CROSS FLOW HEAT EXCHANGER –ALL YOU NEED TO KNOW
A Cross flow heat exchanger exchanges heat energy from one air stream in an air handling unit (AHU) to another. Unlike rotary heat exchangers, cross-flow heat exchangers do not exchange moisture and there is no risk of airflow short circuit. Cross flow heat exchangers are used in cooling and ventilation systems where heat needs to be transferred from one airflow to another. Cross flow heat exchangers are made up of thin metal plates, usually aluminum. Thermal energy is exchanged through the panel. Traditional cross flow heat exchangers have a square cross-section. The thermal efficiency is 40 to 65%. If higher thermal efficiency is required, a countercurrent or double cross flow heat exchanger can be used.
In some types of heat exchangers, moist air can cool to the freezing point and form ice. Crossflow is usually cheaper than other types of heat exchangers. This is typically used when hygiene standards require that both airflows be completely separated from each other. Widely used in large water bottles, hospitals, and heat recovery systems in the food industry. In contrast to rotary heat exchangers, cross-flow heat exchangers do not exchange moisture……….
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