Wine Cooler/Cabinet for Chocolate Truffles/Pralines Storage
Posted in:
Tech Help, Tips, Tricks, Techniques
There are many, many different brands of wine coolers, I don't know them all, and many have angled shelves. They tend to be expensive for what they are, and they're not made to handle chocolate, so they are expensive - and may not do what you need them to.
The real issue in cooling is moving heat away from the chocolate. With wine, we generally don't care how long it takes to get to temp from whatever temperature it's at when it goes in the fridge to storage/serving temp - usually overnight or longer is okay. Bottles already in the fridge have a pretty good thermal mass and are not likely to warm up by more than a fraction of a degree when opening the door of the fridge and adding a bottle or two.
With chocolate we do care about the speed of removing the "latent heat of crystallization" (the heat given up by the chocolate as it cools and crystallizes) - too fast or too slow can result in sub-optimal results.
Therefore, we do care about temp and volume of airflow and "recovery time" (how quickly it takes the fridge to return to the set temp after the door is opened) and other variables. There is a reason why cabinets made specifically for chocolate crystallization and holding (e.g., Irinox) as expensive as they are.
In general, the larger the volume of the cabinet, the better the recovery time is. Airflow needs to be controlled and directed to remove the heat added to the cabinet, which can vary widely. If you're molding 500gr blocks of chocolate and put 50 of them into the cabinet you have to move a lot more heat than if you put 20 bonbon molds in to crystallize.
General rule is make it larger than you need it so that you can use the volume of the room to help you. One confectioner I know in NYC set up a cooling/storage room in their facility that measures 10x20 feet. Everything comes in on trays on speed racks. The room is set to about 62F and airflow is relatively modest. Not everyone has this luxury, of course. But you can do use the same concept in a much smaller space.