ojs2 has produced an error Message: WARNING: mkdir(): Permission denied In file: /var/www/html/lib/pkp/classes/file/FileManager.inc.php At line: 306 Stacktrace: File: (unknown) line (unknown) Function: PKPApplication->errorHandler(2, "mkdir(): Permission denied", "/var/www/html/lib/pkp/classes/file/FileManager.inc.php", 306, Array(2)) File: /var/www/html/lib/pkp/classes/file/FileManager.inc.php line 306 Function: mkdir("/usageStats") File: /var/www/html/lib/pkp/classes/file/FileManager.inc.php line 352 Function: FileManager->mkdir("/usageStats", Null) File: /var/www/html/lib/pkp/classes/file/FileManager.inc.php line 351 Function: FileManager->mkdirtree("/usageStats", Null) File: /var/www/html/plugins/generic/usageStats/UsageStatsPlugin.inc.php line 303 Function: FileManager->mkdirtree("/usageStats/usageEventLogs") File: /var/www/html/plugins/generic/usageStats/UsageStatsPlugin.inc.php line 217 Function: UsageStatsPlugin->_writeUsageEventInLogFile(Array(16)) File: (unknown) line (unknown) Function: UsageStatsPlugin->logUsageEvent("UsageEventPlugin::getUsageEvent", Array(7)) File: /var/www/html/lib/pkp/classes/plugins/HookRegistry.inc.php line 89 Function: call_user_func(Array(2), "UsageEventPlugin::getUsageEvent", Array(7)) File: /var/www/html/plugins/generic/usageEvent/UsageEventPlugin.inc.php line 107 Function: HookRegistry->call("UsageEventPlugin::getUsageEvent", Array(7)) File: (unknown) line (unknown) Function: UsageEventPlugin->getUsageEvent("TemplateManager::display", Array(5)) File: /var/www/html/lib/pkp/classes/plugins/HookRegistry.inc.php line 89 Function: call_user_func(Array(2), "TemplateManager::display", Array(5)) File: /var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php line 332 Function: HookRegistry->call("TemplateManager::display", Array(5)) File: /var/www/html/pages/article/ArticleHandler.inc.php line 234 Function: PKPTemplateManager->display("article/article.tpl") File: (unknown) line (unknown) Function: ArticleHandler->view(Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPRouter.inc.php line 362 Function: call_user_func(Array(2), Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPPageRouter.inc.php line 220 Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(2), False) File: /var/www/html/lib/pkp/classes/core/Dispatcher.inc.php line 134 Function: PKPPageRouter->route(Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php line 190 Function: Dispatcher->dispatch(Object(Request)) File: /var/www/html/index.php line 62 Function: PKPApplication->execute() Server info: OS: Linux PHP Version: 5.3.3 Apache Version: Apache/2.2.15 (CentOS) DB Driver: mysql DB server version: 5.1.73
ojs2 has produced an error Message: WARNING: assert(): Assertion failed In file: /var/www/html/plugins/generic/usageStats/UsageStatsPlugin.inc.php At line: 306 Stacktrace: File: (unknown) line (unknown) Function: PKPApplication->errorHandler(2, "assert(): Assertion failed", "/var/www/html/plugins/generic/usageStats/UsageStatsPlugin.inc.php", 306, Array(7)) File: /var/www/html/plugins/generic/usageStats/UsageStatsPlugin.inc.php line 306 Function: assert(False) File: /var/www/html/plugins/generic/usageStats/UsageStatsPlugin.inc.php line 217 Function: UsageStatsPlugin->_writeUsageEventInLogFile(Array(16)) File: (unknown) line (unknown) Function: UsageStatsPlugin->logUsageEvent("UsageEventPlugin::getUsageEvent", Array(7)) File: /var/www/html/lib/pkp/classes/plugins/HookRegistry.inc.php line 89 Function: call_user_func(Array(2), "UsageEventPlugin::getUsageEvent", Array(7)) File: /var/www/html/plugins/generic/usageEvent/UsageEventPlugin.inc.php line 107 Function: HookRegistry->call("UsageEventPlugin::getUsageEvent", Array(7)) File: (unknown) line (unknown) Function: UsageEventPlugin->getUsageEvent("TemplateManager::display", Array(5)) File: /var/www/html/lib/pkp/classes/plugins/HookRegistry.inc.php line 89 Function: call_user_func(Array(2), "TemplateManager::display", Array(5)) File: /var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php line 332 Function: HookRegistry->call("TemplateManager::display", Array(5)) File: /var/www/html/pages/article/ArticleHandler.inc.php line 234 Function: PKPTemplateManager->display("article/article.tpl") File: (unknown) line (unknown) Function: ArticleHandler->view(Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPRouter.inc.php line 362 Function: call_user_func(Array(2), Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPPageRouter.inc.php line 220 Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(2), False) File: /var/www/html/lib/pkp/classes/core/Dispatcher.inc.php line 134 Function: PKPPageRouter->route(Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php line 190 Function: Dispatcher->dispatch(Object(Request)) File: /var/www/html/index.php line 62 Function: PKPApplication->execute() Server info: OS: Linux PHP Version: 5.3.3 Apache Version: Apache/2.2.15 (CentOS) DB Driver: mysql DB server version: 5.1.73
ojs2 has produced an error Message: WARNING: Cannot modify header information - headers already sent by (output started at /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php:393) In file: /var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php At line: 340 Stacktrace: File: (unknown) line (unknown) Function: PKPApplication->errorHandler(2, "Cannot modify header information - headers already sent by (output started at /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php:393)", "/var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php", 340, Array(7)) File: /var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php line 340 Function: header("Content-Type: text/html; charset=utf-8") File: /var/www/html/pages/article/ArticleHandler.inc.php line 234 Function: PKPTemplateManager->display("article/article.tpl") File: (unknown) line (unknown) Function: ArticleHandler->view(Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPRouter.inc.php line 362 Function: call_user_func(Array(2), Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPPageRouter.inc.php line 220 Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(2), False) File: /var/www/html/lib/pkp/classes/core/Dispatcher.inc.php line 134 Function: PKPPageRouter->route(Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php line 190 Function: Dispatcher->dispatch(Object(Request)) File: /var/www/html/index.php line 62 Function: PKPApplication->execute() Server info: OS: Linux PHP Version: 5.3.3 Apache Version: Apache/2.2.15 (CentOS) DB Driver: mysql DB server version: 5.1.73
ojs2 has produced an error Message: WARNING: Cannot modify header information - headers already sent by (output started at /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php:393) In file: /var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php At line: 343 Stacktrace: File: (unknown) line (unknown) Function: PKPApplication->errorHandler(2, "Cannot modify header information - headers already sent by (output started at /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php:393)", "/var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php", 343, Array(7)) File: /var/www/html/lib/pkp/classes/template/PKPTemplateManager.inc.php line 343 Function: header("Cache-Control: no-store") File: /var/www/html/pages/article/ArticleHandler.inc.php line 234 Function: PKPTemplateManager->display("article/article.tpl") File: (unknown) line (unknown) Function: ArticleHandler->view(Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPRouter.inc.php line 362 Function: call_user_func(Array(2), Array(2), Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPPageRouter.inc.php line 220 Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(2), False) File: /var/www/html/lib/pkp/classes/core/Dispatcher.inc.php line 134 Function: PKPPageRouter->route(Object(Request)) File: /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php line 190 Function: Dispatcher->dispatch(Object(Request)) File: /var/www/html/index.php line 62 Function: PKPApplication->execute() Server info: OS: Linux PHP Version: 5.3.3 Apache Version: Apache/2.2.15 (CentOS) DB Driver: mysql DB server version: 5.1.73
Assessment of Wind Energy Potential in Thailand Based on Using the Multiple-Weibull Distribution

