Applied Mechanics and Materials Vols. 291-294

Abstract: The plug-in hybrid electric vehicles (PHEVs) have the potential of petroleum displacement with electric energy. The dynamic model and control strategy for PHEV are designed in this paper. Simulation models of PHEV components are built based on Simulink. The control rules of energy management and engine operation model are defined to improve the fuel consumption of the PHEV. Simulation results show that the efficiency of PHEV is improved with the proposed methods.

Abstract: In order to reduce the emission of the exhaust gases emitted by the vehicles, buses and taxies use of LPG is being promoted in Chinese big and medium-sized cities, how to reduce the emission by the LPG vehicles is a brand-new subject yet to be addressed. This thesis makes a comparative experimental research on the vehicles through adding a proper amount of CPG-4 synergist to the fuel of the LPG vehicles so as to ameliorate their combustion performance and reach the purpose of energy conservation and emission reduction. The experiments demonstrate that use of LPG can be saved by approximately 6% and the emission of HC and PM are also greatly reduced by adding a proper amount of CPG-4 synergist to the fuels of the LPG vehicles.

Abstract: The electric vehicle has the advantages of energy-saving, environmental protection, low-carbon economy etc, and the charging system is an indispensable subsystem of electric vehicle. It’s the charging long time and inconvenience of traditional charging mode that makes contactless charging system become the trend of future electric vehicle charging technology development. Firstly, this paper introduces the principle of contactless charging of electric vehicle, analysis the three kinds of charging mode, and then combined with the development of domestic and international situation, puts forward some inevitable problems in reality. Finally, discusses the contactless charging device for electric vehicle application.

Abstract: The paper introduces an intelligent maintenance and assessment simulation system for automotive air-conditioning. The system mainly includes the demonstration interfaces for working principle, refrigeration system, heating and gas distribution system, control system, assembling and disassembling training and assessment interface of compressor and clutch, and breakdown maintenance etc. Finally the faults simulation set up, description and repair instruction were introduced.

Abstract: This paper discusses the impact factors of the energy-saving and emission reduction benefits of electric vehicles. It compares the energy-saving benefits for different vehicle types. It also provides a modified method to calculate the results, so the local power companies can optimize the layout and the number of electric vehicles, improving the social benefits of electric vehicles.

Abstract: Since Industrial Revolution, fossil fuel has played an important role in technology, industry, and transportation, where an enormous amount of fossil fuel has been consumed, causing short supply. Transportation with other energy therefore has become the development objective for many countries. With the progress of technology, electric scooters have become popular because of the great supports of the governments. Corresponding to consumers’ demands, the requirements for functions and styles are also enhanced. With present engineering drawing and analysis software, this study aims to discuss the change of stress and fatigue endurance of welded electric scooter frames under loads. A real vehicle is proceeded road tests in order to verify the feasibility on various combinations of roads. The analyses show that, with proper design, the maximum stress of the self-weight of electric scooter frames or when considering carrying a person is lower than the yield stress of the frame itself. Regarding the fatigue endurance analyses, the operational life could satisfy the anticipation of the manufacturers to the functions. The research outcomes are expected to assist domestic manufacturers in designing new-style electric scooters or making improvement.

Abstract: The main methods and technologies of energy utilization for ecological buildings based on sustainable development are analyzed and the concept of ecological design is introduced. According to the way sustainable energy is used, ecological buildings can be classified into three types as green houses, biological buildings and self government buildings. Several examples of ecological design for these buildings are presented and discussed, such as passive heating, cooling with solar energy, improving natural ventilation and utilization of wind power, which are helpful to minimize the environmental impact and energy consumption in a sustainable way.

Abstract: Five greenhouses with different typical wall configurations were studied, including the hollow brick wall (HB), clay brick wall composed of mural column (MCCB), wall composed of fly ash air block brick (FAABB), clay brick wall composed of plum small hole column (PSHCCB), common clay brick wall with Styrofoam wall outside (SCB) to find out the effects of the north walls on the greenhouse microclimate. The interior temperature and RH environment, as well as the heating rate, cooling rate and the correlation with the outside temperature, were tested and compared, finding that the greenhouse with FAABB exhibits the optimal temperature and RH environment, and also the highest thermal stability. The findings may provide references for greenhouse construction and insulation measures.

Abstract: Energy consumption by rural residences accounts for large amount with Chinese economic development in an incredible speed. According to the survey of Bashang new rural of northwestern Hebei province by field test, villagers interview and questionnaire, this study made a profound analysis of general situation of the residences, lifestyle, energy consumption and residential thermal sensation, based on which, some results were proposed as follows: (1) south is the best orientation for rural residences of northwestern Hebei province; (2) combine function division and temperature division properly is advisable in period of design; (3) every function parts of the building should be tackled according to the background; (4) much attention should be paid on heat preservation in winter; (5) let villagers get to know the importance of energy saving may play an critic role in rural energy saving and building energy conservation.

Abstract: The building energy consumption is one of three in China's energy consumption, the detection and monitoring for energy consumption of building is the basis for the work of building energy efficiency. This article describes a perception, monitoring and management system of building energy consumption based on Internet of Things technology architecture, in the system, various energy instrumentation is installed inside the building and measurement all kinds of energy consumption data in the perception layer, collection daterminal data connected to the RS485 bus access gateway for data transmission via Ethernet or mobile communication network in the network layer and transport layer, deal with the statistical analysis of the energy consumption data in the application layer. The system has been successfully applied to more than 50 large-scale public building to implement energy consumption monitoring and management, and the support of the underlying data for building energy efficiency.