CIESC Journal ›› 2014, Vol. 65 ›› Issue (9): 3676-3679.doi: 10.3969/j.issn.0438-1157.2014.09.050

Previous Articles     Next Articles

Grading of dry-bulb and wet-bulb temperature allowances based on characteristics of performance curves

ZHANG Zhongbin1,2, DU Kai1, HUANG Hu2, ZHANG Ruonan2   

  1. 1 School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China;
    2 School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, Jiangsu, China
  • Received:2014-01-21 Revised:2014-04-30 Online:2014-09-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51176029), the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China (12KJB470010), the Prospective Study of Industry-University-Research Cooperation in Jiangsu Province, China (BY2013001-05) and the Foundation of Technology Transfer, Nanjing Normal University (2013-07).

Abstract: Based on performance test results, characteristics of cooling capacity (CC) and energy efficiency ratio (EER) change with indoor dry-bulb and wet-bulb temperatures (D&WBT) are examined. By applying corrected Akaike information criterion, best fit 3D surface equations of CC and EER are determined to obtain their variation gradients and corresponding intervals of gradient extrema. Based on the classification principle of keeping the maximum (minimum) EER variation rates between neighboring classes equal, D&WBT allowances in national standard are classified into three classes by using nonlinear classification, with the corresponding range of D&WBT in the union set of the intervals of gradient extrema of CC and EER as Class A, and the current D&WBT allowances set in the national standard as Class C. As an illustration of this new method, indoor D&WBT allowances under the cooling working condition are classified into Class A, B and C. The results show that the EER variation rate in Class A is as low as 1.04%, while that in Class C is 5.19%. It can be concluded that classified D&WBT allowances are more effective in evaluating the performance of a unit and valuable as a reference for revision of the national standard.

Key words: allowances, dry-bulb and wet-bulb temperature, room air conditioner, performance experiment, Akaike information criterion

CLC Number: 

  • TB61
[1] Li Xiaofeng (李晓凤), Ma Yitai (马一太), Yan Qiuhui (闫秋辉). Analysis on thermodynamic perfectibility of room air conditioners [J]. Journal of Refrigeration (制冷学报), 2013, 34 (1):18-23
[2] GB 12021.3-1989. The minimum allowable values of the energy efficiency and energy efficiency grades for room air conditioners [S]. Beijing: General Administration of Quality Supervision, Inspection and Quarantine of the PRC & Standardization Administration of the PRC, 1989
[3] GB 12021.3-2000. The minimum allowable values of the energy efficiency and energy efficiency grades for room air conditioners [S]. Beijing: General Administration of Quality Supervision, Inspection and Quarantine of the PRC & Standardization Administration of the PRC, 2000
[4] Energy Conservation Program: Energy Conservation Standards for Residential Clothes Dryers and Room Air Conditioners: Final Rule [S]. Washington, D.C.: US Department of Energy, 2011
[5] G/TBT/N/EEC/362 of the European Parliament and of the Council with regard to eco-design requirements for air conditioners and comfort fans [S]. Brussels: European Commission, 2011
[6] G/TBT/N/EEC/363 of the European Parliament and of the Council with regard to energy labeling of air conditioners [S]. Brussels: European Commission, 2011
[7] Calculating method of annual power consumption for room air conditioners JRA4046 [S]. Tokyo: The Japan Refrigeration and Air Conditioning Industry Association, 2005
[8] GB/T 7725-2004. Room air conditioners [S]. Beijing: General Administration of Quality Supervision, Inspection and Quarantine of the PRC & Standardization Administration of the PRC, 2004
[9] Hu Shuhua. Akaike information criterion [R]. Raleigh, North Carolina: Center for research in Scientific Computation, North Carolina State University, 2007
[10] Bozdogan H. Model selection and Akaike's information criterion (AIC): the general theory and its analytical extensions [J]. Psychometrika, 1987, 52 (3): 345-370
[11] Chang Youngho, Wong Joon Fong. Oil price fluctuations and Singapore economy [J]. Energy Policy, 2003, 31 (11): 1151-1165
[12] Erdal G, Erdal H, Esengün K. The causality between energy consumption and economic growth in Turkey [J]. Energy Policy, 2008, 36 (10): 3838-3842
[13] Halicioglu F. An econometric study of CO2 emissions, energy consumption, income and foreign trade in Turkey [J]. Energy Policy, 2009, 37 (3): 1156-1164
[14] GB 12021.3-2010. The minimum allowable values of the energy efficiency and energy efficiency grades for room air conditioners [S]. Beijing: General Administration of Quality Supervision, Inspection and Quarantine of the PRC & Standardization Administration of the PRC, 2010
[15] Kampanis N A, Delis A I, Antonopoulou D C, Kozyrakis G. A finite element discretization of the standard parabolic equation in generalized boundary fitting coordinates [J]. Applied Numerical Mathematics, 2013, 67: 152-166
[16] Liu Yang (刘洋), Wang Fang (王芳), Du Shichun (杜世春). Influence of environment on air conditioner performance [J]. Heating, Ventilation and Air Conditioning (暖通空调), 2006, 36 (11): 110-112
[17] Huang Hu, Li Qihe, Yuan Dongxue, Qin Zhenchun, Zhang Zhongbin. An experimental study on variable air volume operation of ducted air-conditioning with digital scroll compressor and conventional scroll compressor [J]. Applied Thermal Engineering, 2008, 28 (7): 761-766
[1] ZHANG Zhongbin, DU Kai, HUANG Hu, ZHANG Ruonan. Dry-bulb and Wet-bulb Temperature Allowances Grading Based on the Characteristics of Performance Curves [J]. CIESC Journal, 2014, 65(9): 0-0.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!