Hydrogen from renewables can help tackle various critical energy challenges. It could particularly offer ways to decarbonise a range of sectors where it is proving difficult to meaningfully reduce CO2 emissions, a new report by the International Renewable Energy Agency (IRENA) on Hydrogen: a renewable energy perspective finds.

As world leaders gather in New York to discuss climate action solutions, IRENA contributed to building a community of stakeholders that look at the emerging solution of clean hydrogen. Led by the World Economy Forum (WEF), the initiative aims to explore the role of hydrogen in the energy transition and advance on the clean hydrogen agenda. At a side event hosted by WEF, IRENA presented key findings of its new report and emphasized the expected growing role of renewables-based hydrogen in the future energy mix. IRENA projects an 8% share of total global final energy consumption to be attributed to hydrogen by 2050.
Decarbonisation impacts depends on how hydrogen is produced. Current and future sourcing options can be divided into grey (fossil fuel-based), blue (fossil fuel-based production with carbon capture, utilisation and storage) and green (renewables-based) hydrogen. With massively falling cost of renewables, the potential of green hydrogen particularly for so called ‘hard-to-decarbonise’ sectors and energy-intensive industries like iron and steel, chemicals, shipping and aviation would become more compelling given the urgency to limit CO2 emissions. In that context, IRENA also supports the work of the “Getting to Zero 2030 Coalition” to achieve carbon emissions cuts in the global shipping sector by 2030.
However, deployment of hydrogen-based solutions will not happen overnight, IRENA’s new report cautions. Hydrogen might likely trail other strategies such as electrification of end-use sectors, and its use will target specific applications. The need for a dedicated new supply infrastructure may also limit hydrogen use to certain countries that decide to follow this strategy. While renewable energy and energy efficiency are immediately ready to be deployed at large-scale, hydrogen in combination with renewables could represent a complementary solution in the long run.
Download IRENA’s report Hydrogen: a renewable energy perspective.
Source: IRENA
























„Groundwaters that are not too ’aggressive’ or murky we can use directly in heat pumps. But with aggressive water which happens to be loaded with Sulphur and metal residues such as manganese or iron, we put the interchanger into the pumps. River and lake water we can also use – where in the coldest days the water temperature doesn’t exceed 1°C or the water even gets frozen. In those pumps, we utilize different exchangers, and that is a nice and appealing solution. Anyway, there is a solution to every type of water. Still, we might say that heat pump water-to-water is the most efficient”, explains Sasa adding that there is also a subtype of this pump. “The most interesting is wastewater, and the Germans are the first who started using it for generating electricity. In two buildings we installed pumps which use waste water. In the spa centre in Mladenovac we built in a system for the use of wastewater coming from showers and other sanitary ware. The pump capacity is 300 kW, and this energy is used for heating the sanitary water for the whole building, so ten times less energy is consumed in comparison with other energy sources. That way, the users can pay off the investment faster.”














One production plant has saved almost half of the electricity consumption in the day of the largest production thanks to the solar power plant on the roof of the facility. Out of 950 kWh consumed, it saved about 450.