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Simulation of a R410A residential air-conditioning system with round-tube and/or microchannel evaporators and condensers under both dry and wet air conditions.

Number: pap. 2303

Author(s) : ZOU Y., LI H., HRNJAK P.

Summary

A system model is developed to simulate the performance of a residential air-conditioning system. The system model includes detailed component models of evaporator, compressor, condenser and expansion valve, while these component models are linked through refrigerant mass flow rate, pressure and enthalpy. The inputs into the system model are air inlet conditions as well as the evaporator superheat and condenser subcooling on the refrigerant side. The system model is validated against the experimental results of a 2.5 ton residential air-conditioning system in Air-Conditioning and Refrigeration Center at University of Illinois. The experiment was conducted based on AHSI/AHRI standard 210/240 at Conditions A, B (wet coils) and C (dry coil). The baseline system contains round-tube evaporator and condenser, while the same system with the indoor round-tube evaporator being replaced with a microchannel evaporator is also tested. The system model shows good accuracy compared to the experimental results. The capacity and COP are within 4.3% and 7.9% for the direct expansion systems, respectively. The saturation temperatures calculated from superheat and subcooling are within ±2°C. The system model is applied further to investigate the benefits of replacing both round-tube evaporator and condenser with the microchannel evaporator and condenser. The simulation results show that it is possible to achieve COP improvement by 21.1% in the wet condition and 27.8% in the dry condition.

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Pages: 10 p.

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Details

  • Original title: Simulation of a R410A residential air-conditioning system with round-tube and/or microchannel evaporators and condensers under both dry and wet air conditions.
  • Record ID : 30019015
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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