Predictive Model of Performance of Metal-packed Evaporative Air Conditioning System

Based on characters of Artificial Neural Network(ANN) such as non-liner mapping,self-learning,the ANN model was set up to predict the relationship between effective factors and performance of metal-packed evaporative air conditioning system.In order to reflect the performance of the predictive model,experimental data were used to test and verify the model.The outcome of the ANN model is in good agreement with experimental data and relative difference is within 6 percent.So it is feasible to predict the performance of metal-packed evaporative air conditioning system.     

Model Experiment and Primary Research of Laminated Air Conditioning in the Powerhouse of Three-Gorges Hydropower Station in Summer

In this paper, the model experiment of laminated air conditioning in the powerhouse of Three-Gorges Hydropower Station was introduced. To assure the effect of air conditioning, the influence of different roof temperature, air supply velocity and Ar number on air distribution was analyzed and studied. Some conclusions have been drawn.     

Design and Analysis of the Air Flow and Distribution of Laminated Air Conditioning in Summer in the Powerhouse of Sanxia Hydropower Station

Around the design of air flow and distribution about the laminated air conditioning in summer in the powerhouse of Sanxia hydropower station, the system division, air flow pattern, air supply state and volume etc have been analyzed separately. Based on the existing domestic achievements, the relative calculation model has been established and the application method has been explored. From this the program named as AFDC/LACS has been compiled with language FORTRAN77 and the calculation on the airflow and distribution of the place mentioned above has been done with several design conditions. Thus some batches of the technical parameters have been provided to plan the test conditions in the heat simulated test..     

Exploring Some Problems in the Design of Air Conditioning of Zunyi TV Building

In this paper the general engineering situation of Zunyi TV Building was presented. Then, the determination of indoor design parameters, selection of cooling and heating loads of air conditioning and cold and heat sources units, design of air conditioning systems, control of air speeds and forms of air distribution, control of device noises of air conditioning and decrease of vibrations were introduced.     

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.     

Load Prediction with Neural Network Method and Operation Optimization of Ice Storage Air Conditioning System

This paper presents some common control strategy of ice storage air conditioning system. It is suggested that the optimization on ice storage air conditioning system should be based on accurate load prediction and the artificial neural network (ANN) modeling for load prediction was presented.     

对提高我国支农资金运行绩效的探讨

针对中国支农资金运行中存在的问题,提出合理确定财政支农资金投向,优化结构布局,以县为主,加大各项支农资金的整合力度,强化支农资金的过程监管与责任追究制度等措施。     

Operational Parameters of Hybrid Radiant Cooling Floor and Displacement Ventilation Air Conditioning System

The simulation model of hybrid radiant cooling floor and displacement ventilation air conditioning system was built and analyzed by software EnergyPlus. By comparing the simulation results and experimental data, it is shown that the simulated indoor air temperature and cooling capacity provided by radiant floor was ±7% deviated from the experimental data. Based on the model, with the change of supply air parameters or supply water parameters, the cooling capacity provided by radiant floor and displacement ventilation, surface temperature of radiant floor, indoor air average temperature, AUST temperature were obtained. Combined with the indoor thermal comfort model, when indoor thermal comfort index PMV varied between -0.5 and 0.5, the recommended supply air and supply water parameters were obtained to provide reference for engineering design and application.     

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.     

Design and Construction of an Air Conditioning System Employing a Ground Source Heat Pump Combined with a Radiant Floor

The air conditioning system using a ground source heat pump(GSHP) combined with a radiant floor integrates the advantages of both types,giving such a system large potential for popularization.After experimenting with one house's hybrid system,the design processes and construction methods for such a system can be summarized.In the experiment,different terminal devices were used to adopt varying winter and summer climatic conditions.It is suggested that the constructors should make good use of resources and waste water during the construction phase.The experimental results show that this hybrid system runs steadily and it supports a better temperature field to meet the requirement for the human comfort.Finally,a hybrid system managment strategy is suggested.     

Hydraulic Characteristics and Energy Efficiency of An Air Conditioning Chilled Water System With Primary Pumps

The hydraulic characteristics and energy-saving performance of a chilled water system with primary pumps is analyzed. It is proved that the hydraulic characteristics of the system with terminal of the air conditioners tends to large temperature differences and small flow rate, while the hydraulic characteristics of the system with terminal of the combination of fan coil units and air conditioners tends to large flow rate and small temperature differences. When the cooling load is reduced, in order to ensure the energy-saving performance of the primary pump system, the fixed chilled water flow is required. If the fixed water flow system is adopted to regulate the outlet water temperature,the bypass water flow rate should be decreased as much as possible. If the pump frequency regulation is selected, and the proportion of energy consumption of the pump accounts for 30% of the total at the same time, the more the system’s hydraulic characteristics approaches that of air conditioners, the higher the energy-saving rate will be, which could be markedly greater than 10%. By regulating the water temperature and cold water quantity, over flow of chilled water still exists. Therefore, bypass water flow should be provided. And the bypass pipe diameter is determined respectively by the water flows which are 1.2 ~ 1.8 or 0.2 ~ 1.0 times larger than that of a single chiller when the pump works in frequency conversion and constant frequency.     

