Questions tagged [wind-power]

For questions related to power (mechanical or electrical) generated from wind.

13 questions with no upvoted or accepted answers
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In horizontal axis wind turbines, why does axial component of absolute velocity stay constant (wake rotation theory)

I am having hard time understanding how does the axial component stay constant through the rotor. Every resource i look just says it is due to mass conservation but never gives the actual conservation ...
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1answer
116 views

Is a geared motor better for a DIY wind turbine?

I have decent electronic understanding, but I've not much idea about motors. I plan to make a small wind mill which should be enough to power a couple of LED lights for like an hour every day. I was ...
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0answers
31 views

Can you channel more air into a nozzle by creating a vortex inside of it?

There are designs for ducting in wind turbines to channel a wider cross section of wind into the rotor area. This is unpractical for structural and economical reasons but does actually increase power ...
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0answers
38 views

Superimposing a Vector Field onto a Toroid in Matlab

I am a systems and control PhD student in Aerospace Engineering. Currently, I am trying to create a wind shear model of a toroidal thermal "bubble" in Matlab similar to the one in this paper (shown ...
1
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0answers
41 views

Conceiving a wind turbine as a thermodynamic machine

Traditionally, and continuing till the present day, wind turbines are conceived/presented as power plants which harvest the (macroscopic) kinetic energy carried by an externally available airflow, ...
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0answers
31 views

Hybrid Energy Monitoring Systems

I have been doing research on renewable energy systems and I must admit that I am a newbie in this specific area. I have noticed that stand-alone systems have their own specific monitoring system ...
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0answers
51 views

Theoretical calculation of blade pitch angle

I would like to start by apologizing for my ignorance, I am sure I am missing something very obvious here. I am using data for the NREL 5MW reference turbine, and specifically power curve and power ...
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0answers
37 views

What is the simplest way to convert this oscillating angular motion to (incremental)rotation? and some Q on viability of lin. wind energy extraction

Intro; I'm currently obsessing over linear energy extraction from wind; a surface to extract the maximum amount of energy from wind in one stroke, then rotating/changing shape on the aerodynamic ...
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0answers
23 views

Shadow flicker validation

I am currently trying to validate a shadow flickering algorithm against some data generated by Openwind. The goal of this validation is to have a code that we know that is correct and modify it to ...
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1answer
281 views

Why did my result show "more blades on turbine = more RPM"?

I placed a normal cooling fan 45cm away from a small turbine generator. i had 3 turbines, one with 4 blades, 8 blades, and 12 blades. The one with 12 blades always rotated the fastest, even after ...
-1
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2answers
89 views

Correct wind Weibull distribution for wind+solar system

I'm trying to forecast the peak power output for a wind + solar system. The solar output as a function of time of day and month can be forecasted easily. I also have the historical wind speed for a ...
-1
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1answer
140 views

Capacity credit vs capacity factor

What is the difference between capacity factor and capacity credit? I know that capacity factor = annual generation / (installed capacity * 8760) but I don't understand how capacity credit is ...
-1
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2answers
41 views

What is and how do you calculate the wind velocity design for wind turbines?

I am finding it difficult to get consensus on the definition of design wind speed for aeolic turbines. I thought it was the velocity that corresponds to the maximum power output, but I have already ...