The fight against carbon dioxide (CO2) emissions and increasing the efficiency of heating systems lead to the fact that gas boilers will become irrelevant in the near future. How to heat homes without fossil fuels, read on.
Why gas boilers are harmful?
For several hundred years, mankind has been supplying transport and industry with fossil fuels: natural gas, oil and coal. These fuels are an important industrial and technological revolution, but they will not work forever for two reasons. If the effects of global warming are already being felt, then the limited amount of minerals is of little concern to the public at the moment..
HOW CENTRAL HEATING WORKS part 1. The history of central heating pipe layouts
More than a decade ago, the UK government passed the Climate Change Act. The essence of the regulation is that the level of carbon emissions in the UK should be reduced by 80% by 2050. To achieve this goal, the Minister allowed almost any measure, but the priority is to introduce technologies that replace environmentally harmful fuels..
An ad hoc committee has been set up to oversee the implementation of the task. The results are already there – in 2017 reduced carbon dioxide emissions by 43% compared to 1990 levels, but progress has stalled and now requires drastic measures. For example, a ban on the installation of gas boilers from 2025, a mandatory minimum energy efficiency requirement for any boiler at 92%.
Gas heating will become history
The UK National Grid has provided data according to which they are connected to the gas grid for heating. How to replace so many boilers?
The most likely solution seems to be a hydrogen grid. Hydrogen (H2) does not produce emissions during combustion, it generates only heat and water vapor. Hydrogen is an efficient fuel as it produces a large amount of energy − 1 kg of H2 gives the same amount of energy as 2.8 kg of gasoline.
How a hybrid heating system works
A hybrid is a simple installation that includes a combi boiler connected to radiators or underfloor heating, and an air-driven heat pump that is installed outside the home. The unit can be placed next to a hot water cylinder or solar thermal system.
However, low-carbon devices cannot be used otherwise…
Hydrogen network problems
H2 is considered hazardous because it is highly flammable. It also reduces carbon footprint. To eliminate this problem, it is necessary to separate methane in steam converters, which leads to additional costs.
Another significant problem is that it can be difficult for homeowners to explain the reasons for the need for boilers and even more difficult to get them to pay for the process. In order to use awareness, «advertising campaign», which demonstrates the advantages of hydrogen plants.
Solar thermal installations
In installations of this kind, solar energy is not used to convert it into electricity. As a result, the boiler works less, which reduces heating costs.
Solar thermal panels (collectors) are installed on the roof. The panels are made up of tubes of liquid that absorb heat from the sun. The heated liquid enters the house and the heat is transferred to the hot water tank through a heat exchanger. After that, hot water flows inside the pipes, as in a conventional heating system. Solar PV panels will generate electricity for these systems..
What homeowners should do
Unfortunately, there is no one-size-fits-all solution for every home. The technology that works best in a 5-room private home cannot be applied to a 2-bedroom terrace in the city center. You cannot expect that homeowners with low incomes can install a hybrid boiler without financial support from the state, guided only by the idea of a clean planet. Many unresolved problems hinder the introduction of new heating technologies, but the process has already been launched in 5-6 years, the UK will give an answer whether it is worth abandoning gas boilers.