Snacks by Ditsch

Ditsch, a wholesale bakery, sells specialties including salt pretzels, pizzas and croissants. To ensure that products are always fresh, the bakery supplies its branches with frozen raw products, which are baked on the premises as needed.

Requirements

To ensure consistent top quality in the freezing and chilling of the pre-formed dough.

Solution

The production system uses both a low pressure (-40 ºC) and a medium pressure refrigeration cycle (-10 ºC). The refrigerant used is ammonia. The sensitive fermentation cooling and air conditioning is handled by an indirect refrigeration cycle using glycol water as a secondary refrigerant. Heat is recovered using plate heat exchangers, and can be used to heat service water. The use of ammonia makes this refrigeration process both environmentally friendly and economical.