koelschip

A koelschip is a type of Dutch sailing vessel that was used primarily in the 17th and 18th centuries. The name "koelschip" translates to "cool ship" in English, which likely refers to its function as a refrigerated cargo carrier. These ships were designed to transport perishable goods such as butter, cheese, and herring from the Netherlands to other parts of Europe.

The koelschip typically featured a double hull with a space between the two layers. This space was filled with ice, which was harvested from frozen canals in winter and stored in insulated ice houses. This innovative design helped to keep the cargo cool and fresh during long voyages. The ships were also equipped with a specialized ventilation system that allowed for the circulation of cold air throughout the cargo hold.

Koelschepen played a significant role in the Dutch Golden Age, facilitating trade and contributing to the economic prosperity of the Netherlands. They were particularly important for the export of dairy products, which were a major commodity at the time. The technology employed in koelschepen was advanced for its era, and it laid the groundwork for later developments in refrigerated transport. While not as widely known as other historical ship types, the koelschip represents an important innovation in maritime history.