18-2 The heat pump and structure whose characteristics are shown in Fig. 18-6 are in a region where the design outdoor temperature is -15°C. The compressor of the heat pump uses two cylinders to carry the base load and brings a third into service when needed. The third cylinder has a capacity equal to either of the other cylinders. How much supplementary resistance heat must be available at an outdoor temperature of -15°C? Ans. 5.8 kW. Energy flow rate, kW 24 22 20 18 16 14 12 10 8 00 T New balance point -20 Balance point -10 Additional capacity Heat loss of structure 10 Outdoor-air temperature, "C Figure 18-6 Balance points of heating capacity and heating load. Heating capacity 20
18-2 The heat pump and structure whose characteristics are shown in Fig. 18-6 are in a region where the design outdoor temperature is -15°C. The compressor of the heat pump uses two cylinders to carry the base load and brings a third into service when needed. The third cylinder has a capacity equal to either of the other cylinders. How much supplementary resistance heat must be available at an outdoor temperature of -15°C? Ans. 5.8 kW. Energy flow rate, kW 24 22 20 18 16 14 12 10 8 00 T New balance point -20 Balance point -10 Additional capacity Heat loss of structure 10 Outdoor-air temperature, "C Figure 18-6 Balance points of heating capacity and heating load. Heating capacity 20
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter48: Cooling Towers And Pumps
Section: Chapter Questions
Problem 13RQ
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