Mother Nature's Legacy - Coil Frost
Mother Nature's Legacy - Coil Frost (1988)-Ammonia evaporators collect frost when coil surfaces are below freezing. Blockage and frost insulation greatly reduce heat transfer and coil capacity. Air flow Frost must periodically be removed to restore evaporator efficiency. Presently, automatic hot gas defrost is the most widely used defrost method. Latent heat of condensation, contained in compressor discharge gas: warms the coil mass - above freezing - melting its frost blanket. Less than 15% of the heat input melts frost, the rest heats tubes and fins from the inside out.
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