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Development of temperature-humidity Independent Control Air-Conditioning Unit for Residential Buildings

湖南大学学报（自然科学版） 2009年第S1期36卷 83-87页

作者： HAN Xing1,ZHANG Xu1,LIU Jin-tao2,GAO Si-yun2,KANG Yue2(1.Institute of HVAC & Gas,College of Mechanical Engineering,Tongji University,Shanghai 200092,China 2.Hisense R&D Center,Qingdao,266000,China) Institute of HVAC and Gas College of Mechanical Engineering Tongji University Shanghai 200092 China Hisense R and D Center Qingdao 266000 China

Cooling panels are increasingly used in domestic residential *** provide medium temperature cold water for the cooling panel,and dehumidify the indoor air simultaneously,a new kind of temperature-humidity independent control air-conditioning unit was developed for single residential house by utilizing multi-variable ***,the supply air temperature was studied to determine the proper supply air flow rate for the humidity ***,the energy consumption of different temperature-humidity independent control systems was *** analysis indicates that unity evaporating temperature can be used to handle the moisture load and sensible heat load in two *** the unit scheme was put *** evaporators were used to produce medium temperature water and dry air separately,and electric expansion valves were used to control the refrigerant distribution between the two ***,experimental work was carried out to investigate the influence of compressor frequency,refrigerant distribution on the dehumidification capacity,energy efficiency and refrigeration *** the end,the paper concludes that both compressor frequency and refrigerant distribution can control the dehumidification capacity,but the former influences the EER more than the latter,while the latter influences the refrigeration capacity more than the *** can find a proper running point at certain sensible and latent cooling load by adjusting both compressor frequency and electric expansion *** energy consumption of this kind of unit was estimated and compared with present room air conditioners,which shows that it can save about 41% cooling energy consumption.

关键词： temperature-humidity independent control residential buildings cold dehumidification experimental study

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A Methodology for Identification of Weather Sensitive Component of Electrical Load Using Empirical Mode Decomposition Technique

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Energy and Power Engineering 2013年第4期5卷 293-300页

作者： Nahid-Al- Masood Q. Ahsan Department of Electrical and Electronic Engineering Bangladesh University of Engineering and Technology Dhaka Bangladesh

The expansion planning and operation of all three sectors, generation, transmission and distribution, of power system essentially require load forecasting. Weather conditions have significant impacts on forecasted load, especially short-term and mid-term. A momentous portion of the electrical energy is consumed, especially in cold or hot countries, to mitigate the impact of weather on the daily life of human society. Usually, weather dependent component of load is identified by fitting appropriate non-linear curve to the scatter plot of weather-load model. This technique some times shows lower correlation with weather variables. This paper proposes a new methodology to identify the weather sensitive component of electrical load using empirical mode decomposition (EMD) technique. The proposed methodology is applied to the daily peak load of Dhaka zone of Bangladesh Power System (BPS) of the year 2012. A detailed numerical process to evaluate the weather sensitive portion of the load is also presented. The proposed methodology is validated through statistical error evaluation process. Finally the salient features of the results are discussed.

关键词： Load Weather Sensitive Component EMD temperature-humidity Index Correlation Coefficient

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