Jilin Institute of Architecture and Civil Engineering

www.jliae.edu.cn
Changchun, China

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Qi Z.,Jilin University | Qi Z.,Jilin Institute of Architecture and Civil Engineering | Gao Q.,Jilin University | Liu Y.,Jilin University | And 2 more authors.
Renewable and Sustainable Energy Reviews | Year: 2014

Hybrid energy systems (HES) facilitate the efficient utilization of renewable resources and sustainable energy, and they are expected to be more prevalent in the future. With ground source heat pump (GSHP) as the main body and core technology, the hybrid ground source heat pump (HGSHP) system is used frequently in recent years and its integration and synthesis skills face higher requirements. The worldwide hybrid system has usually been composed of types of energy source devices, such as solar collector, boiler (coal, gas, oil), electric heater, waste energy device, cooling tower, cooler, and thermal storage system with natural cold and hot. Actually, they lead to the complicated unsteady processes and various hybrid energy systems. In China, the applications of these systems are growing year by year, but the new technology breakthrough is being in difficulty and even in an awkward situation. This paper review the progress of GSHP combined with HES all over the world, and surveyed the development of HGSHP in China. Meanwhile, the basic proposals for development in the future are presented to make up the gap in the field of HES and HGSHP. A coming work aims to research the basic problems during the demonstration application, such as investigation of system design parameters, component configuration and control strategies of a HGSHP system. These problems will strengthen theoretical and practical understanding of HES and facilitate more extensive application of HGSHP in China. © 2013 Elsevier Ltd.


Zhao S.,Jilin Institute of Architecture and Civil Engineering | Chen C.,Jilin University
Advanced Materials Research | Year: 2013

Heat exchange tube with inclined boreholes is a new method that it is efficient and the exploitation and utilization of the underground thermal energy. This method can enhance the buried pipe heat intensity and reduce the area of drilling. This paper set up the model of heat exchange tube with inclined boreholes. Using the FLUENT to simulate the buried pipe mode of the three different direction in ground-source heat pump systems. © (2013) Trans Tech Publications, Switzerland.


Zhao S.,Jilin Institute of Architecture and Civil Engineering | Chen C.,Jilin University
Applied Mechanics and Materials | Year: 2013

Embedding heat exchange tubes in concrete piles is a new and efficient method of exploiting and utilizing of the underground thermal energy. By setting up the model of heat exchange tube embedded in concrete piles and using the star-ccm to simulate the three kinds of pipe burying modes, the paper manages to achieve the temperature field distribution map of the soil around and to analyze the economy of this heat accumulation technique. © (2013) Trans Tech Publications, Switzerland.


Li T.,Jilin Institute of Architecture and Civil Engineering
Advanced Materials Research | Year: 2012

Along with sustainable and rapid development of economy, the hospitality industry is improved significantly. Based on the pre-planning and design of a hotel, the general layout, functional division, environmental planning and landscape design of the hotel are discussed. Though the analysis, the green design of the hotel are researched. The results show that the pre-planning and design of the hotel is an important direction of hotel development. Only the pre-planning and design of the hotel are good enough, the individual and social path of sustainable development of the hotel can be reached and the hotel can remain its competitive at the fierce market competition, which provides a guide for continuous pre-planning and design of a hotel.


Zhang X.-M.,Jilin Institute of Architecture and Civil Engineering | Zhang Y.-R.,Jilin Institute of Architecture and Civil Engineering
Applied Mechanics and Materials | Year: 2013

In recent years, global environmental problems and energy crisis are highly regarded. The research and development of new energy sources and energy saving are two key ways to solve the potential global energy shortage. The solar energy is important for its cleanliness and unexhausting. The solar water heaters are widely used in domestic hot water supply. The former natural cycle system had a lower performance of heat collection, insulation and convenience as well as conflict with architecture. It is necessary to develop a new style solar water heater in north china. This paper presents an forced circulation solar hot water supply system with spiral copper coil as heat exchanger in heat storage tank and plate solar collectors. It has high collection efficiency and it is consistent with the architecture. The system is full of antifreeze to solve the freezing problem in north china. The experimental study was conducted for solar hot water supply system. The experimental results indicate that the forced circulation solar hot water supply system has superior performance of heat collection and heat transfer. The average heat output is respectively 2.82kWh/m2 in spring, 3.13 kWh/m2 in summer and 2.73 kWh/m2 in autumn. The hot water output is respectively75.3L/m2.d in spring, 81.2 L/m2.d in summer and 56.5 L/m2.d in autumn if the temperature difference is 28 °C. In addition, by use of the experimental measured data the long-term thermal performance can be forecast. © (2013) Trans Tech Publications, Switzerland.


