct pressure. If the pressure is too low, your boiler may not heat your home properly, while if it’s too high, there might be a problem in the system that could cause serious damage if left unresolved. Most gas boilers have an operating pressure of 1-1.5 bar, and this is usually shown on the pressure gauge as a green zone.

By Shubham Handibag, Harsh Mehta, Harshvardhan Kolekar, Harshwardhan Thakare, Shridhnyan Haval