Page Header

Home > Vol 15, No 3 (2019) > Sridech

Assessment of Wind Energy Potential in Thailand Based on Using the Multiple-Weibull Distribution

Wikanda Sridech, Teerawat Klabklay

Abstract


Abstract

Wind energy potential analysis is a design key to maximize wind turbine efficiency and annual energy output. Typically, the annual wind speed frequency is represented by a Single-Weibull distribution curve in spite of strong and calm wind patterns could occur through a year in many regions in the world, Thailand for instance.  For this reason, wind energy potential should be analyzed by Multiple-Weibull distribution curves which are the representative of the meteorological seasons due to the monsoon’s effect.  Therefore the objective of this study is to compare the accuracy of the Single-Weibull distribution and the Multiple-Weibull distribution in assessment of wind energy potential.  The comparison was made between these two statistical distribution functions and the actual wind speed distribution (measured wind speed frequency) in order to determine the level of credibility of these two distribution functions.  The wind speed data employed in this study was measured at Lamtakhong dam site in Nakhon Ratchasima province, Thailand.  As the results, the error between the Single-Weibull distribution was 16.46% where the error between the Multiple-Weibull distribution was 14.82%, it was revealed that the smaller error, the higher reliability.  Two of the most widely used wind turbines (Enercon E-30 and Windspot) were selected to verify the Multiple-Weibull concept.  Approximately 40% increase in annual energy yield by using this method.  So, the results confirmed that the Multiple-Weibull distribution is valid for the assessment of the annual energy production of wind turbines.  Therefore, this will be a practical method for achieving the optimal design of stall-regulated wind turbine in the further work.


Keywords


Monsoon’s effect, Maximum AEO, Multiple-Weibull distribution, Stall-regulated wind turbine

Full Text: PDF

Refbacks

  • There are currently no refbacks.