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Steady state modeling of advanced vapor compression systems.

Number: pap. 2067

Author(s) : BESHR M., AUTE V., RADERMACHER R.

Summary

The use of heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems is always increasing. This is because the HVACR systems are necessary for food production and ability to inhabit buildings that otherwise would be inhabitable. Thus, there is continued research focused on improving the efficiency and reducing the negative environmental impact of these systems. The basic vapor compression cycle (i.e., evaporator, condenser, expansion device and compressor), which is still the main underlying HVAC&R technology worldwide, has already reached its limits and researchers are investigating more creative and complex cycles to improve capacity and efficiency. This motivates the development of a generalized vapor compression system simulation platform. Steady state simulations require less time than transient simulations, and are used in system design optimization and cost minimization for given performance. This paper presents a comprehensive vapor compression system steady state solver which has several novel features compared to the existing solvers. Firstly, this solver is capable of simulating large number of different vapor compression system designs. This includes arbitrary system configurations, and user defined refrigerants. The solver uses a component-based solution scheme in which the component models are treated as black box objects. This allows a system engineer to quickly assemble and simulate a system where-in the component models and performance data comes from disparate sources. This allows different vapor compression systems design engineers, and manufacturers to use the solver without the need to expose the underlying component model complexities. We validate the solver using a residential air source heat pump system and the modeling results match the experimental results within 5% accuracy. Also, the solver shows an agreement within 10% accuracy with the experimental results of a vapor injection heat pump system with a flash tank.

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Pages: 9

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Details

  • Original title: Steady state modeling of advanced vapor compression systems.
  • Record ID : 30018899
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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