Refrigeration ExperimentMSU Chilled Water Plant Tour

Worksheet

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1. What devices in an absorption refrigeration system replace the compressor of a conventional vapor/compression refrigeration system?

2. Describe the four (4) fluid streams within a Trane absorption unit.

3. How does a cooling tower operate?

4. What is the rated capacity of the chilled water plant in tons of refrigeration, Btu/hr, and kW?

5. Given the chilled water flow rate (from the pump) and the entering and exiting temperatures of the chilled water stream for one of the absorption units, calculate the actual cooling load (in tons of refrigeration) the unit is providing.

6. Determine the Carnot cycle COP for the absorption cycle used at the MSU chilled water plant.

7. Using the Carnot cycle COP and assuming a cooling load of 1250 tons, determine the required mass flow rate of steam.

Figure 1. Outside View of Trane Absorption Unit

Figure 2. Schematic View of Trane Absorption Unit

Figure 3. Block Diagram of Absorption Refrigeration System

Table 1. MSU Central Chilled Water Plant Facilities

Chiller # Capacity(tons)

Pump Flow Rate(gpm)

at design T

Pump Flow Rate(gpm)

at T=14F1-Carrier 16JA054 475 1150@10F 8142-Carrier 16JA054 475 1150@10F 8143-Trane C12A-2 1170 2900@10F 20064-Trane C12A-2 1170 2900@10F 20065-Trane ABSC-12A4 1250 2143@14F 21436-Trane ABSC-12A4 1250 2143@14F 21437-Trane ABSC-12A4 1250 2143@14F 21438-Trane ABSC-12A4 1250 2143@14F 21439-Trane ABSC-12A4 1250 2143@14F 214310-Trane ABSC-12A4 1250 2143@14F 2143