Gao B.,Jilin Institute of Architecture and Civil Engineering
Procedia Engineering | Year: 2011

The engineering practice teaching related to civil engineering students professional technology and practical ability of the students, In relation to their future can adapt to the society have talent market demand and high ability important segment. According to the characteristics of students, combined with the registered engineer examination system, the practicality course teaching contents of research, optimize the practicality course reform teaching link, strengthening civil engineering student quality training and performance, and is the key. © 2011 Published by Elsevier Ltd.


Zhang S.,Jilin Institute of Architecture and Civil Engineering
Advanced Materials Research | Year: 2012

A simple model, without any free parameter, is introduced to predict the size-dependent diffusion coefficient of nanocrystalline materials in this contribution. It is found that as the size of the nanocrystals decreases, the diffusion activation energy of atoms decreases and the corresponding diffusion coefficient strongly increases due to the Arrhenius relationship between them, which leads to evident diffusion at the room temperature. The model prediction is in agreement with the experimental diffusion results of Cu and Ag diffusion in Cu nanocrystalline materials.


Zhang S.,Jilin Institute of Architecture and Civil Engineering
Advanced Materials Research | Year: 2012

The melting temperature-pressure phase diagram [T m(P)-P] for corundum (Al 2O 3) is predicted through the Clapeyron equation where the pressure-dependent volume difference is modeled by introducing the effect of surface stress induced pressure. Al 2O 3 has been employed to test the reliability of the model, because of its important role. Al 2O 3 has been extensively investigated because of its widely ranging industrial applications. This includes applications as a refractory material both of high hardness and stability up to high temperatures, as a support matrix in catalysis. © (2012) Trans Tech Publications, Switzerland.


Xu Q.,Jilin Institute of Architecture and Civil Engineering
Advanced Materials Research | Year: 2012

The problem what the sustainable design of the hotel concern is how to maximize meet the requirements of the management by the means of planning and architectural design for decades to come and how to cut down the cost of operation and maintenance. On the basis of the design idea of the ecological energy saving, key space comfort in modern hotel architecture, the key element of ecological design of green hotel is discussed. Based on the planning design of a star-rated hotel in Changchun, the strategy of sustainable development, such as site selection, water resources, natural climate environment, utilization of renewable energy, indoor environmental quality, green building materials are analyzed.


Li Y.,Jilin Institute of Architecture and Civil Engineering | Han C.,CAS Changchun Institute of Applied Chemistry
Industrial and Engineering Chemistry Research | Year: 2012

Isothermal and nonisothermal cold crystallization behaviors of asymmetric poly(l-lactide) (PLLA)/poly(d-lactide) (PDLA) blends at PDLA loadings of 0-20 wt % were investigated in this work. Formation of the stereocomplex in the blends was confirmed by differential scanning calorimetry and wide-angle X-ray diffraction. For both neat PLLA and its blends, the overall isothermal cold crystallization rates increase with increasing crystallization temperature; moreover, the overall isothermal cold crystallization rates of PLLA are faster in the blends than in neat PLLA, indicative of the nucleating agent effect of the stereocomplex formed in the blends. Crystallization mechanism and crystal structure of PLLA remain unchanged despite the PDLA loading. For the nonisothermal cold crystallization, the crystallization process of PLLA is accelerated by increasing both heating rate and the PDLA loading up to 10 wt %. The Ozawa equation failed to fit the crystallization process, while the Tobin equation could describe it well in the relative degree of crystallization range of 0-75%. © 2012 American Chemical Society.

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