A liquid-to-liquid heat exchanger uses a heat-transfer fluid that circulates through the solar collector, absorbs heat, and then flows through a heat exchanger to transfer its heat to water in a storage tank. Heat-transfer fluids, such as antifreeze, protect the solar collector from freezing in cold weather.
<span>I am definitely sure that sending an employee an email with important criticism represents a problem in message channel. Message channel is one of the ways through which two parties (manager-employee) communicate with each other.</span>