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Ma Q.,Beijing University of Technology | Liu Z.,Beijing University of Technology | Hao Y.,State Nuclear Electrical Power Planning Design and Research Institute | Liu T.,China Household Electrical Appliance Research Institute
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2010

As a new absorption refrigeration system, NaSCN-NH3 diffusion absorption refrigeration system uses a solution of an inorganic salt compound as the absorbent, ammonia as the refrigerant. This paper presents some parameters that affecting on the performance of NaSCN-NH 3 diffusion absorption refrigeration system. By comparing simulation and experimental data, the results show that the COP of NaSCN-NH 3 diffusion absorption refrigeration device set to 2 kW cooling capacity can reach 0.4, when the regeneration temperature is 80°C∼105°C, the concentration is 0.38∼0.5 and condensation temperature is 30°C. ©2010 IEEE.


Liu Z.,Beijing University of Technology | Yang S.,Beijing University of Technology | Liu T.,China Household Electrical Appliance Research Institute
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2012

The compared experimental tests were carried out to investigate the operation performances of a solar photovoltaic DC refrigerator using a phase change material (PCM), a photovoltaic DC refrigerator without PCM and a household one. The photovoltaic DC refrigerator using PCM has many advantages for on-off frequency of the compressor, service factor and heat insulation time as compressor stopped, so to prolong the service life of the compressor effectively. Furthermore, the system is powered by solar energy completely without consuming any grid electricity for running, and is the "green household electric appliance" on real significance, that especially suitable for remote mountains and nomadic areas of fresh food and medical supplies of vaccine, etc.


Wu S.,China Household Electrical Appliance Research Institute | Li H.,Beijing University of Technology | Cheng J.,China National Institute of Standardization | Tian C.,Beijing University of Technology
Applied Thermal Engineering | Year: 2012

The promotion of Energy Efficiency Standards and the implementation of Energy Labels have greatly improved energy efficiencies of Chinese refrigeration products in recent years. These products are now moving towards multiple heat sources and multiple functions, to obtain further energy-savings. Some typical products, such as solar energy refrigerators and air conditioning-water heater system are introduced. The current energy efficiencies of Chinese refrigeration products are also introduced in this paper. Some recommendations are given to make the standards accommodate these changes. © 2012.


Yang S.,Beijing University of Technology | Liu Z.,Beijing University of Technology | Ma Q.,Beijing University of Technology | Zhang Q.,Beijing University of Technology | Liu T.,China Household Electrical Appliance Research Institute
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2010

At present, ducted air-conditioning (AC) unit is characterized of high efficiency, convenient installation, fresh air, less initial investment, etc. It has been widely used in restaurant, supermarket and factory workshop. This paper analyses advantage and disadvantage of the capillary tube, single ported thermostatic expansion valve, double ported thermostatic expansion valve. Especially, modern large-scale buildings make indoor and outdoor unit' placing distance very far, how to ensure reliable running of the system of long tube is important, and proposed a method that making the balanced port thermostatic expansion valve and capillary tube run parallel connection, which ensuring reliable operation of the system of long tube. ©2010 IEEE.


Qiang Z.,Beijing University of Technology | Liu Z.,Beijing University of Technology | Yang S.,Beijing University of Technology | Ma Q.,Beijing University of Technology | Liu T.,China Household Electrical Appliance Research Institute
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2010

The two-stage water evaporative cooling system (TSEC) has advantages of lower energy consumption, lower costs, higher environmental friendly and higher cooling efficiency than the direct water evaporative cooling system (DEC) and the indirect water evaporative cooling system (IEC). The experimental and theoretical analysis in this paper results show that the TSEC system not only has favorable application prospect in the dry region of the Northwest of China, but also has abroad application in the medium humidity areas. But it is not applicable in the south with large humidity in summer. ©2010 IEEE.

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