Cel­lar sci­ence

Decanter - - LETTERS -

I was In­ter­ested to read alis­tair Macrow’s let­ter about his cel­lar and its tem­per­a­ture fluc­tu­a­tions (‘Notes & Queries’, Novem­ber 2018). I won­der if it has not been built cor­rectly. One of the few times I perked up and paid at­ten­tion while study­ing me­chan­ics at univer­sity was when we solved heat dif­fu­sion equa­tions to de­ter­mine the op­ti­mum depth for a wine cel­lar. Clearly, sur­face tem­per­a­ture varies with the sea­sons. Heat dif­fuses into the ground very slowly, caus­ing sea­sonal vari­a­tion in soil tem­per­a­ture. Be­yond a cer­tain point, this vari­a­tion be­comes neg­li­gi­ble and the cel­lar will be at a con­stant tem­per­a­ture year round. If built cor­rectly, and de­pend­ing on sur­round­ing soil types, a cel­lar at around 4m depth should have an ac­cept­ably sta­ble tem­per­a­ture, with an­nual vari­a­tions of a few de­grees at most. Alas­tair MacKe­own, by email

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.