Predicting and evaluating the performance of ice harvesting thermal energy storage systems
- Mammoth Inc., Chaska, MN (United States)
The author describes a model for predicting the net rated ice making capacity of thermal energy storage systems. Harvesting ice generators are a simple application of a direct expansion, flooded or pumped overfeed refrigeration system. Single refrigeration circuits over 300 tons (1,056 kW) have been predominantly pumped overfeed. The evaporator consists of a series of vertical plate heat exchangers mounted above a storage tank. Water is pumped from the storage tank at low head and distributed over the evaporator surface where it flows in a thin film down the surface and returns to the storage tank by gravity. If the water temperature is warm, the evaporator functions as a chiller. If the water temperature is low, some of the water is frozen into sheets of ice about 3/16 in. to 3/8 in. (5 to 9 mm) thick. Periodically, the ice is released from the evaporator surface by reversing the refrigerant flow to the evaporator.
- OSTI ID:
- 69755
- Journal Information:
- ASHRAE Journal, Vol. 37, Issue 5; Other Information: PBD: May 1995
- Country of Publication:
- United States
- Language:
- English
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