Is your Boiler a Condencing Boiler

An essential question to ask when picking a boiler is my boiler is condensing Boiler , Condensing boilers are much more energy efficient than conventional boilers which means switching to a condensing boiler can significantly lower your fuel bills.

Today, using a condensing boiler in new buildings is almost the standard, because boiler and heating system can be perfectly matched right from the start. A condensing boiler brings the most benefit when it is installed in heating systems with low system temperatures. Condensing technology can save up to 30 percent of heating costs, even

Gas Condencing Boiler 

in modernisation projects.

The Vitocrossal 300 gas condensing Boiler from Viessmann is the right solution for any application – including providing heating in apartment blocks, as well as in public and

commercial buildings.

Condensing boilers recover waste heat that would normally be lost through the flue. Condensing boilers are able to do this because they have a much larger and more efficient heat exchanger than those found in traditional boilers; this maximises the amount of usable heat produced by the burner.

A heat exchanger enables the transfer of heat from one source to another over a solid surface, in a condensing boiler this includes heat from the flue gases which is used to heat water that is returning to the boiler from radiators.

Because the flue gases are not as hot as those in a non-condensing boiler, a condensing boiler needs a different type of flue. In a traditional boiler the high temperatures cause the flue gases to rise in the same way as smoke does through a chimney. A modern balanced flue has 2 pipes, one inside the other. One pipe draws in air from the outside to aid combustion, and the other dispels the gases.

A condensing boiler has a much shorter flue than a non-condensing model, which means that it is often best to site a condensing boiler against an outside wall. It is worth noting that because condensing boiler flue gases are not as hot, they do not rise as quickly which means that the plume from the flue can be a nuisance if it is expelled across a pathway or access point.

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Infinite Solar Energy Reserves

The global energy situation is characterized By finite natural gas and mineral oil reserves, simultaneously increasing consumption and drastically rising prices. Furthermore, ever increasing CO emissions are heating up the atmosphere, leading to dangerous climate change. This forces us to handle energy

Responsibly. We need greater efficiency and an increase in the use of renewable. The heating sector is the largest consumer of energy. It can therefore make a major contribution towards essential energy.

Savings and CO reduction through the use of innovative and efficient heating technology. The comprehensive product range from Viessmann includes system solutions for every type of energy that keep the use of resources for reliable and convenient heat provision to a minimum and protect the environment through a reduction of CO emissions. Whether with a condensing boiler for oil or gas, with a pellet  boiler or heat pump – the ideal supplement to every heat source is a solar thermal system for DHW heating and central heating backup.A solar thermal system can provide approx. 60% of the energy required each year for heating domestic hot water. Solar thermal systems that can also provide central heating backup reduce energy costs further still. Such systems can save up to 35% of the annual costs for DHW and central heating. The integration of solar thermal systems requires precisely matched individual components to achieve optimum heat yield and to keep costs under control. This must be Supported by the right system engineering.

Viessmann began the development and manufacture of powerful systems for the utilization of solar energy more than 30 years ago, and can therefore call on extensive experience.

The energy of the sun can be utilised actively or passively. With passive utilisation of solar energy, radiation is utilised directly (e.g. windows, conservatory), in other words without technical aids.

Various technologies are available for active utilization of solar energy. Apart from generating heat (solar heating), the sun can also be used to generate power (photovoltaic). One principle of the thermal utilization of solar energy is the level of insolation that is available on Earth. This depends on the season, location and the utilization area.

The collector (Latin: collegere = to collect) is the essential component required for the utilisation of insolation. In this section it is shown with its essential parameters. By connecting various additional components, a solar thermal system can be created that can be operated in different modes.

How Biological Treatment Works

Biological growth

Biological growth, similar to that found in percolating filters, grows on the discs' surfaces. An aerobic, freely circulating bio-mass is found in the rotor basins, which contributes to the biological treatment of the wastewater.
Bio-degradable organic wastes are therefore being treated by both the intermittently submerged bio-mass growing on the discs, and the suspended bio-mass present in the basin.

The rotating motion of the rotor discs create turbulence in the basin, keeping the free biomass aerated and in constant suspension until it eventually leaves with the treated effluent for secondary settling in the Clarifier (Humus Settling Tank).

Oxidation, Generation and De-generation of Biological Growth

The oxygen required for the oxidation process is absorbed through the wet upper surfaces of the bio-mass growing on the discs while it is passing through the atmosphere.
Full oxygen absorption is immediately achieved due to the large contact area of the disc surfaces and the oxygen freely available in the atmosphere above the plant.

The continuous absorption of oxygen by the bio-mass allows the oxygen to penetrate effectively to the deepest parts of the bio-mass, mainly by diffusion. The immediate submersion of the rotating, oxygen saturated bio-mass causes part of the absorbed oxygen to be transferred to the suspended bio-mass in the basin. Therefore, the absorption of oxygen into the process is not through direct absorption of air by the wastewater, but rather almost exclusively through the absorption of oxygen on the wet surfaces of the bio-mass growing on the disc.

The oxygen absorption is so effective that despite the fact the oxygen is absorbed by both the disc bio-mass growth and by those suspended in the basin, over 2mg/L of oxygen is still present in the liquid leaving the Rotating Disc stage.

Since the waste substances present in the liquid are constantly converted into harmless substances, all bio-mass within the rotor unit is continually increasing. The excess bio-mass is automatically removed from the Rotating Disc stage by the flow of the wastewater through the plant.

Sludge thus produced is removed from the treated effluent by further settling in the Clarifier, which directly follows the Rotating Disc stage.