From: Atiq Rahman <atiqur11@...>
Subject: RE: {Disarmed} Re: [reein] Rice Husk - renewable enegy [1 Attachment]
To: reein@yahoogroups.com
Date: Tuesday, June 30, 2009, 5:44 AM

Vestas V100 is now rated as 1.8 MW with wind speed 12m/s.  Evetually if the wind speed is 15m/s, it will turn faster and will product more energy and you can call it as 2.75MW turbine.  No matter what you call it, this turbine will not even turn if the wind speed is less than 4m/s.  See the following link and attached brochure from Vestas.

http://www.thewindp ower.net/ wind-turbine- datasheet- technical- 34-vestas- v100-2750. php


One may say that it has a lower cut-in speed (even though I have not heard such from anybody else).  However, the definition of "cut-in speed" is the minimum wind speed that makes the turbine overcome its static inertia without any electrical load on it (only with the turbines mass moment of inertia).  If you add electrical load, the total inertia increases a lot and then the turbine requires more fuel (wind velocity in this case) to rotate.  Please look at the attached Vestas brochure, for your information.

Regarding Mistaya and Windographer, please put more value and emphesis on basic engineering theories and logical judgement rather than software.  When we do a calculation by a software in here, we always verify the results with hand calculation.  There is a handful of examples in this regard.

 

---

To: reein@yahoogroups. com
From: skkhadem@yahoo. com
Date: Mon, 29 Jun 2009 15:21:46 -0700
Subject: RE: {Disarmed} Re: [reein] Rice Husk - renewable enegy

