{"id":558853,"date":"2024-11-05T18:22:13","date_gmt":"2024-11-05T18:22:13","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/esdu-880382012\/"},"modified":"2024-11-05T18:22:13","modified_gmt":"2024-11-05T18:22:13","slug":"esdu-880382012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/esdu\/esdu-880382012\/","title":{"rendered":"ESDU 88038:2012"},"content":{"rendered":"<p>\n\tESDU 88038 provides an estimation method for use when<br \/>\nmeteorological records are inadequate to provide the data directly,<br \/>\nor when they are not readily corrected for differences between the<br \/>\nterrain at the site and at the measuring station, or when a rapid<br \/>\nestimate of wind speed frequency of occurrence is required. It uses<br \/>\na theoretical approach, with some empirical factors, to relate the<br \/>\nparameters of the Fisher-Tippett Type 1 extreme value distribution<br \/>\nto the parameters of the parent Weibull cumulative distribution<br \/>\nfrom which the number of hours when the mean wind speed exceeds<br \/>\nspecified thresholds can be calculated. In practice, the extreme<br \/>\nvalue mode and dispersion parameters (or estimates) are more<br \/>\nreadily available for various regions of the world than the parent<br \/>\ndistribution data. The method may be used inversely, as illustrated<br \/>\nin ESDU 87037, to estimate extreme wind speeds from relatively<br \/>\nshort records of the parent distribution. It applies to winds from<br \/>\nany sector and to the case when all wind directions are combined. A<br \/>\nmethod is also provided to estimate the proportion of hours in a<br \/>\nyear when the wind direction is in a particular 30 degree sector.<br \/>\nGuidance is given on correction factors for changes from the<br \/>\nconditions of the basic data in terrain roughness, height and<br \/>\nsimple topography. The method has been tested against data from 50<br \/>\nUK sites and is considered to be applicable to wind climates in<br \/>\nmiddle to high latitudes. It has been tentatively extended to apply<br \/>\nto a wind climate contributed by more than one mechanism (for<br \/>\nexample, frontal depressions and thunderstorms).\n\t<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Estimation of Hours Per Year When Mean Wind Speed Exceeds Specified Thresholds<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/esdu\/\"><b>ESDU<\/b><\/a><\/td>\n<td>2012-02<\/td>\n<td>22<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":558862,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2675],"product_tag":[],"class_list":{"0":"post-558853","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-esdu","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/558853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/558862"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=558853"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=558853"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=558853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}