Applied Mechanics and Materials Vols. 587-589

Abstract: The chemical pretreatment of rice straw was achieved via the liquid-state dissolution of CaCO₃. Pretreatment effects on the biodegradability and subsequent anaerobic production of methane were investigated. The results showed that the peak value of biogas production was attained of 4% CaCO₃ pretreatment on the 20^th day, which is 1 589 mL. The test daily methane content of different pretreatment conditions mainly ranges from 3.4% to 47.4%. The cumulative biogas production of 6% CaCO₃ pretreatment was the highest, about 19 917 mL.

Abstract: Corn bran was liquefied in phenol catalyzed by sulfuric acid at 120-180 °C. The liquefaction product (LCB) had groups of bound phenol and was considered as a precursor for synthesizing corn bran-based epoxy resin (LCBER). Namely, the phenolic OH groups of LCB reacted with epichlorohydrin under alkali condition. The structure and average molecular weights of LCB and LCBER in various reaction conditions were examined by FT-IR and GPC. Epoxy functionality was introduced to LCB and the extreme high molecular weight portion of LCBER-30 was obtained using LCB at 30 min as raw materials. LCBER was cured with polyamide-650 (PA-650) and the thermal and mechanical properties were evaluated. Comparing to the petroleum-based bisphenol-A type epoxy resin (DGEBA), LCBER presented higher adhesive shear strength and good thermal stability. These suggested that LCBER would be more suitable to glue biomass materials.

Abstract: The nanocrystalline materials for hydrogen storage offer a breakthrough in prospects for practical applications. Their excellent properties are from the combined engineering of many factors: alloy composition, surface properties, microstructure, grain size and others. Nanoengineering can speed up the kinetics, lower the enthalpy of formation and reduce the temperature of releasing hydrogen. The main focus is on the nanostructured metal hydrides, preparing nanograined materials and the effects of nanomaterials on the hydrogen storage properties in this review.

Abstract: The goal of this paper is to discuss whether building photovoltaic systems are suitable to be applied in Shanghai and Chenjiazhen in Chongming Island is taken as a typical example to be researched. Practical running data tested from building photovoltaic system of Chenjia Town ecological building and planning design of Building Integrated PV in Chenjia Town international ecological community were analysed. The research result was positive to use this energy system. Therefore, when new buildings in similar areas are planned to be designed, the designers should pay more attention to the applicable possibility of Building Integrated PV, which is beneficial to boost the use of renewable energy.

Abstract: A zero-energy building, also known as a zero net energy (ZNE) building, net-zero energy building (NZEB), or net zero building, is a building with zero net energy consumption and zero carbon emissions annually. Buildings that produce a surplus of energy over the year may be called “energy-plus buildings” and buildings that consume slightly more energy than they produce are called “near-zero energy buildings” or “ultra-low energy houses”. Traditional buildings consume 40% of the total fossil fuel energy in the US and European Union and are significant contributors of greenhouse gases. The zero net energy consumption principle is viewed as a means to reduce carbon emissions and reduce dependence on fossil fuels and although zero energy buildings remain uncommon even in developed countries, they are gaining importance and popularity.

Abstract: Currently, there exsits a Serious resource wasting phenomenon. In order to achieve the sustainable development of construction industry, the development of green building has become the inevitable choice of all countries in the world. This paper based on the sustainable development as the guiding ideology, through the basic theory of green building, based on the life cycle cost theory understanding as the foundation. First of all ,know the current situation of the development of green building cost at home and abroad, then according to the life cycle theory will be divided into green building decision-making, design, construction debugging, operation maintenance and recycling discarded five stages, points out the life cycle cost characteristics of green building.

Abstract: In the coordination development course between wind power and power grid, because of flexible operation ability, the combined cycle gas turbine (CCGT) can strength the inherent unit commitment performance such as reserve security and ramp limit with the result of improving the power grids wind power absorption capacity. Thus, CCGT included wind power system is one way of sustainable development for civil energy and environment. Because the price of gas is much more expensive than that of coal, taking aspects of economy, technique and environment into account, this paper sets up comprehensive risk evaluation for combined cycle gas turbine involved wind power system, which includes index such as system operation cost, environmental benefit, unit capacity utilization rate, heavy ramping rate lasting time, wind power utilization rate, et al. The exact index calculation method is focused on. The case study shows that the large volume of wind power could spoil the trend of system evaluation index and introducing CCGT could enhance the economy and reliability of power system and thus has superior practical value for grid-source coordination with large volume of wind power injection and refined management of generation schedule.

Abstract: In this paper, energy-saving ideas based on the “actual conditions” were proposed and the “actual condition” access method was presented. It provided reasonable reference for energy efficiency analysis and retrofit design for this kind of building of Urban Village in Wuhan.

Abstract: This paper is as an example of the hot water supply of the hotel in the city,The design of the hot water system is the solar energy and the air source heat pump,includes:the selection calculation of the air source heat pump of the water heater , the selection and calculation of the solar collector,the determination of the thermal storage tank and the determination of the circulating water pump of heat collecting .

Abstract: The energy consumption of a residential building Zhangjiakou area in different envelope was numerically simulated by using DeST software, and the influence factors on building energy consumption was analyzed, which provides a certain reference for optimization design of building structure Zhangjiakou region.