Applied Mechanics and Materials Vol. 737

Abstract: Dual-site doped half-Heusler ZrNiSn alloys were prepared by arc melting. In order to diminish thermal conductivity of the alloys, as-casted ingots were sintered again by spark plasma sintering (SPS) technique after pulverizing and milling for several different periods of time. The electrical resistivity, thermoelectric powers and thermal conductivity of the sintered samples were measured from 4 to 350 K. A drastic reduction of thermal conductivity was obtained. The thermal conductivity decreased from about 17 to 1.5 W/K m and from 8.8 to 6.3 W/K m at 30 and 350 K, respectively. The dimensionless figure of merit of the half-Heusler alloys increased about 10%

Abstract: This template explains and demonstrates the interactive mode between electric vehicle and household electricity including photovoltaic power generation.The paper explores it from background and basic conditions, interaction analysis and control strategy, simulation and benefit calculation.

Abstract: This essay employed the "successive ion layer adsorption and reaction (SILAR)"technology to form PbSe/CdSe core/shell.We use the Pbse/CdSe core/shell replaced PbSe nanocrystals and obtained one new quantum dot solar cells of the inorganic.This new solar cells constituted by the metal oxide films retain the photoelectric conversion efficiency of quantum dot solar cells.At the same time,the stability of the new solar cells is tremendously improved with the oxidation resistance of inorganic oxide.Finally,when J_sc=25.2mA/cm²and V_oc=0.36V ,we can conclude the conversion efficiency of the solar cell can be evaluated as 3.929%.

Abstract: Today, new energy vehicles as low-power and clean means of transportation have been rapid development. Along with the people’s growing requirement for comfort, they should have a comfortable environment under different driving conditions. Therefore, the air conditioning system of high efficiency and energy saving is essential for new energy vehicles. This paper mainly introduces the present status and development trend of air conditioning system on new energy vehicles.

Abstract: Tars generated by oil sand pyrolysis at different temperature in a fixed bed reactor were studied through TLC-FID and GC-MS. Compared to the raw oil sand extracts, pyrolysis could reduce the asphaltenes of oil which is benefit for storage, transport and further utilization. The temperature of pyrolysis affects not only product yield but also its composition. Analyzed together by TLC-FID and GC-MS, groups of tars at different temperature were identified. It was found higher temperature would strengthen the condensation reactions revealing increasing of cycloalkanes, indenes and PAHs increased with raising temperature. There was also a great amount of benzothiophenes which may generated by the decomposition of oil sand bitumen or aromatization of ring sulfides. That mainly contributed to the high content of resin in the tars.

Abstract: This paper analyzes the relationship between crude oil price and fuel ethanol firm profit. Corn is the main raw material for fuel ethanol in China. According to our survey of fuel ethanol firms, three tons of corn input can produce one ton of fuel ethanol output technically, so we can estimate cost of fuel ethanol firms. Government of some provinces mandated gasoline with 10% ethanol fuel for environmental protection. Sinopec and PetroChina paid to the fuel ethanol firms in accordance with 0.911 times of gasoline price, so we can estimate earnings. Government can determine the subsidies of fuel ethanol firms based on estimation of their profit.

Abstract: From 2010 to 2012, Tongji University has constructed three solar houses to take part in Solar Decathlon and gained International prize for three years. This paper analyzed the architectural style and energy utilization of “Bamboo House”, “Y container”, “Eco-House”. And then described original ecology and energy-saving technology applied in these solar houses. Authors have provided some beneficial advises in material collection, hydroelectricity, natural ventilation, and effective energy utilization. The considerable development trend of solar building has inspired architects to pursue “Zero Energy” solar energy technology.

Abstract: Paper first analyzes the present state of development of building energy conservation field, the cost-benefit analysis of profit and loss balance analysis, based on the results of the analysis to study the each link of cost and benefit factors, establish the corresponding mathematical model, finally comprehensive analysis model results, to find a cost effective quantitative analysis method, whether for policymakers with building energy efficiency and carbon trading bring certain reference and basis.

Abstract: Microcapsules containing a curing agent, 2-phenyl imidazole (2PZ), for a diglycidyl ether of bisphenol A (DGEBA) epoxy resin were prepared by a solid-in-oil-inwater emulsion solvent evaporation technique with poly (methyl methacrylate) (PMMA) as a polymeric wall. The former could take more than 3 months at room temperature, whereas the latter was cured after only a week. The values of the reaction order (a curing kinetic parameter) for DGEBA/2PZ and DGEBA/2PZ–PMMA microcapsules were quite close, and this showed that the curing reactions of the two samples proceeded conformably. The curing mechanism was investigated, and a two-step initiation mechanism was considered: the first was assigned to adduct formation, whereas the second was due to alkoxide-initiated polymerization.

Abstract: The study of the building energy performance is based on simplified procedures that estimates the energy demand using monthly values of environmental parameters. It is well known that it is possible to use advanced dynamic softwares able to analyze the real building’s behavior along time. For this reason in this study a historical building energy retrofit has been performed through a dynamic software considering the influence of different kind of windowed elements on the annual energy demand. Four simulations, taking into account transparent elements characterized by progressively improved properties of thermal transmittance and solar gain factor, have been performed. The results obtained have been analyzed and compared.