Exam 44: Geothermal Heat Pumps

____________________________ heat pumps utilize two coaxial heat exchangers, as compared to only one on the water-to-air configuration.

Closed-loop, or ____________________, systems reuse the same heat transfer fluid, which is circulated in buried plastic pipes within the earth or within a lake or pond.

When the water and refrigerant in a heat exchanger flow in opposite directions, it is referred to as ____.

Three common types of antifreeze are salts, glycols, and ____________________.

An advantage of a "series flow" configuration of ground loops is ____.

Open-loop, water-source heat pump systems involve the transfer of heat between a water source and the air or water being circulated to a(n) ____________________ space.

One of the minor differences between troubleshooting a geothermal heat pump and an air-to-air heat pump is how to gain access to pressures and temperatures in the water or ground loop.

In a closed-loop system, the plastic water pipes that are buried in the Earth are called ____.

Since the Earth's crust is cooler than the air during the summer, it can be used to accept air conditioning heat loads.

A domestic hot water loop is often used for heating domestic hot water from the hot discharge gas coming from the heat pump's refrigerant compressor.

What are the advantages of a parallel-flow system?