scholarly journals Study on optimization of low carbon renewal system for residential area

2018 ◽  
Vol 188 ◽  
pp. 012060
Author(s):  
G C Zhao ◽  
X F Yu ◽  
J S Fan
Keyword(s):  
Residential Area ◽  
Low Carbon ◽  
Renewal System

Plant Landscape Design Research of Urban Residential Area Based on Low-Carbon Concept

2013 ◽  
Vol 357-360 ◽  
pp. 2059-2062
Author(s):  
Ying Li ◽  
Li Liu ◽  
Xin Li
Keyword(s):  
Experimental Data ◽  
Water Conservation ◽  
Design Research ◽  
Carbon Sink ◽  
Landscape Design ◽  
Residential Area ◽  
Residential Construction ◽  
Low Carbon ◽  
Living Area

This paper analyzes urban plant landscape in the aspect of energy and water conservation, microclimate regulation based on the concept of low carbon. The experimental data shows that the scientific and effective carbon sink design make the low carbon residential construction feasible. And the results verify that plant landscape play an important role in the construction of urban low-carbon living area.

scholarly journals Planning for a Low Carbon Future? Comparing Heat Pumps and Cogeneration as the Energy System Options for a New Residential Area

Energies ◽  
2015 ◽  
Vol 8 (9) ◽  
pp. 9137-9154 ◽  
Author(s):  
Jukka Heinonen ◽  
Jani Laine ◽  
Karoliina Pluuman ◽  
Eeva-Sofia Säynäjoki ◽  
Risto Soukka ◽  
...  
Keyword(s):  
Energy System ◽  
Heat Pumps ◽  
Residential Area ◽  
Low Carbon

Explore the Energy-Saving Comprehensive Renovation of Existing Residential Buildings in Cold Areas ― Taking Taiyuan University of Technology ChangFeng Residential Area as an Example

2013 ◽  
Vol 838-841 ◽  
pp. 2865-2869
Author(s):  
Liang Qin
Keyword(s):  
Sustainable Development ◽  
Construction Management ◽  
Environmental Problem ◽  
Residential Buildings ◽  
Residential Area ◽  
Low Carbon ◽  
Leading Role ◽  
University Of Technology ◽  
The World ◽  
New Material

With the environment increasingly worsening, global warming has become an environmental problem challenged around the world. The cognition of low carbon and environmental protection has been widely spread and applied in urban planning construction. Universities are the frontiers of scientific research. At university such aspects like construction energy conservation and the use of new material have been put into practice, and under the guidance of planning, construction, management departments and others, the ideas of low carbon and ecology is promoted to build the campus with sustainable development. Universities play a leading role for all walks of life in society.

A Discussion on Feasibility of Improving Using of Rain in Residential Area Waterscape

2014 ◽  
Vol 1065-1069 ◽  
pp. 2839-2842
Author(s):  
Sun Yue ◽  
Yun An Yang
Keyword(s):  
Water Quality ◽  
Environmental Protection ◽  
Resource Conservation ◽  
Residential Area ◽  
Low Carbon ◽  
Residential Areas ◽  
The Difference ◽  
The Way

This research combines the rain with residential area waterscape together. Through the survey, we find some commom problem that the water quality is poor and some waterscapes often have no water and the waterscape design is stylized in residential area waterscape and analyse reason, then put forward the way to solution the problem in waterscape by rain.In order to effectively use rainwater to waterscape, considered the difference between the pluvial region with the little rain region, compared the different features of middle-small and large residential areas, adopted different measures. Topic significance lies in the concept of low carbon environmental protection can be incorporated into people’s lives, improve people’s awareness of resource conservation.

Application Mode of Low-Carbon Economy for “Green Residence”

2012 ◽  
Vol 524-527 ◽  
pp. 2486-2489
Author(s):  
Jun Hu ◽  
Du Jiang
Keyword(s):  
Building Materials ◽  
Water System ◽  
Energy System ◽  
Residential Area ◽  
Biomass Energy ◽  
Low Carbon ◽  
Low Carbon Economy ◽  
Application Mode ◽  
Heat Preservation ◽  
Carbon Economy

Global energy shortages and climate change promote low-carbon economy become an important research focus. The application mode of low-carbon economy in the construction of new residential area has important theoretical and practical value for the promotion of sustainable development in resource-based society. In this paper, a “Green residence” mode is discussed by using the low-carbon technology of heat preservation and the renew resources application. The “Green residence” integrates the ecological energy resources such as solar energy system, biomass energy, gray-water system and building materials. The mode focuses on the environmental protection and low-carbon emission, and tries to provide some guide for the construction of new residential area.

S.E.M.-T.E.M. Image Comparison

1971 ◽  
Vol 29 ◽  
pp. 132-133
Author(s):  
G. M. Greene ◽  
J. W. Sprys
Keyword(s):  
Electron Microscope ◽  
Low Carbon Steel ◽  
Secondary Emission ◽  
Low Carbon ◽  
Preparation Time ◽  
Actual Surface ◽  
Fine Detail ◽  
Transmission Electron ◽  
Transmission Study ◽  
Large Sections

The present study demonstrates that fracture surfaces appear strikingly different when observed in the transmission electron microscope by replication and in the scanning electron microscope by backscattering and secondary emission. It is important to know what form these differences take because of the limitations of each instrument. Replication is useful for study of surfaces too large for insertion into the S.E.M. and for resolution of fine detail at high magnification with the T.E.M. Scanning microscopy reduces sample preparation time and allows large sections of the actual surface to be viewed.In the present investigation various modes of the S.E.M. along with the transmission mode in the T.E.M. were used to study one area of a fatigue surface of a low carbon steel. Following transmission study of a platinum carbon replica in the T.E.M. and S.E.M. the replica was coated with a gold layer approximately 200A° in thickness to improve electron emission.

