These comments come from the recent Field Test Instrumentation and Measurement Topical Expert Meeting and were submitted by Sandia National Labs.
Portable radar developed at Texas Tech allow seeing complex wind flow across a large wind farm.
On October 7 and 8, the International Energy Agency (IEA) Wind Topical Expert Meeting (TEM) on Field Test Instrumentation and Measurement Best Practices was held at Texas Tech University. The event, hosted by the DOE Wind Power Program, Texas Tech University (TTU) and Sandia National Laboratories, included 18 U.S. and European field test experts from government agencies, national laboratories and academia. The objectives of the TEM were to:
- discuss the strengths and limitations of existing field measurement technology,
- examine state-of-the-art instrumentation,
- establish best practices and lessons learned from previous campaigns to inform future experimental campaigns,
- ascertain best practices for using scaled and controlled testing or both to complement utility-scale testing and
- develop requirements for comprehensive future field campaigns that will improve model prediction accuracy of the fluid physics throughout wind farms.
Sandia researchers, Tommy Herges and Jon White, contributed presentations on an overview of the Wake Imaging System and the capabilities of the SWiFT facility. Additional presentation topics included LIDAR and TTU RADAR flow-field measurements and DLR’s (the German Aerospace Center) development of a new wind farm testing facility in Germany. For measurements on the wind farm scale, long-range pulsed LIDAR and TTU’s RADAR were found to have potentially complementary capabilities. Finer spatial resolution field measurement technologies included continuous-wave LIDAR, met tower sonic anemometers, and the Sandia Wake Imaging System. Continuous-wave LIDAR is an established technology capable of point measurements while the Sandia Wake Imaging System aims to capture instantaneous 2D images needed to measure the coherent turbulent structures in the wake near the rotor.
Alternatively, DLR plans to use a fractal array of sonic anemometers on met towers for their high-resolution velocity measurements of wind turbine wakes. More detail on the meeting can be found through the contact below, and the IEA plans to provide the presentations on its website.
Tommy Herges, (505) 284-9760.
| Attendees at the IEA Wind Topical Experts Meeting at Texas Tech University. |
Sandia National Laboratories
www.sandia.org
Filed Under: Events, Innovators & influencers, News
Subject: PRODUCTION OF WIND MILL ENERGY FROM EXHAUST OF A/C PLANT
IN COMMERCIAL BUILDINGS (A/C CAPACITY 50 TONNES OR MORE)
I am sending a project report on Renewable Energy for you to study and send your valuable comments.Please see if it can be implemented at your place. Thanks.
(Please go to link—– netzwelt.in/green-energy/suresh.html
I am working in a building which is centrally A/C. I got the idea of using the exhaust wind of Air conditioning plant to rotate the turbine for producing energy .If my idea of producing electricity from windmill which can be rotated by the exhaust of A/c plant comes true ,then there will be an Energy revolution in the areas where there is no wind mill due to lack of constant flow of wind. Till date the wind mill works in only coastal areas and not in places away from coastel regions.
The A/c plant works for at least 12 hours in offices and that means the wind mill can generate energy daily for 12 hours without need of natural wind . In off duty hours if there is natural wind ,the wind mill can produce energy, but for at least twelve hours the exhaust air can rotate the wings of windmill for energy production which is otherwise going waste.
This is an idea to produce energy by using the exhaust air from Air conditioner in A/C buildings which is otherwise going waste.I just want to let the world know about the utility of Air from Exhaust fan of Air conditioner which is going waste.By my calculations we can produce energy equal to 26%-35% of the total energy consumption . The cost of Wind mill turbines can be recovered in three years and after that the energy is produced free of cost . In this way we can produce energy in the places far off from coastal areas where till date no wind mill energy is working due to lack of constant flow of wind .
By implementing this technique of horizontal wind turbine we can produce AT LEAST 26% cost of the investment which is needed to start this project and the production is totally green , there is no carbon emmission, no smoke,no pollution and we are only using the wind that otherwise is going waste all over the world.
The wind turbine is not going to effect the efficiency of the A/C plant, rather it helps the A/c plant as can be seen from the lab experiments.
1. Benefits of the exhaust air energy recovery system
The energy recovery system is designed in a way that the released waste energy from any exhaust air system is converted to useable energy. As the wind from the exhaust fan is readily available and concentrated every time the exhaust air system is operating, the energy generated from the system is predictable and constant in value. With constant rotational speed of turbine, over speed control is not required as only small rotational speed fluctuation is experienced. This feature can increase the longevity of the turbine due to less fatigue experienced. Besides, wind blown by the exhaust‘s fan has a better quality compared to natural wind. Thus, the statistical analysis of wind characteristic over a period of time is not required before deployment of the turbine. In addition to that, selection of the wind turbine for the system would be simpler because the rated speed of the turbine is based on the exhausted wind and power output generated from the system is easily predictable.
2. TABLE 1: LABORATORY TEST RESULTS :
Parameter Cooling tower without wind turbine Cooling tower with wind turbine Cooling tower with wind
turbine and diffuser
Average intake air velocity 1.97m/s 2.28m/s 2.14m/s
Intake air flow rate 1.05m/s 1.22m/s 1.14m/s
Motor power consumption 0.85mA 0.85mA 0.85mA
Motor power consumption 206.37w 204.38w 203.78w
Turbine speed 464rpm 501rpm 514 rpm
An exhaust air energy recovery system without resulting in negative impact is designed. The performance of the( Wind turbine-)WTs are efficiently boosted by integrating with an enclosure. Diffusers mounted at an optimum angle created venture effect and the exhausted air flow was improved. Besides, common safety mishaps such as blade failure problem are eliminated with the installation of the enclosure. It could act as a protective cover to protect the entire system. -Due to the simplicity of the design, this energy recovery system is retrofit-able to any existing exhaust air system with minimum visual impact.
From the laboratory test conducted, installed WT is able to generate electricity without pulling down the original performance of the cooling tower. Instead, the cooling tower’s performance was enhanced as air volume flow rate to the cooling tower is raised 8.6% higher. By integrating the WT with an enclosure to the design, the WT’s performance is improved where the rotational speed is raised from 463.72 rpm to 500.98 rpm. On site testing was conducted to further confirm the actual performance and reliability of this system. It was observed that the released air speed from the cooling tower increased by 0.4% more compared to the conventional cooling tower. In terms of the motor’s power consumption, there was no significant difference observed for both test cases (7.0~7.1 kW). The implementation of this energy recovery system is possible to conserve power consumption from the cooling tower by 26%-35%. By turning what was a wasted energy to useable energy like electricity, this energy recovery system has a high market potential and fast payback period as there are numerous usages of exhaust air system globally. It can be used as supplementary power for building lightings or fed into the electricity grid for energy demand in urban buildings.
Hope the above will be sufficient for making my point clear.
If you so desired ,i can send my project report .It is for all and i want to implement it for the benefit of mankind.
Thanks and regards,
suresh kumar
{I want to make every Air conditioned building on this globe a small power house- Just think over it}
sureshkito@yahoo.com