Analysis on Economy and Energy -efficiency of the Measurable Heating System

This paper analyzes the energy-efficiency of the measurable heating system through the analysis of three main energy-efficient measures:room temperature control,system climate equalizing and variable-flux circulation,based on the data of local climate;it points out that the remarkable energy-efficiency of the measurable heating system is gained especially in cases of the use of residential mode for the residence and office mode for the public building.Then,according to the analysis of energy-efficiency and market price of equipment added for this heating measure,the economy of the measurable heating system is analyzed.The results indicate that heating companies have gained extraordinary profits from new heating measure,the benefit for the clients are fulfilled only by setting reasonable heating prices and the measurable heating should be in accord with the market rules.     

Study on Simulation Method of Heating and Air - conditioning Energy Consumption of Residential Buildings

The heating and air conditioning energy consumption of residential buildings is influenced by the behavior of indoor living personnel.On the basis of research and analysis,two kinds of calculation modes reflecting the behavior of indoor living personnel are estimated.Under two kinds of different calculation modes,by using the building thermal environment simulation Toolkit DeST to simulate the energy consumption calculation for certain residential building in Shanghai,and the simulation results are compared with the research results.The influence of calculation mode on heating and air conditioning energy consumption of residential buildings in Shanghai is analyzed in this paper.In order to obtain the right simulation calculation method correctly reflecting the energy consumption of residential buildings.This method can be used for analysis and evaluation of heating and air conditioning energy consumption of residential buildings in Shanghai,and it can serve as instruction for right energy design of residence building.     

Measure and Analysis on the Temperature Field of Sodium Silicate Bonded Sand Heating by Microwave Energy

The temperature field of sodium silicate bonded sand heating by microwave energy is measured and analyzed by the related characteristic quentities. The result shows that sodium silicate bonded sand heating by microwave energy has characters such as temperature rising speedy and heating occurring from inside to outside at the same time. The reasons of those characters are discussed by testing and analyzing. The viewpoint that the temperature rising of sodium silicate bonded sand heating by microwave energy is revocable by sodium silicate absorbing microwave energy is proposed. The results of this study are useful on rightly understanding the essentials of the heating by microwave energy for sodium silicate sand and rightly constituting heating technology.     

Application of Swimming Pool Heating with Solar Energy

Solar energy sourcei s regenerative source,reasonable use of it is an effective way to solve the problem of exiguousness of the traditional energy. But the usage of the solar energy is limited. To achieve the satisfactory effect, we must use a reasonable system style combined with the traditional energy. Through the application of swimming pool heating with solar energy. It is pointed out that more attention should be puid to reason dispose the collectors,store up heating tank,assistant thermal resource and dependable auto control. Solar energy can take place of the traditional energy, it is obviously that the solar energy can save the money and the energy and protect the environment.     

Study on Underground Hot Water Storage Tank Cooling of Solar Energy Heating System

In view of the different of the underground heat storage water tank of solar position arrangement, make use of the Fluent software program numerical simulation and calculation, it is concluded that under different conditions the heat storage water tank temperature field distribution of the soil around. At the same time, establishing physical model and mathematical model of underground heat storage water tank and combined with practical engineering, verify the underground storage tank for heat and energy storage, to obtain the relationship between the tank roof loss and total heat release. Calculation results show that under the same conditions, outdoor storage tank at the top of the heat dissipating capacity to reduce, so the method can be used to offset at the top of the energy required collector to reduce, so the method can be used to offset this part of the energy required collector area of the cut, improve thermal efficiency and reduce the user store hot water tank of the store.     

Capillary Floor Radiant Heating System of Rural Residential Building in Chongqing

The indoor environment in this zone, not officially assigned as a traditional heating zone, is cold and humid with poor thermal comfort in winter. Investments and surveys the status of heat consumers in rural residential buildings in Chongqing, intending     

Reducing the Heating and Cooling Energy Consumption of Buildings

Abstract:This research aims at proposing measures to enhance the energy efficiency of buildings in the city of Guiyang. A computer simulation study was conducted on the basis of a building model using the DeST software package. The indoor temperature and year round heating and cooling loads were simulated. From analysis of the simulation results and taking into account the climate of Guiyang, three measures for energy efficient buildings in Guiyang are proposed. 1) Heating is a greater priority than cooling in comfortable air conditioning system design; 2) Natural ventilation should be given priority in cooling design and adjustment during seasonal transition is important to reducing energy consumption in building cooling; 3) Insulating the building envelope and lowering the glazing ratio of walls are critical for reducing energy consumption in heating buildings. Our conclusions will be useful for guiding energy efficient building design not only in Guiyang but also in mild climatic areas of P. R. China.     

