A coolship (Anglicized version of the Dutch/Flemish koelschip) is a type of brewing vessel traditionally used in the production of beer. It is a broad, open-top, flat vessel in which

wort Wort () is the liquid extracted from the mashing process during the brewing of beer or whisky. Wort contains the sugars, the most important being maltose and maltotriose, that will be fermented by the brewing yeast to produce alcohol. Wort ...

cools. The high surface-to-mass ratio allows for more efficient cooling. Contemporary usage includes any open fermentor used in the production of beer, even when using modern mechanical cooling techniques. Traditionally, coolships were constructed of wood, but later were lined with iron or copper for better

thermal conductivity The thermal conductivity of a material is a measure of its ability to conduct heat. It is commonly denoted by k, \lambda, or \kappa. Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal ...

. The word "coolship" was trademarked by

Allagash Brewing Company __NOTOC__ Allagash Brewing Company is a brewery in Portland, Maine. The brewery specializes in Belgian style beers. History The brewery was founded in 1995 by Rob Tod in Portland, Maine. He observed that while both German and British style be ...

in the United States. The company later decided to terminate the trademark, in the interests of maintaining good relations with others in the craft beer industry.Beeriodicals. ''A Trademark Battle Averted; It's Cool To Say "Coolship".''
Retrieved 14 August 2020

Modern use

Coolships are still used in traditional

lambic Lambic () is a type of beer brewed in the Pajottenland region of Belgium southwest of Brussels and in Brussels itself since the 13th century. Types of lambic beers include gueuze, kriek lambic and framboise. Lambic differs from most other beers ...

brewing, where the wort is cooled and airborne yeasts and bacteria present in the brewery are allowed to inoculate the beer naturally, in order to create a spontaneous fermentation.

References

External link

*{{Commonscatinline Brewing