Lithium bromide – I’d like some advice; please help to share this information.

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Recently, in our unit, when too much steam is used, the evaporation temperature drops. We are worried that the unit might crystallize; the evaporation temperature fell from 4.5 to 3.7 degrees. What’s even more concerning is that the crystallization temperature suddenly rose from 2.5 to 8.9 degrees. After increasing the amount of steam supplied, the crystallization temperature dropped. The evaporation temperature hasn’t changed much. Based on my studies and personal analysis over these days, the evaporation temperature is proportional to the evaporation pressure; a lower evaporation temperature indicates that less refrigerant vapor is generated inside the evaporator. ? After that, I turned on the steam, and the evaporation temperature actually dropped. I then analyzed the problem as being related to the inlet of the circulating water; earlier, at the beginning of summer, the inlet of the circulating water was set to a low level, so the temperature of the circulating water wasn’t very high. This led to crystal formation once due to the high flow rate. It’s currently at a valve setting of 30. These are the reasons I considered. Imagine that if too much circulating water is used, more refrigerant water will be generated in the condenser, and the pressure inside the evaporator will inevitably rise. What confuses me now is that even with the circulating water at a valve setting of 30, and despite having the steam flow at a high level, why has the evaporation temperature dropped? ? ?