Dear brother, Thanks for your comments. Regarding Vestas V100 model turbine, I would like to say that I find the power curve of this turbine in a software called windographer - developed by Mistaya, a canadian company and has been used in the popular HOMER software. From the power curve it shows that cut in and off are 2.5m/s and 12m/s respectively and giving a very good capacity factor the measured data at Feni by JICA. Also I find in a Japanese Project proposal that they used this turbine for their analysis as suitable for low wind speed region. Regarding commercial power generation, I prefer solar for hilly and some of the coastal region and in northern part of Bangladesh. Better not to go for solar home system. Choose off-grid community based or on-grid small scale (5 - 20 kW) system. For the coastal islands - no doubt, wind is better than solar. Good prospect in coastal line and in island for wind power generation. Possibility for around 2000MW installation based on medium scale turbine. Even some places are better for wind home system compare to solar home system. Both are better than diesel genset system. For PV with grid - production cost will be within 13 - 20 taka/kWh without any subsidy. For stand-alone system, it will be around 25  - 35 taka/kWh based on energy used. For wind, with grid - production cost should be in between 7 - 15 taka/kWh. These are based on some constrain and details can be found in SWERA report. For solar - pay back period is higher then wind. Also investment cost is more or less same for both system - depending on capacity. Lots of calculation are needed. These information are based on some special consideration. Details in SWERA. Hope these information will be helpful for all of us. regards, Shafiuzzaman --- On Mon, 6/29/09, Atiq Rahman <atiqur11@hotmail. com>n wrote: From: Atiq Rahman <atiqur11@hotmail. com> Subject: RE: {Disarmed} Re: [reein] Rice Husk - renewable enegy To: reein@yahoogroups. com Date: Monday, June 29, 2009, 6:40 AM Mr. Shafiuzzaman, I am still reading your long reports!  Excellent writing! Thanks for sharing the information. One comment so far: From your data, it looks like there are few places where wind speed is from 4m/s to 6m/s (even though some discrepency of data taken by two parties).  These places can be classified as Wind Class 2 to 4.  Vestas V100 2.75MW turbines, as you referred in your report, are designed for higher wind classes (when we say 2.75 MW, we should also say at 15m/s wind speed) and are not suitable for these zones.  Vestas V100 would most of the time not even turn because of their high cut in / start up speed (4m/s).  Vestas has specifically designed these turbines for class 8 or higher wind zones, which is usually available offshore. Anyway, since you have done some research in both solar and wind sector in Bangladesh, what is your opinion about commercial power generation from solar and wind in Bangladesh?  How do they compare in terms of investment and payback? Others are also welcome to comment. - Atiq   To: reein@yahoogroups. com CC: atiqur11@hotmail. com From: skkhadem@yahoo. com Date: Fri, 26 Jun 2009 10:59:53 -0700 Subject: RE: {Disarmed} Re: [reein] Rice Husk - renewable enegy [3 Attachments] [Attachment(s) from Md.Shafiuzzaman Khan Khadem included below] Dear brothers, Thanks for your nice mail. It is also my pleasure to find lot of interested young persons in this group along with motivation. Nice to know that we are thinking for alternative power solution for our country. I hope in the reein website, you will find lot of information regarding renewable energy activities in Bangladesh. For your kind information, I have attached herewith the completed project report of solar and wind energy resource assessment Bangladesh that has been done under UNEP / GEF. I feel proud to be an active resource person of this project. It will give you a clear idea on solar and wind energy in Bangladesh, availability, feasibility for systems etc. If you need further more about it, I will be very happy to cooperate you. I also have some other study on wind home system feasibility for coastal bangladesh which is in processing for publication. Thanks again for your active participation in this feild. Hope to work more and obviously for Bangladesh. regards, ------------ --------- --------- --------- - Md. Shafiuzzaman Khan Khadem PhD Researcher Room No: KEG 36C School of Electrical Engineering Systems Dublin Institute of Technology Kevin Street, Dublin 8 Ireland Tel: +353 1 402 2814 (Office) Mob: +353861751009 --- On Fri, 6/26/09, Atiq Rahman <atiqur11@hotmail. com> wrote: From: Atiq Rahman <atiqur11@hotmail. com> Subject: RE: {Disarmed} Re: [reein] Rice Husk - renewable enegy To: reein@yahoogroups. com Date: Friday, June 26, 2009, 6:56 AM You are right Fahd.  The Cost of Energy (COE) is much lower in wind energy than solar PV, provided moderately strong wind is available.  Coastal areas in Bangladesh may not be the best locations for wind turbines, because every year we have tornadoes and to make the tower strong enough to withstand the wind load during a tornado, the structural cost would be very high, in addition to the extra cost of transmission lines.  Perhaps, Dr. Huque can comment on this.   It is remarkable that in Canada if you were generating electricity from solar PV panels, you would get $0.82 for each kWh produced (Grid tied), whereas for wind turbines this incentive is only $0.12/kW (cost of regular electricity is about $.09/kW).  The reason is that: if properly designed, wind turbines can pay back much faster than other energy sources and the government do not need to help the wind energy businesmen.  If you are looking at the total 20 year energy production cost, a wind farm can be even better than combine cycle power plants.  Wind farms became a good business in Canada and USA, and the Governments have actually needed to issue regulations so that not everyone can make a wind turbine at their backyards. I am recently installing a 10kW grid tied PV system for the city I am working for, after failing to get permission to install wind turbines.  Here we have new regulation that no wind turbines can be installed within 550 meters of human habitation - which made wind power generation harder in here.  