• Energy Research
• 2018 close

The project arises from a joint venture between Enair Energy SL and Lancor 2000 S Coop to develop a Cost efficient Small Wind Turbine (SWT) of 40 kW rated capacity (ECIWIND®).Within the wind energy sector, the small wind power is growing: According to World Wind Energy Association the small wind power market is expected to increase massively, from 768 M€ in 2013 to 2517 M€ by 2020, at a CAGR of 22%.The main challenge of the small wind energy industry is to decrease its costs to push a socialisation of this renewable technology. Thus, this electricity generation will be more competitive in the energy market and independent of the subsidies. The European Commision highliths the importance of Small and Medium Enterprises (SMEs) as small energy producers and the need to empower them to take up this role. Several european SMEs such as farms (200-400 kWh/day) and small industry (200- 450 kWh/day). In the case that these end users are located in areas where annual average wind velocity is higher than 5 m/s, small wind turbines in the 10-50 kW capacity is the best option to cover their energy needs. The acquisition and commissioning costs of SWT in this capacity range rounds 4000 €/kWh and have annual maintenance average costs of 1500 €/year depending on the configuration, which makes unaffordable the investment without government subsidies. The price reduction on this capacity range can be approached through the elimination of costly parts of current technologies as the Gearbox, and the optimization of the cost/performance of the rest of components.Enair and Lancor have therefore identified a business opportunity for SWT technologies and have developed a first prototype of ECIWIND® at 10 kW scale (free-gearbox with pitch control and permanent magnet generator SWT) that requires 50% less maintenance and decrease the price to end user installed in 40%, which entails an investment payback period <6 years without any government subsidy.

Energy storage technologies have long been a subject of great interest to both academia and industry. The aim of this project is to develop a novel, cost effective and high performance Latent Heat Thermal Energy Storage System (LHTESS) for seasonal accumulation of solar energy in increased quantities. The major barrier for currently used Phase Change Materials (PCMs, organic and hydrated salts) is their very low heat conduction coefficient, low density, chemical instability and tendency to sub-cooling. Such inferior thermo-physical properties result in the LHTESS having large dimensions and not having a capacity to provide the necessary rate of heat re-charge and discharge, even with highly developed heat exchangers. The new approach to overcome the above issues is the deployment of low grade, eutectic low melting temperature metallic alloys (ELMTAs). The ELMTAs are currently produced for application in other areas and have not been actively considered for the thermal energy accumulation with the exception of very limited studies. Their heat conduction is two orders of magnitude greater than that of conventional PCMs, they are stable and provide the thermal storage capacity which is 2-3 times greater per unit of volume. The project consists of both theoretical and experimental investigations. A range of low grade ELMTAs for application in LHTESS will be selected and Differential Scanning Calorimetry will be used to measure their thermal properties. Thermal cycling tests of such alloys will be conducted. Numerical investigations of heat transfer and flow in the LHTESS with ELMTAs will be performed. Experimental studies of heat transfer and flow in a laboratory prototype of the LHTESS with ELMTAs will be conducted. As outcomes of investigations, dimensionless heat transfer correlations will be derived and design recommendations for a practical solar energy seasonal LHTESS with the low grade ELMTA will be produced for project industrial partner

The aim of this project is to develop, and to demonstrate, a novel real-time monitoring system to detect in-service degradation in offshore wind turbine support structures using ultrasonic guided waves. This system uses active sonic/ultrasonic waves to cover the whole volume of concern to detect fatigue cracking at welds, and possibly at other locations, in the pile and transition piece. Fatigue performance of current structures is estimated by extrapolation from potentially unrepresentative data, so the possibility exists of cracking before the end of the design life. There may be over 1km of weld in the entire structure and potential sites of cracking may not be easily predicted, so that any monitoring system must be capable of crack detection over a large volume of material. The method will allow cracks to be detected across a large volume of material and is expected to save considerable costs of local examination of welds, especially when these are underwater and/or around the mud line. The project will develop designs of sensors, monitoring procedures and electronics and will be demonstrated on a structure offshore.

A hybrid solar panel that maximises heat capture and electricity generation. Although solar panel technology is well established, commercial hybrid panels are a recent innovation. A typical PV panel transforms ~20% of incident solar irradiance into electricity – and a thermal panel several times that, into heat. Between the two, there are trade-offs; and the detailed economics – factoring in power prices and other heating costs, etc. – can be very complex. In the end, however, people/businesses need continuous electricity and regular hot water. There is clear need for a solution that delivers both: hence the development and uptake of hybrid panels. The battle is to establish technology (efficiency) leadership – which EndeF has achieved in ECOMESH: the most efficient panel ever built. At the core of the innovation is ECOMESH’s Transparent Insulating Cover (TIC) technology: an advanced heat recovery system which, using an inert gas layer, maximises heat capture. TIC also increases electricity generation by 15%, by cooling the PV cells to their optimum operating temperature.

This project aims at a cost-effective efficiency enhancement of Si solar cells towards their theoretical maximum of about 29% by moving away from the diffused-junction paradigm. This will reduce the energy fabrication costs on the €/kWh level and thereby increase the competiveness and profitability of photovoltaic systems. Crystalline Si (c-Si) solar cells are since decades the most established photovoltaic technology. Their main advantages are long lifetime (>25 years), non-toxicity and the high abundance of Si. However, for full competitiveness with traditional sources of electricity, important new steps need to be taken to increase their performance. An innovative contacting scheme will be developed that eliminates the main loss mechanisms in c-Si solar cells arising from doped pn-junctions and the direct contact of metal with Si. The novel contacts will be broadband optically transparent, generate a highly passivating and carrier-selective interface to Si and will enable solar cells without doped pn-junctions. No cost-intensive patterning technique is required for the device fabrication and parasitic optical absorption, as present in Si heterojunction solar cells, will be minimized. The novel contacts consist of three layers: a 1-2 nm thick tunnelling SiO2 layer for chemical passivation of the Si surface, a wide-bandgap conductive metal oxide layer providing a specific energy band alignment, and a highly conductive transparent oxide (TCO) for carrier transport to external metal contacts and optimum light coupling into the solar cell device. The contacts will be used for the fabrication of Si solar cells which are devoid of doped pn-junctions and achieve both high open-circuit voltages and photo currents. The structure of the photovoltaic device will be optimized for the application in regular 1-sun modules and for both III-V/Si and perovskite/Si tandem cell applications with potential for flat-plate efficiencies well above 30%.