Abstract
To reduce carbon and greenhouse gas emissions, the more efficient and environmentally friendly energy production in the building sector is required. The deployment of renewable energy based microcogeneration units in the decentralized hybrid energy systems is a part of the solution. The micro combined heat and power (micro-CHP), or co-generation, units produce simultaneously heat and electricity from a single fuel source at high efficiency and close to the consumption point. These units offer significant benefits: reduced primary energy consumption, reduced CO2 emissions, and avoidance of distribution losses due to central plant and network construction. The objective of this paper is to present a review of available renewable energy based micro-CHP systems and to focus on the biomass and solar based conversion devices. Finally, a novel hybrid renewable energy system is presented by coupling renewable energy sources, such as solar and biomass for micro-CHP.
Highlights
The building sector has a high impact on greenhouse gas emissions and final energy consumption in the European Union (EU) by being the largest energy end-use sector with a share of 41%
They found that the focus should be in the organic Rankine cycle (ORC)-evaporator design and how the primary energy is transferred to the power cycle to meet the variable thermal load
Wang et al [20] studied thermos-economic feasibility of a hybrid solar-biomass cogeneration system based on flat plate type PVT collectors and biomassfuelled ORC micro-CHP system integrated with thermal storage for a sport-centre application
Summary
The building sector has a high impact on greenhouse gas emissions and final energy consumption in the European Union (EU) by being the largest energy end-use sector with a share of 41%. [1] The micro combined heat and power (micro-CHP), or co-generation, units produce simultaneously heat and electricity from a single fuel source at high efficiency and close to the consumption point. [2] Micro-CHP systems are operating in the building sector to produce on-site energy for space heating, domestic hot water and electricity demand. In 2017, Martinez et al [3] published a review article of micro-CHP systems based on renewable energy sources. The work presented different micro-CHP conversion technologies and used fuels They focused on the solar energy-based technologies and presented shortly the main micro-CHP systems that coupled renewable energy sources. In 2020, Cheekatamarla et al [9] presented a review article on the modelling of the micro-CHP system with a focus on combustion engine as a prime mover. They found out that the Annex 42 [10] model was the most used modelling approach. Hybrid renewable energy systems are discussed, and a novel system is presented by coupling renewable energy sources
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