Contemporary interest in food is not confined to pleasure in its
consumption, but extends in every direction: to its economic
importance, the semiotics of food taste, the dangers of food
additives and the politics of food security. We live in societies
as dominated by food preferences as by sexual preferences, as
obsessed about eating too little as by eating too much. In
addition our interest in food is associated, for good and evil,
with our interest in ‘nature’.
All air-handling units (AHUs) and many terminal units, if they are
not self-contained, require a source of heating and/or cooling energy.
This source is called a central plant, and the means by which thermal
energy is transferred between the central plant and the AHU is usually
a fluid conveyed through a piping system. The fluids used in
HVAC practice are steam, hot or cold water, brine, refrigerant, or a
combination of these. The equipment used to generate the thermal
energy is described in Chap. 7. In this chapter we discuss the transport
Trigeneration. The combination of gas engines with absorption
chillers is an optimal solution for generating air conditioning and/or
refrigeration. The waste heat from the mixture intercooler, the engin
oil, the engine cooling water, and the exhaust gas serves as drive
energy for the chillers. Combining a cogeneration plant unit with an
absorption refrigeration system allows utilization of seasonal excess
heat for cooling.
REFRIGERATION AND AIR CONDITIONING IV (EQUIPMENT COOLING)
..REFRIGERATION AND AIR CONDITIONING IV (EQUIPMENT COOLING) Subcourse OD1750 Edition A United States Army Combined Arms Support Command Fort Lee, VA 23801-1809
14 Credit Hours INTRODUCTION This subcourse is the last of four subcourses devoted to basic instruction in refrigeration and air conditioning.