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Development of an emulator-based assessment method for representative evaluation of the dynamic performance of air conditioners.

Number: 2458

Author(s) : GIANNETTI N., ARIYADI H., MIYAOKA Y., JEONG J., SAITO K.

Summary

The systematic assessment of representative performance of air-conditioners poses a challenge in the testing reproducibility owing to the necessity of eliminating the influence of the characteristics of the testing facilities while dynamically reproducing both the air-conditioner side and the room-side air conditions. To overcome this challenge, this study presents the development of a hybrid testing facility for the assessment of the actual dynamic performance of air conditioners. The assessment method features a virtual room emulator and the testing equipment of the actual air conditioner, which can measure up to 14kW-capacity and reproduce outdoor air temperature between -7°C and 46°C. The virtual room emulator simulates the return indoor air condition to reproduce the dynamic interactions between specific conditioned environments, load condition and the cooling capacity of the air conditioner. Consequently, the air conditioner responds to the simulated indoor air conditions by supplying cooling capacity according to the response guided by its control system. The hardware and the software sides are interfaced through a measuring chamber and a condition generator. The measuring chamber measures the supplied cooling capacity by using the air-enthalpy method and provides the digital signal of the supply air condition to the virtual room emulator, whereas the condition generator converts the digital signal from the emulator into precisely controlled experimental conditions of the return air to the air conditioner.
The virtual room emulator and the technical solutions adopted to achieve sound repeatability and reproducibility of the testing results are presented and discussed to support the reliability of the proposed assessment technique. Specifically, the effect of the thermal capacity of the measuring chamber on the dynamic measurement of the air conditioner cooling capacity is quantified and design guidelines are provided to minimize this source of bias.

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  • Original title: Development of an emulator-based assessment method for representative evaluation of the dynamic performance of air conditioners.
  • Record ID : 30030737
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

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