it takes time to transfer heat from from a cooling/heating jacket or plate to a tank of liquid. there are variables, the size and shape and thickness of the plate/jacket, the material that you are working with [honey], the material that the heat is flowing thru [stainless steel is not a good heat conductor as metals go], the big rate factor is the difference in temperature [the bigger the difference the faster the flow]. so if you have the actual jacket heat higher then the liquid, it will heat faster. if you agitate the liquid then the heat will transfer heat quicker. it does not take much liquid movement, a lot more does not help. I have more than 30 years experience with milk tank refrigeration.