Advanced Materials Research Vols. 374-377

Abstract: The stability of interface between bond cement and tubular steel is very important to the integrality of oil and gas wells. However, research on the degradation of the interface in aggressive solution is absent to date. This work devotes to discover the relationship of electrochemical parameters and interfacial development during early stage of corrosion by analyzing the electrochemical results. Dielectric spectroscopy obviously describes the stability change of passive film of steel, and Bode plot supports the structure change of cement. The early stage of immersion in aggressive solution is dominated by competition of hydratation and corrosion.

Abstract: The temperature and humidity profiles in spatial and temporal field inside the greenhouse are coupled to outside climates. Took a typical soil-walled passive greenhouse located in Jinan, Shandong, China as an example, an unsteady tri-dimensional numerical simulation was applied to solve the temperature and humidity profiles under natural ventilation conditions inside the greenhouse, based on the CFD program. The measurement was carried out to validate the CFD model, the results showed that the special temperature and humidity gradient were obvious inside the greenhouse, a homogeneous temperature and humidity field was obtained at crop level. The simulation results agree well with test values about the temperature and humidity inside the greenhouse with fitting degree of 99.8% and 99.7%, respectively. With high reliability, the model can be used as the basis to predict and control the environment inside the greenhouse. Greenhouse with natural ventilation under different wind conditions was simulated on a typical sunny day to predict the distribution of air flow, temperature and humidity field. By analyzing, some useful conclusions which can provide certain basis about the influence of natural ventilation on the thermal and moisture environment are deduced.

Abstract: With the development of resource economizing social, green building is being paid more attention at present, and also offers wider development space for water conservation technology. Water conservation evaluation is accordingly becoming an important part in green building study. A green residential area in Xi’an, which including a series of water conservation project such as water saving instrument, reclaimed usage of domestic greywater and rainwater, landscape water protection and so on, is selected as a study case. With evaluating its water conservation of incremental cost, rainwater utilization and comprehensive benefit, the paper aims at consulting on the investment decision in green building’s water conservation technology to reduce the environmental impact on the earth due to water consumption and wastewater discharge.

Abstract: In order to improve human thermal comfort of residential buildings in urban village, the study of indoor thermal environment is necessary. Three typical selected houses in Huangpu Village were taken as an example to study. After a seven-day field measurement under the condition of natural ventilation, thermal neutral temperature and PMV indices were calculated based on the collected data. It is shown that the PMV values of the houses vary from -0.5 to 2.1, and the acceptance rate differ significantly in different houses and human activities states. The parameters including outdoor air temperature, indoor air temperature and PMV were studied through the linear regression, and the results demonstrate that their correlation coefficients are high, and their relationships have been developed. The results of this work create a precedent for the indoor thermal environment design and control of urban village buildings in China.

Abstract: Abstract: This study investigated to eliminate the nitrogen load of sediment from Yangzhou ancient canal capping with an active barrier system (ABS) using two kinds of zeolite with five different coverage densities. For ABS capping with zeolite F1 when the zeolite dose is low (0.21 kg/m2 and 0.62 kg/m2), it is found that ABS failed to achieve good control in preventing N release in the entrophic sediments as total nitrogen (TN) concentrations of overlying water were increased to 3.76 mg/L and 3.13 mg/L, respectively after 16 days. However, when zeolite density was increased to 1.04 kg/m2, TN concentration of overlying water decreased to 1.94 mg/L and TN removal efficiency is up to 50% after 16 days. For ABS capping with zeolite F2 TN concentration of overlying water is reported to descend in both low dose and high dose series. It is found that zeolite F2 is unfit for remediation of sediments from ancient Canal in Yangzhou because the ability in preventing release of ammonia nitrogen from sediments is weak. A possible explanation is that microorganism attaching on surface of two zeoltes differs to cause large difference of removal capacity between zeolite F1 and zeolite F2. It is found that nitrification and denitrification is the principal pathway for the former one while nitrite accumulation appears in the latter. To sum up, the capacity of eliminating TN load by zeolite F1 is stronger than that by zeolite F2, the optimum capping density of zeolite F1 is 1.04 kg/m2.

Abstract: With the rise of low-carbon economy, more and more investors understand and accept the concept of sustainable development, some investors have gradually shifted business focus to green buildings, but most are still on the sidelines. For investors, the most important consideration in their decision-making is the project's future benefits. The main aim of this paper is to identify incremental return on incremental costs of green buildings from the real estate investor’s perspective by analyzing a green residential building project. Based on the detailed analysis of incremental costs and benefits of the green building, the paper obtains the incremental investment rate of return using incremental analysis method. It certifies that there is a large benefit space for the developers to invest in green buildings.

Abstract: Since the water resourse insome towns of Beijing were in a big shortage in the past few years, it becomes a key factor which restricts the sustainable development and theurbanlization of Beijing. Based on the fact, this paper introduces the reserrch situation and development of the ecological footprint of urban water resourse in Beijing. And it puts forward the method for calculating the the ecological footprint of urban water resourse , includeing domestic water, process water and eological water, in Beijing. Furthermore, the computational method of ecological carrying capacity and ecological deficit of urban water resourse in Beijing is proposed, which provides reference for the evaluation of ecological capacity of urban water resourse in Beijing.

Abstract: According to different sources of using sewage, it can be divided into untreated sewage and reclaimed water. The wastewater treatment station in Shandong Jianzhu University is used as the experimental base in this paper. The components from school life sewage was received. The growth regulation of fouling on the surface of PE pipe in untreated sewage and the maximum thickness of fouling growth was found through biological electron microscopy.

Abstract: A kind of new combined modeling method with GM(1,1) and RBNN (Radial Basis Neural Network) is brought forward, according to the idea that the method of neural network can bring grey prediction model a good modified effect. Based on the analysis of the energy consumption data of the existing and the annually-increased building area, the GM(1,1) model was then constructed. And the RBF neural network was used for the model residual error revising. The simulation and experiment results show that the novel model is more effective than the common grey model.

Abstract: At present, the rural distribution includes Dispersed Type (DT) and Residential type (RT). In this paper, the structure system of investment management with global optimization was suggested to resolve drawbacks caused by conventional-style biogas investment management mode. The Investment Management with Global Optimization consists of four modules: examination content optimization (ECO), follow-up service content optimizing (FSCO), start optimizing (SO), consolidate optimization (CO). Four modules work coordinately to promote household biogas will be Efficient, sustainable and stable development. Finally, an example is described in detail to show the organizational structure of global optimization and its operation modes.