Lattice Imaging of Twin, Lath and α/Martensite Boundaries in Duplex Low Carbon Steels

1977 ◽  
Vol 35 ◽  
pp. 118-119
Author(s):  
J. Y. Koo ◽  
G. Thomas
Keyword(s):  
High Resolution Electron Microscopy ◽  
Ferrite Matrix ◽  
Carbon Steels ◽  
Bright Field Image ◽  
Low Carbon ◽  
Lattice Imaging ◽  
Bright Field ◽  
Lattice Image ◽  
New Information ◽  
Resolution Electron

High resolution electron microscopy has been shown to give new information on defects(1) and phase transformations in solids (2,3). In a continuing program of lattice fringe imaging of alloys, we have applied this technique to the martensitic transformation in steels in order to characterize the atomic environments near twin, lath and αmartensite boundaries. This paper describes current progress in this program.Figures A and B show lattice image and conventional bright field image of the same area of a duplex Fe/2Si/0.1C steel described elsewhere(4). The microstructure consists of internally twinned martensite (M) embedded in a ferrite matrix (F). Use of the 2-beam tilted illumination technique incorporating a twin reflection produced {110} fringes across the microtwins.

Characterization of carbides in M50NiL

1991 ◽  
Vol 49 ◽  
pp. 606-607
Author(s):  
L. S. Lin ◽  
K. P. Gumz ◽  
A. V. Karg ◽  
C. C. Law
Keyword(s):  
Temperature Effects ◽  
Base Composition ◽  
Lattice Parameter ◽  
Control Surface ◽  
Carbide Formation ◽  
Particle Sizes ◽  
Low Carbon ◽  
Fee Structure ◽  
Heat Treated

Carbon and temperature effects on carbide formation in the carburized zone of M50NiL are of great importance because they can be used to control surface properties of bearings. A series of homogeneous alloys (with M50NiL as base composition) containing various levels of carbon in the range of 0.15% to 1.5% (in wt.%) and heat treated at temperatures between 650°C to 1100°C were selected for characterizations. Eleven samples were chosen for carbide characterization and chemical analysis and their identifications are listed in Table 1.Five different carbides consisting of M6C, M2C, M7C3 and M23C6 were found in all eleven samples examined as shown in Table 1. M6C carbides (with least carbon) were found to be the major carbide in low carbon alloys (<0.3% C) and their amounts decreased as the carbon content increased. In sample C (0.3% C), most particles (95%) encountered were M6C carbide with a particle sizes range between 0.05 to 0.25 um. The M6C carbide are enriched in both Mo and Fe and have a fee structure with lattice parameter a=1.105 nm (Figure 1).

Thermomechanical Treatment of a 4340 Ni-Cr-Mo Alloy Steel

1981 ◽  
Vol 39 ◽  
pp. 314-315 ◽  
Author(s):  
M.T. Jahn ◽  
J.C. Yang ◽  
C.M. Wan
Keyword(s):  
Mechanical Property ◽  
Chemical Composition ◽  
Alloy Steel ◽  
Thermomechanical Treatment ◽  
Room Temperature ◽  
Good Combination ◽  
Thermal Treatments ◽  
Low Carbon ◽  
4340 Steel ◽  
Good Improvement

4340 Ni-Cr-Mo alloy steel is widely used due to its good combination of strength and toughness. The mechanical property of 4340 steel can be improved by various thermal treatments. The influence of thermomechanical treatment (TMT) has been studied in a low carbon Ni-Cr-Mo steel having chemical composition closed to 4340 steel. TMT of 4340 steel is rarely examined up to now. In this study we obtain good improvement on the mechanical property of 4340 steel by TMT. The mechanism is explained in terms of TEM microstructures4340 (0.39C-1.81Ni-0.93Cr-0.26Mo) steel was austenitized at 950°C for 30 minutes. The TMTed specimen (T) was obtained by forging the specimen continuously as the temperature of the specimen was decreasing from 950°C to 600°C followed by oil quenching to room temperature. The thickness reduction ratio by forging is 40%. The conventional specimen (C) was obtained by quenching the specimen directly into room temperature oil after austenitized at 950°C for 30 minutes. All quenched specimens (T and C) were then tempered at 450, 500, 550, 600 or 650°C for four hours respectively.

The microstructure change of low-carbon electrical steels by residual aluminum

1989 ◽  
Vol 47 ◽  
pp. 286-287
Author(s):  
C.K. Hou ◽  
C.T. Hu ◽  
Sanboh Lee
Keyword(s):  
Annealing Treatment ◽  
Low Carbon ◽  
Electrical Steels ◽  
Vacuum Degassing ◽  
Spherical Inclusions ◽  
Residual Aluminum ◽  
Average Grain Size ◽  
The Matrix ◽  
Fine Size ◽  
To Come

The fully processed low-carbon electrical steels are generally fabricated through vacuum degassing to reduce the carbon level and to avoid the need for any further decarburization annealing treatment. This investigation was conducted on eighteen heats of such steels with aluminum content ranging from 0.001% to 0.011% which was believed to come from the addition of ferroalloys.The sizes of all the observed grains are less than 24 μm, and gradually decrease as the content of aluminum is increased from 0.001% to 0.007%. For steels with residual aluminum greater than 0. 007%, the average grain size becomes constant and is about 8.8 μm as shown in Fig. 1. When the aluminum is increased, the observed grains are changed from the uniformly coarse and equiaxial shape to the fine size in the region near surfaces and the elongated shape in the central region. SEM and EDAX analysis of large spherical inclusions in the matrix indicate that silicate is the majority compound when the aluminum propotion is less than 0.003%, then the content of aluminum in compound inclusion increases with that in steel.

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