Is there any similar regulation or restriction on wind turbines in Bangladesh? Anyways, I hope that as an electrical engineer you find an opportunity in power generation section and grow your expertise.  Hopefully together we all can do something good for our country. Regards, Atiq     To: reein@yahoogroups. com From: fahdalgeorgy@ yahoo.com Date: Tue, 23 Jun 2009 20:32:29 -0700 Subject: RE: {Disarmed} Re: [reein] Rice Husk - renewable enegy Dear Atiq bhai, I am an electrical engineer working in a telecom sector. not for a long time but still... I could not manage to find an opportunity to work either in the conventional or renewable energy sector in Bangladesh. Grief!! I used to be in Germany and there i had an opportunity to have an exposure to the wind energy sector. Truly this is an effective means of producing electricity. Though I do not have any organizational backing to work in renewable energy but from my observation point, solar energy is still much costlier to be adopted in every part of Bangladesh.Several NGO s are trying to make it popular and Rahim Afrooz, Grameen Shakti are commercially doing the business. I am also trying to search the details how much effective they are!... but seriously on tha bank of rivers of BD and near coastal area wind energy could be surveyed in details. I will try to know if such research has been done and will try to let you know. regards, Fahd --- On Tue, 6/23/09, Atiq Rahman <atiqur11@hotmail. com> wrote: From: Atiq Rahman <atiqur11@hotmail. com> Subject: RE: {Disarmed} Re: [reein] Rice Husk - renewable enegy To: reein@yahoogroups. com Date: Tuesday, June 23, 2009, 11:58 PM Dear Dr. Huque: This is great to hear about so many clean energy projects in Bangladesh.  This is really amazing! Just wondering, you have not mentioned anything about wind energy.  Usually wind energy is more cost effective than solar and biomass plants.  There are few wind turbines installed at various locations, wondering if these are being monitored for their performances and energy outputs. Is there any dedicated body in here for wind energy sector? I have a feeling that besides the big rivers there may be good opportunities of wind power generation exist.  Was there any study done on this? I also noticed that you are in Renewable Energy Research Centre in Dhaka University.  What are the other organizations and institute involved in this sector? Thanks, Atiq Rahman, M.Eng., P.Eng., LEED AP, PMP Etobicoke, ON Canada (416) 242-9598   To: reein@yahoogroups. com From: saifulhq@citechco. net Date: Mon, 22 Jun 2009 02:44:42 +0600 Subject: {Disarmed} Re: [reein] Rice Husk - renewable enegy Dear Sir,   In Bangladesh we are working  to create awareness on renewable energy and new technology since 1990, We build the firtst Grid connect PV system in Bangladesh. Solar powered hybrid three wheeler in Dhaka city. etc. about project we need to discuss further.About three lac house in the rural area already connected with solar PV. Thiry thousand bio gas plant installed using cow dung, poultry waste, few models was done using rice husk.   Dr. Saiful Huque Renewable Energy Research Centre University of Dhaka   ----- Original Message ----- From: Atiq Rahman To: reein@yahoogroups. com Sent: Sunday, June 21, 2009 2:14 AM Subject: RE: [reein] Rice Husk - renewable enegy Dear All: Not sure how I got included in the group email, however, I have been very much appreciating all these conversations and enthusiasms about renewable energy in Bangladesh. As a brief of my background, I have a number of years experience in energy management and alternative / renewable energy and currently working for a Canadian Municipal Government as a Professional Engineer (P.Eng.) to manage their energy related projects. I have been sincerely thinking about promoting the practice of renewable energy in Bangladesh.  However, being detached from all connections in Bangladesh for more than ten years, it became very difficult for me to find information on the "whats going on" of renewable energy implementation in Bangladesh.  I emailed one professor in BUET (to find some information on local wind data) who wrote a report on prospects of renewable energy in Bangladesh, and was my project supervisor many years ago, but probably many people in Bangladesh are still not used to checking their emails properly. Anyways, it is good to see that our young generation is interested in researching this sector.  I sincerely hope you all succeed in your career path.  If you feel that something good can be done in this sector in Bangladesh, and an expatriate can help you someway, please let me know.  If there is anyone who is willing to build a project and need any investor/partner to support you technically and financially, perhaps I can help you with that as well. Best of luck to all. Regards, Atiq Rahman, M.Eng., P.Eng., LEED AP, PMP Etobicoke, ON Canada   To: reein@yahoogroups. com From: salmansanni@ yahoo.com Date: Fri, 19 Jun 2009 02:56:36 -0700 Subject: [reein] Rice Husk - renewable enegy Hello,   I am iterested in having a similar setup as the one at Kapasia of Gazipur (link attached). Kindly guide me in this venture.   regards, Salman   http://www.reein. org/biomass/ gasification/ gasification. htm --- On Fri, 6/19/09, Saiful <saifulhq@citechco. net> wrote: From: Saiful <saifulhq@citechco. net> Subject: {Disarmed} Re: [reein] To work in renewable enegy To: reein@yahoogroups. com Date: Friday, June 19, 2009, 11:41 AM meet me at renewable energy research centre Dhaka university on sat 20th at b2.30pm   Dr.Saiful ----- Original Message ----- From: Sanjoy Nandi To: MailScanner has detected a possible fraud attempt from "us.mc657.mail. yahoo.com" claiming to be reein@yahoogroups. com Sent: Thursday, June 18, 2009 1:00 PM Subject: [reein] To work in renewable enegy Dear all I have completed M.S. in Physics with thesis work in the field of renewable energy. Now working as lecturer in University of Science and Technology at chittagong. I have 1 international and 2 national publication in the field of renewable energy,especially on wind enegy. Now looking to work more but this difficult to work in chittagong. Now I want to come in Dhaka. Would any body like to help me in this regard?   With Best wishes S. K. Nandi -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.