Boiler replacements discovering the best match

Stuart Turner of Hamworthy Heating takes a look at the replacement of boilers in commercial buildings and why a straight swap-in swap-out solution does not always present best value for money.It sounds easy however all too often developing owners/operators do not understand their existing energy expenses and gas consumption.When I go to a site to take a look at heating or hot-water systems I ask two concerns.

What does the equipment supply?

Have you ever lost warm water?

This helps to determine if there have been changes in the structure being provided and whether there is a have to decrease or enhance the size and number of set up boilers or hot water heater.A school I checked out to review their boilers was a classic example of why you cannot simply change without examining the present situation. The school had 2 1500 l calorifiers being heated by a 400 kW boiler. When I enquired about what the calorifiers were supplying, the response was Four wash basins and a shower. It turned out the school had actually decentralized its plant space five years prior, but the main calorifiers had actually been left to run as previously. The school was able to remove the boiler and both calorifiers perhaps bad news for us, however the school is absolutely seeing the savings now!

Numerous older heating systems are running on two or three large-output steel shell boilers, particularly in huge buildings with high heat need. These boilers can provide the heat that is needed however might not be as economical as, state, seven or eight smaller sized output modular boilers.A heating system must deliver the right amount of heat at the correct time in the best place, otherwise energy is wasted. Using single or numerous boiler systems with high turndown ratio allows for closer load matching with resultant improvements in system running effectiveness, therefore decreasing gas usage and fuel expenses. Plus, overall emissions will be minimized due to less over-firing of the appliance.

Legislation will drive product option, however not system design.With the Energy Related Products Directive (ErP) now in force it is not possible to change climatic or non-condensing boilers like for like a condensing boiler will need to be installed. The ErP directive sets minimum requirements for items that use energy. Boilers as much as 400 kW need to satisfy the performance levels that are just attainable with a condensing boiler.

Exactly what the directive fails to identify is that condensing boilers only achieve these performances if installed, set up and controlled in the most efficient way. Simply puts they have to remain in a system where they are operating in condensing mode (return temperatures to be at less than 54 C for the boiler to actually begin to condense), otherwise they will only accomplish partially better performances than a high-efficiency non-condensing boiler.

But the benefits of modular boilers are not just financial. For the best building, modular boilers represent a safer and secure and versatile option. They are well matched to buildings with significantly variable heat demand such as schools and workplaces.Utilizing numerous boilers increases system security. The structure can still be heated adequately in the event of a module breakdown without putting the building at risk. This makes the modular option preferred in the health sector, which counts on heating and hot water to be able to operate safely. In the same vein, servicing modular boilers is much more hassle-free, as one module can be serviced while the others remain to fulfill the system need for heat.

Modular boilers have advantages for setup too, due to their versatile building and construction and size. Installing smaller modular boilers is physically easier than huge boilers, and continuous access and handling is not a problem, even in the most compact boiler spaces. Plus, for retrofit tasks they are often set up along with the existing boiler. This helps to make sure a smooth changeover from old to new with little or no system downtime.

We know it is rather possible to achieve real, tangible cost savings right away by updating boilers to newer more efficient, condensing modular boilers that can carefully match the heat need of a building. Teaming this up with the right control technique presents rather an attractive proposal to lower fuel bills and assist add to Government targets on lowering carbon emissions.

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May 15, 2016 10:31 AM
Plumming

When I go to a site to take a look at heating or hot-water systems I ask two concerns.

May 15, 2016 10:31 AM
Plumming

When I go to a site to take a look at heating or hot-water systems I ask two concerns.

May 15, 2016 10:31 AM
Plumming

When I go to a site to take a look at heating or hot-water systems I ask two concerns.