Applied Mechanics and Materials Vols. 178-181

Abstract: The insulation material VIP in building offers a new material for highly insulated constructions with just a fraction of the required insulation thickness compared to conventional thermal insulation materials. A VIP is basically composed of the core material, the barrier film and getters. Core materials of VIP are glass fiber, fumed silica, fiber-powder composite core. The barrier film covered by glass fiber textile is the protection of the envelope against surface damage and fire attack. We introduce the VIP elements, the system of VIPs in building application and external thermal insulation system with VIP.

Abstract: Combined with the natural climate and geographical location feature of Inner Mongolia chosen refining indicators, this paper built the Residential building energy saving comprehensive evaluation index system referring to the standard of residential building energy efficiency design, and that proceeding from design constructing and operating stage of constructions.

Abstract: Use Interval Number Comparison Matrix to conduct a quantitative and comparative analysis on solar water heating system of civil buildings for the following six aspects: Systems and Building Integrated, System Application Performance, System Security, System Durability, System Economy, and System Components. By constructing a hierarchical model, we establish an interval number comparison matrix, determine the consistency and solve their weight vector. Based on the possibility, it finally make out the degree of evaluation index, provides the design and evaluation of actual solar heating system with decision-making basis.

Abstract: The development of energy saving technologies is very actual issue of present day. One of perspective directions in developing these technologies is the thermal energy storage in various industry branches. To meet the requirement of high temperature of solar heat transfer and thermal storage, this paper calculated several sets of data for lots of pure salts and salt mixtures. The results show that, comparing with the ternary carbonate salt (potassium carbonate (0.7) - sodium carbonate (0.1) -potassium chloride (or sodium chloride)), the ternary chloride salt (potassium chloride (0.037) - calcium chloride (0.5) - sodium chloride) is more perspective.

Abstract: In this paper, the current situation of the house and the features of the climate in Shihezi were introduced. Based on the analysis of energy consumption, a real existing project in rural existing house of Shihezi was taken as an example to carry out the analysis of energy consumption with the software of DeST-h. Furthermore, the economic evaluation was given out. The results indicated that the satisfactory economic benefits of energy-saving retrofit could be achieved with the appropriate energy-saving reform plan.

Abstract: This paper studies the influence factors on building energy consumption in China. The data resources are extracted from 12 dissertations. By method of analysis of covariance, the effect of each influence factor on energy consumption is discussed. By method of multiple correspondence analysis, the cluster of “low energy factor” is found. By method of extended two-factor theory, the measures to reduce building energy are provided.

Abstract: This paper proposes a solar combisystem model with biomass boiler as its auxiliary heat source. Taking specific constructions of towns into consideration, solar combisystems with four different auxiliary heat sources——gas boiler, electric boiler, coal boiler and biomass boiler are compared from the aspects of comprehensive energy price, CO₂ emissions and social benefits. The results show that, compared with the solar combisystems with conventional energy boilers as their auxiliary heat sources, the system with biomass boiler as its auxiliary heat source has favorable economic, social and environmental benefits.

Abstract: Underground water source heat pumps system is an underground geothermal technology that extracts underground water as a lower temperature heat source, and recharged into the same aquifer after heat exchanger. During the recharging process, not only external microorganisms such as bacteria but also a variety of contaminants ( for example carbon sources, nitrogen sources, the growth inhibitors/promoters and so on) would get into the aquifer to affect the aquifer's living environment for microbial, which would affect the quality of underground water directly or indirectly. Not only that, the extraction and injection of underground hot water would cause the redistribution of temperature, which would then affect the growth of microorganisms as a key affecter. And the biomass would be transported by seepage flow in way of advection and conduction mainly. Based on the background of underground water source heat pumps system, the coupling of three-field (temperature-hydraulic-microbial) is analyzed, and a corresponding coupled THB model is obtained. Taking Escherichia coli as target organisms in the aquifer, the distribution of biomass various with time and space are obtained respectively. The temperature and advection sensitivity of microbial concentration is also acquired. It is showed that the growth of microbial plays a great role in the process of its transportation, and the concentration of microbial would increase significantly when the local temperature increased or the convection strength decreased while other effects stay the same.

Abstract: Climate characteristics of Shihezi area, present passive solar building planning and design of residential and architectural design requirements; Through the improvement of traditional passive solar heating system, and adopt collection hot wall completely cover housing south wall and other measures to improve thermal efficiency sets. To pilot project as an example, the use of SLR method calculated, the system, in Shihezi the coldest month is January, solar fraction can reach 31%.

Abstract: City highway tunnel ventilation design is one of the key processes in whole tunnel design. The ventilation design has important influence in ventilation sanitation effect, equipment investment, operations energy consumption and operations cost. On the premise of safety and sanitation, if city tunnel adopts natural ventilation, this can reduce energy consumption, construction cost and operations cost. Combining practical conditions of a project, this paper evaluated three kinds of mechanical ventilation, and analyzed contrastively economic efficiency of the natural ventilation and the jet longitudinal ventilation. At last drew the conclusion that the natural ventilation can reduce the total investment by 30% and has obvious energy-saving efficiency, then put forward the pertinent suggestions to the ventilation construction of highway tunnel.