About urbane wind turbine investment


About urbane wind turbine investment

These costs consist of: comprehensive UWT installation such as the engineering, security measures, monitoring, supporting building, transport and mounting, proof of operation (commissioning) and the acceptance. Likely extra charges will arise from:


feasibility studies, location selection, structural assessments (if mounting the turbine on a building), getting permits and project management. In order to at least partially examine the investment costs of the distinct turbines, the expense per kW installed has been calculated. The figure offered is the outcome of: (total investment – remaining value right after ten years) / nominal capacity.


The remaining value has been estimated as 20% of the investment for all turbines except for Ropatec. This is due to the fact the manufacturer of Ropatec guarantees to purchase back his turbine following ten years for a fixed price. Even so, it should be noted that all costs are estimates at the time of publication and could modify.


Also, all calculations are only indicative, as the separately charged charges can not be estimated and the efficiency figures provided by the suppliers and companies have not been verified in practice. For that reason, although these figures supply a rough guide to expenses, further investigation on an individual project basis is essential.


four.1.2 Periodic costs

The periodic charges incorporate upkeep, part replacements, transport fees related to the on-website operate, the achievable insurance coverage charges (including the third celebration harm liability), the costs of any equipment replacements and the cost of a comprehensive check of the method right after 10 years of operation. Once again, these costs have been estimated on the basis of info from suppliers and companies and ought to be treated as indicative costs only.


four.two Advantages

four.two.1 Financial incentives

The monetary incentives accessible differ amongst the Netherlands and the UK.

The Netherlands: E.I.A. – Power Investment Deduction for profit-making organisations: it is achievable to receive the E.I.A. with a maximum of euro 5000 per turbine for turbines with a nominal power


M.E.P. – Electrical energy Generation Environmental High quality: applies to the total energy generated by a renewable power installation. The level of the M.E.P. subsidy per kWh is set by the government and laid out in the Ministerial grant scheme regulation.


UK: A grant can be obtained from the Low Carbon Constructing Programme (LCBP) in the UK, to cover up to 50% of the installation expense.

Some provinces and municipalities provide added subsidies as a component of their personal renewable power development programmes. Most commonly these

subsidies are a element of neighborhood measures against climate adjust and are usually reconsidered yearly.


four.2.two Savings through utilizing of the generated electricity

Making use of the electrical energy generated at the place implies direct savings for the owner through a lower electrical energy consumption bill. The savings rely on the value

paid to the electricity supplier by the customer for electricity supplied from the grid. For instance, the customers of the supplier ENECO in The Netherlands spend approximately 21 eurocents/kWh. In the UK, standard expense of electrical energy for flats and households can range from 11p to 16p/kWh. These costs rely really much on the time for the duration of the day (or evening) when the electricity is employed.


Promoting to the grid

If there is a surplus of electrical energy generated from a little wind turbine, in theory it can be sold and the owner decides to whom. Most typically it would be sold to

an electricity provide company. The price can differ considerably from a single electrical energy company to yet another, so it is worth investigating several alternatives. For instance, in the Netherlands, ENECO pays 4.088 eurocents/kWh excluding VAT (2007).


The electrical energy supplier Green Decision provides discount on the supplied electricity to his consumers who feed their power surplus into the grid. Selling electricity to the grid is regulated differently in each and every nation. If the owner of a UWT wants to sell his electricity to the grid, (s)he might want to have a specific type of meter that measures each techniques: the electricity sold to the grid and the electricity consumed from the grid. This kind of meter is readily available but is not installed as normal and so may require to be installed as element of the wind turbine installation.

four.three Efficiency of UWTs


The efficiency of wind turbines is most frequently measured in terms of expense-effectiveness, i.e. in cost per kWh of the developed electricity. In a technical context in order to determine the revenue producing possible, the efficiency would be measured as a yield, measured as the quantity of kilowatt-hours made per square meter of rotor region per year (kWh/m2/yr).


At this moment there are insufficient yield figures for UWTs from real projects to draw definitive conclusions on efficiency. This means that the efficiency can only

be estimated and that the comparisons in between various kinds of UWTs can not be completed reliably.


Nevertheless, an indicative comparison is supplied in Tables 4

and 5 by utilizing the “reference yield” from the manufacturer calculated at two certain wind speeds namely:


o 12 m/s: a figure close to the nominal wind speeds of most UWTs

o five.five m/s: a very good average wind speed for operation of the investigated UWTs.



A = rotor region

Vnom, Pnom en A have been provided by the vendors (see table 2). Pref is the result of the formula: Pref=(vref/vnom)three x Pnom

Comparison with massive turbines

The initial (capital) investment per kW can vary significantly in between distinct UWTs: according to the data provided by suppliers and producers it can be among two,400 and 9,100 euro/kW. In comparison, the initial investments for big turbines are about 1000 euro/kW for land installations and about 2000 euro/kW for offshore (investments in solar photovoltaic (PV) systems are about 6,200 euro/kWp installed).


The expected yield, assuming there is an average wind speed of 5.five m/s, would quite about quantity to 150 – 400 kWh/m2/year. The yield of large turbines

varies amongst 800 and 1200 kWh/m2/year.


The figures indicate that huge turbines clearly outperform UWTs and this is not surprising, as the circumstances beneath which they are implemented are really various.


However, UWTs are nevertheless in a development phase and though it is unlikely that they will ever attain the yields of huge wind turbines (since wind sources are not the exact same in urban environments) it can be anticipated that expenses will fall and the efficiency of UWTs will be considerably enhanced. Manufacturers of UWTs in the

Netherlands and the UK expect a cost reduction of about 40% by a ramped-up production of at least 500 turbines per year.


Lastly, UWTs create electricity that can be directly consumed at the site of generation. This implies that the made electricity is efficiently getting employed

against the consumer cost which is around five occasions greater than the cost paid for the electricity created by massive turbines.

Contemplating the installation capacity, expenses and the anticipated yield, it is far better to evaluate the UWTs with solar PV production of electrical energy.