Analysis of a New Distributed-Pump Scheme Applied in District Heating Network

It is helpful for energy efftciency to use distributed pumps instead of valves to regulate hydraulic balance in a district heating system (DHS). A new scheme of distributed pump-system is presented based on performance comparison of hydraulic regime and power saving of single-heat-source dendritic pipeline networks with regulating valves and/or distributed pumps. Supposing that the new scheme was employed in multi-sources looped-pipe network, theoretical analysis and case study were carried out to evaluate off-design performances including hydraulic self-regulation, supply water temperature stability and power-saving potential. The results indicated that the proposed scheme would contribute to minimizing power consumption, retarding water temperature change, and would be convenient to adjust the quality and quantity independently in the looped-pipe heat supply networks.     

Research on Energy Consumption and Energy Efficiency Design for Department Stores in Chongqing

In order to research energy efficiency design of public buildings, the large and medium scale of typical department stores in Chongqing are chosen as objects and twelve stores are investigated about their operational energy. Based on the investigation results, the composition and features of operational energy are analyzed ; it is shown that the short of effective measures in respect of architectural design leads to the high power consumption in department stores. According to the local climate and environment characteristics, this paper puts forward concept of holistic energy efficiency and offers series of design strategies which lead to energy conservation in stores,such asefficiency.regardingclimate as resources and applying appropriate technology to attain energy efficiency.     

Design of Cooling/Heating Floor AC Systems in Residential Buildings

This paper puts forward a new way in air_conditioning,which combines the fresh_air supply unit and such floor radiation system for the dehumidication and cooling in summer or heating in winter. By analyzing its advantages and limitations, it is found that this so called Cooling/Heating Floor AC System can improve the IAQ of residential building while keep high efficiency quality. It is also recommended that an methodology for the HVAC system designing,which will ensure the reduction of energy cost of users.     

Adaptability Analysis of Passive Building Energy Efficiency Technology in Selected Climatic Regions

Passive building energy efficiency refers to utilizing ecological building design principles with natural climate resources to realize building energy efficiency, which is greener, more conducive to the sustainable development of the human living environment, and will actively advocate building energy efficiency. The adaptability of six passive building energy efficiency technologies including passive solar heating, natural ventilation, thermal storage wall, induced and night ventilation, direct evaporative cooling and indirect evaporative cooling in typical cities in selected climatic regions would be analysed. In addition, the applicability of passive building energy efficiency technologies in selected climatic regions would be compared.     

Experimental Analysis of Solar Energy Combined with Phase change Energy Storage Ventilation System

Solar Ventilation System is unstable and uncontrollable, so a new technology is proposed to get a system that takes solar energy as heat source and applies phase change material in daytime to store energy which is used to keep ventilation in nighttime by thermal pressure. This new system is helpful to get the ideal ventilation effect for buildings. Through the experiments on ventilation with PCM of 63℃ and 44℃, ventilation rate change curve is obtained to analyse ventilation system efficiency. The results indicate that using the PCM of 63℃ and 44℃, the total ventilation of the solar ventilation system in 10 hours are respectively 8066 m3 and 6154 m3 at night, and the average ventilation per hour and area are 538 m3/h and 41 m3/h. Based on the experiment, when PCM is palmitic acid, the ventilation effect is superior than that of lauric acid. To sum up, the system of conventional solar rooftop ventilation system combined with phase change materials can intensify the nature ventilation effectively in nighttime for buildings, improve indoor thermal environment and reduce the energy consumption in air conditioning building.     

Computer Aided Analysis Tool for Building Energy Efficiency in Conceptual Design Stage

Conceptual design is one of the most important stages in building design, and energy efficiency analysis is one of the key issues in building conceptual design stage. The existing energy efficiency analysis methods and tools require inputing large number of parameters. However, the detail information of most parameters is not identified at the stage of conceptual design. And the current prevailing energy consumption simulation methods and tools are not appropriate at the stage of conceptual design. The proposed method can be used to compare the energy efficiency of multi strategies at the conceptual design phase. Minimum data were required to be input for achieving the optimal building design scheme. The method can provide a solution to the gap between the rapid building design cycle and the sustainable development demand in China.     

Analysis of Building Energy Efficiency Contribution Ratio of Chongqing in "11th Five-Year Plan"

How much contribution ratio of building energy efficiency for Chongqing in "11th Five-Year Plan" to the target of reducing 20% energy consumption per 10,000RMB GDP was the important problem to promoting building energy efficiency work.It has important significance to make target and measure of building energy efficiency.In this paper,the developing situation of building energy consumption,building energy consumption and energy-saving index for Chongqing in "11th Five-Year Plan" were analyzed and calculated through the statistics data published by statutory bodies and pre-setting work scenarios of energy efficiency for Chongqing in "11th Five-Year Plan".Calculating result confirmed that energy efficiency for Chongqing in "11th Five-Year Plan" payed 15.5% contribution ratio to the target of 20% less energy consumption per 10,000RMB GDP till 2010 compared to 2005.     

An Energy Conservation Correction Method for Energy Efficiency Retrofit of Public Buildings

There exists imperfections of the methods for energy conservation verification of the energy efficiency retrofit projects. A new energy conservation verification method was developed by creating energy conversion correction model and four correction coefficients and three calculation formulas were involved, The four correction coefficients were outdoor weather correction coefficient, indoor environmental correction coefficient, internal load correction coefficient and performance period correction coefficient. The three calculation formulas were heating energy conversion calculation, air-conditioning energy conversion calculation and total energy conversion calculation. The energy conversion correction model was adopted to analysis the energy conservation of an office building located in Tianjin to demonstrate the reliability of the correction model and the feasibility of the verification method, and the corrected energy conversion based on consistent conditions before and after retrofit was obtained. 10.23% difference between the corrected energy conversion and the direct energy conversion exists indicating that the correction energy conversion is necessary. The energy conservation difference of 3.03% the calculation result of energy simulation software verified the accuracy of the new verification method.     

中国农业生产用能区域差异的时空分析

为了从时空结合角度全面反映中国农业生产用能的空间演化特征及其形成机理,笔者根据各省单位耕地面积农业生产能源消费,利用全局空间自相关指数、局部空间自相关指数,分析了中国农业生产能源消费的空间分布格局,建立了空间回归模型以分析其影响因素。研究结果表明,中国农业生产能源消费水平在不断提高,但省际之间的绝对差异和相对差异在不断扩大;农业生产用能水平存在空间正相关,体现为能源消费高值区集聚和低值区的集聚;冷点区主要集中在中西部的广大地区,热点区主要集中在东南沿海尤其是长三角地区,温点区则集中在东中西的交界地带;农业从业人数、农业机械总动力、农业总产值和农业固定资产投资,是引起农业生产能源消费空间分异的主要原因,但各因素的影响程度不同。此外,空间自相关性也是影响农业生产用能空间分异的重要因子。     

Simulation Analysis and Calculation of Energy Consumption in Green Building Design:A Case Study in Chongqing

It is well known that green energy-saving building should be popularized with great effort. But when it comes to practice, a key stage of building design is how to choose energy-saving technology, products and measures for raising energy-saving levels according to a building's own features. In order to solve the problem, we consider simulate energy-consumption analysis as a tool to synthesize the effect of indicators, such as wall insulation, sunshade, lighting, ventilation etc. Then we compare the result with the national standard to make sure that the energy-saving technology, products and measures really work. As a result, the energy conservation measure can be determined and prominent energy-saving effect can be achieved.     

Thermal Performance Optimization of Solar Heating Building Envelope in Tibet of China

Solar heating system is a promising sustainable energy source for buildings. Simulation models using EnergyPlus and TRNSYS were used to optimize the solar heating building enclose thermal insulation. The sensitive analysis of active solar heating system design parameters and energy consumption was conducted to study the influence of building envelope thermal performance on the active solar heating system. The two object functions, investing cost and lift time cost, were used to optimize the building envelope insulation. The results show that not only the energy consumption can be reduced by increasing the building envelope thermal performance, but also can minimize the investing cost.