Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy harvesting via co-locating horizontal- and vertical-axis wind
  turbines   Co-locating horizontal- and vertical-axis wind turbines has been recently
proposed as a possible approach to enhance the land-area power density of wind
farms. In this work, we aim to study the benefits associated with such a
co-location using large-eddy simulation (LES) and analytical wake models. In
this regard, small-scale vertical-axis wind turbines (VAWTs) in triangular
clusters are deployed within a finite-size wind farm consisting of
horizontal-axis wind turbines (HAWTs). Wake flow within the wind farm and the
effect of VAWTs on the overall wind-farm efficiency are investigated and
quantified. The results show that the optimal deployment of small-scale VAWTs
has a negligible impact on the performance of HAWT arrays while increasing the
total power production. For the particular cases considered here, the power
output of the co-located wind farm increases up to 21% compared to the baseline
case in which only the HAWTs are present. Also, by comparing to the LES
results, it is shown that the analytical framework proposed here is able to
accurately predict the power production of wind farms including both HAWTs and
VAWTs. Next, as a real-world application, potential benefits of deploying
small-scale VAWTs inside the Horns Rev 1 wind farm are explored for various
wind directions using the calibrated wake model. The results show potential for
about an 18% increase in the wind-farm power production, averaged over all wind
directions, for a particular VAWT layout investigated in this study. The
levelized cost of energy (LCoE) for the co-located wind farm is also assessed.
The simulations finds that meanwhile the installation of VAWTs increases the
annual energy production of the wind farm, it also increases the LCoE, which is
caused by a) lack of operational data, and b) a low technology readiness level
for VAWTs and floating foundations.

23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
28
The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph