Study on Calculation Method of Energy Savings for Public Buildings

According to the principles of various methods and energy consumption characteristics in Chongqing, new method of energy saving calculation is proposed for public buildings. It's shown that building envelope, facilities and energy management play the key role in energy saving reconstruction. Considering the difficulty of measuring adjustment quantity, the calculation should be under some certain prerequisites (design conditions), also the prevailing industry standards can be fully utilized. During the energy saving calculation, another key point is how to reflect the contribution rate of the single technologies for energy saving reconstruction.     

Analysis and Applicati on High- Efficacy Saving Energy Technique of Central Air - Conditioning System

Aimins at the state that present central air- conditioning systems performance in high ineffective energy consumption, this paper studies the reasons of ineffective energy consumption and the key technique to solove the problem. A set of energe saving device for central air - conditioning systems is developed. A system dynamical mathematical model is established in theory, and an optimal performance pattern is fired. The central air - conditioning system can work in the optimal pattern with effective comfortability and saving energy by using. The device may save power rate to 22.6% by survey and may have broad market prospect in the southern area.     

Study on Application of Interrelated Controlling Method for Thermal Environment and Energy Saving in Buildings--Application in Determining the Control Indexes for Heat Insulation and Energy Saving of Enclosure in Bu ildings

In this paper according to the relationships between indoor-outdoor climate parameters, indoor thermal environment parameter and heat insulation parameters of enclosure, the control condition of indoor thermal environment and the control parameters of heat insulation-energy saving are advanced. Prescribing a quality limit for the parameters, the control indexes for the heat insulation energy saving of the enclosure are given.     

隧道式干燥机节能研究现状及展望

介绍隧道式干燥机的节能研究现状。研究将各种节能措施与隧道式干燥机有机结合起来,对不同物料的最佳干燥工艺,以达到最大程度节能降耗的目的。     

冷藏库的节能途径

介绍了冷库的现实作用和功能特点,论述了冷库的节能方法,对我国冷库的设计与运行管理具有重要的意义。     

Energy Saving and Optimization of the Municipal Water-supply Systems

This paper describes the familiar ways for the energy saving of the municipal water-supply systems and the basic methodologies for the optimal pump operations. A recommendation of the most-used nonlinear programming and the lately developed genetic algorithm of the water distribution systems is also provided. Advantages and disadvantages of each approach are presented,along with the comment of the corresponding applications.At the last part of this paper, the author puts forward his suggestions, at the basis of the summary and conclusion of energy saving and optimization of the municipal water-supply systems.Through this paper, the author hopes to review the state of existing ways and methodologies of the water-supply systems,and to recognize the future work that for us to do.     

Green Thought on the Energy Saving of Air Conditioning

This paper points out the problems in air conditioning and the urgent need in energy saving. By observations and analyses, it shows that the idea of making use of natural resources to improve the indoor air may date back to ancient times. This paper also examines the feasibility of taking advantage of dry or wet bulb temperature, solar energy, underground rock etc. to regulate the room temperature. Finally, it concludes that the above mentioned old idea has such characteristics as energy saving, low cost and less pollution. Therefore, it is a good green plan in energy saving air conditioning.     

Optimum Planting System for Energy Saving and Healthy Demanded

It is proved that planting is effective to improve environment both indoor and outdoor resulted from the functions of plants to clean air and save energy. So the contradiction between saving energy and comfort,healthy demanded by people can be solved by planting. The planting have being emphasized and expanded during recent years,but in the planting plan,just the function of beautifying the environment is concerned and the function of ecological and saving energy are neglected. The analysis on the ooptimum system of planting is to make the planting system as an organic composition in the effectiveness structure and space layout of the city. Based on the study on equivalent relation of different effects on environment, the optimum system of planting structure will be determined in order to achieve the integrated effects of planting on environment.     

大宗蔬菜产地节能贮藏库设计及性能测试

针对大宗农产品多次丰产滞销、采后损失大等产业难题,结合我国当前农业生产和农村经济体制,通过设计、性能测试、贮藏试验,研制出一种大宗蔬菜产地节能贮藏库,其特征为:库房可周年使用,造价低于标准冷库50%,能耗减少90%;库体围护结构总热阻R≥1.83 m2·h·℃·kJ-1,导热系数K≤0.55 k J·m-2·h-1·℃-1,库温几乎不受外界温度影响;设置轴流风机强制通风,库内不同位置温差△T≤2℃;采用无冷桥设计,减少耗冷结霜量;采用DL-4.3/20型制冷设备,控温范围-5～15℃,精度±0.5℃;采用PLC温度控制系统,贮藏温度可均匀、稳定地控制在(0±0.1)℃。马铃薯贮藏180 d,VC含量、腐烂发芽率、还原糖含量、淀粉含量、呼吸强度等综合指标均优于对照。大宗蔬菜产地节能贮藏库是集自然冷源降温、机械制冷、保温控温等功能于一体的节能贮藏设施,适合大宗农产品的长期贮藏。     

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.     

Study on the Energy Consumption of Atrium Buildings

This paper reviews the evolvement of the atrium. In this paper the function of atria in buildings and the thermal performance and climatic factors of atria were described. The factors influencing the energy consumption of atrium buildings were analyzed and some measures for energy saving were presented. By using a computer simulation, the impact of the atrium's physical parameters including atrium proportion, top-glazing area and atrium wall mass on its energy costs was studied.     

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.     

Energy Saving Principle and Design Experience of a New Type Curtain Wall

The energy consumption and sight pollution of glazing curtain wall are two problems to be urgently managed. Intelligent curtain wall is a new type one of energy conservation and environment protection, in which the thermal channel to save building energy consumption and automatic sunshade to adjust sunlight are adopted. Four engineering examples of oversea intelligent curtain wall are briefed. The construction and energy saving principle of ventilative curtain wall as the core technique of intelligent curtain wall are presented. The earliest ventilative curtain wall in China Mainland, and its test results of heat preservation in winter are stressed. The design experience of how to choose three key parameters: the width of thermal channel, the layout of inlet and outlet and the type of glass is discussed.     

冷库设计及运行过程中的节能

就冷库设计及制冷设备运行过程中的主要节能途径进行了分析,在阐述冷库围护结构节能设计、制冷设备节能的基础上,概述了冷库运行管理中的主要节能降耗方式.     

Effects of Operation Mode of Air Conditioning on Energy Consumption of Heating and Air Conditioning in Residential Buildings

By using the building thermal environment simulation Toolkit DeST to simulation calculation of a residential building in Shanghai,the quantitative relationship between the factors of operation mode of air conditioning affecting the energy consumption of heating and air conditioning in residential buildings has been obtained in this paper,moreover,it has come to a conclusion that the tolerable temperature is superior to control temperature of air conditioning in respect of sensitivity and the living mode of indoor personnel has certain effect on the cold energy consumption.     

The Energy Saving Design of Domestic Water Supply for a Residential Quarter of High-rise Buildings

The schemes of domestic water supply for a residential quarter of high-rise building are introduced.The energy consumptions of water supply schemes selected are compared and analyzed.The energy saving of the water supply schemes with water tank and variable velocity variable frequency pump are obtained.And demonstrated the domestic water supply system of combination the roof water tank and variable velocity variable frequency pump is good at energy saving.Furthermore,by the comparison of the investment and cost of these schemes in their lives,the best choice of domestic water supply system is gained.     

Analyses of Current Situation of Energy Management in LargePublic Buildings of Chongqing

This study doing statistics of energy consumption and energy auditing of state organs buildings and large public building in Chongqing, then according to the buildings use function classification, analysis problems in energy management and give advices, provides theoretical foundation for establishing state organs buildings and large public building energy-saving system and improving level of building energy-saving management.     

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.     

Application and Simulation of HVAC Energy saving ControlSystem by Least Enthalpy Difference

In the process of air conditioning, not only the thermal comfort but also energy saving should be considered. A method, which combines a least enthalpy difference（LED） and mixing air ratio based on the theory of enthalpy, can help to approach to comfortable zone for the air before coming into air handling unit (AHU). Then several mathematic equations of mixing process were derived based on laws of conservation of mass and energy. Eventually, the models of HVAC were established under SIMULINK environment. And the control strategies are validated in the aspects of improving comfortable effect and saving energy. It is found that LED based PID controller can achieve the requirements of better thermal comfort and energy efficiency.