Analysis on Influencing Factors of Indoor Air Quality and Measures of Improvement

Nowadays,IAQ(Indoor Air Quality) becomes a topic of general interest.This paper discusses the definition and influencing factors of IAQ and puts forward some measures for improving indoor air quality.     

Influence of Shock Loading on the Operating Performance of an Anaerobic Baffled Reactor

Wastewater from a slaughtering house was treated by an anaerobic baffle reactor (ABR). The effects of variable loads on the operating performance of the ABR were studied. The results show that the ABR was very stable with respect to shock loading due to its special structure. The change in COD removal efficiency was less than 5% when the influent COD concentration was kept between 2 500~3 000 mg/L and the HRT decreased from 27.5h to15h. When HRT was kept for 20h and the influent COD concentration increased from 2 500 mg/L to 4 800 mg/L, COD removal efficiency only decreased by 69% the second day after the load change.     

Study on Design of Bio-clean Operating Room

The design of Bio-clean operating room in modern hospital is quite different from that of traditional operating room. This paper discusses three aspects of Bio-clean operating room design: air clean standard and air purification, interior equipment system and interior finish. It is hoped that this discussion will conduce to later designs.     

A Sort of Design Model of Embedded Multitasking Real-time Operating System Applied in Chip

In terms of the design of Traditional Embedded Real-time Operating System(ERTOS),the authors make use of the integration and big Kernel structure,which has the limitation in some aspects,such as the retractable,portable,supportable for hardware platform with new structure and open for interface standard and so on.Based on the analysis of RTOS,a sort of design model of embedded multitasking real-time operating system is proposed.First,the hardware(abstract) layer and operating system kernel are studied.Then,the highly scalable,real-time,transplantable and application programming preface design of ERTOS are presented.This design model takes use of the hardware Bard Support Package(BSP) to support the transplanting in sorts of OEM board or hardware system board,therefore solves the questions in traditional system,and last meets the current need for ERTOS.     

Experimental Study on Enhancing Dynamic Performance of NGV Engine by Using Oxygen-rich Air

NGV engine adopts the fuel supply method of premixing natural gas and air in the premixing chamber out of cylinder, which results in the engine dynamic performances decline. It is an obstacle to popularizing and applying NGV. Using air rich in oxygen to support combustion can decrease ignition point of the fuel, enhance combustion efficiency and make much more heat available. The dynamic perfonnances and fuel consumption rate of a NGV engine with different oxygen concentration are researched in detail. The results show that the increase of oxygen concentration has remarkable influence on the dynamic performances of NGV engine. Power and Torque performances increase and fuel consumption rate decreases when oxygen concentration of premixed gas increases. The results of theory analysis and experiment research indicate that combustion-supporting using oxygen-rich air can enhance the dynamic performances of NGV engine.     

Advance of Management Performance Evaluation in Petrochemical Engineering Construction Project

Toward the characteristics of petrochemical engineering construction project and the need of project management performance evaluation, this paper analyzed the status of project management performance evaluation study and the status of project management performance evaluation study in petrochemical engineering construction project. This paper suggested the direction of project management performance evaluation study in petrochemical engineering construction project, which is to establish the performance evaluation index system of petrochemical engineering construction project management and performance evaluation method, to establish process performance evaluation system of petrochemical engineering construction project management, to develop performance evaluation software of petrochemical engineering construction project management.     

Research on Calculation of the Automobile Air Conditioner's Cooling Load

In this paper a nonsteady heat flux equation for car body is established and the formulationof transmission function coeficient of the cooling load is derived. The composition of the automobile airconditioner's cooling load has been analysed and a computer program for calculating the cooling loadhas been compiled, It has proved to be exact from the example, So these results are of practical value.     

Experimental and Theoretical Research of Operating Environment and Energy Efficiency Evaluation in Eity Tunnel

In order to make a reasonable evaluation on operating environment and energy efficiency in city tunnel, the distribution of CO concentration in different types of city tunnels has been studied. Three typical city tunnels have been researched, the main parameters of their operating environment have been tested, the electricity consumption has been stated. Operating environment and energy efficiency of different tunnels have been analyzed. Principal component analysis has been used to establish a theoretical model of evaluation of operating environment and energy efficiency, a comprehensive assessment has been conducted. Relatively optimal operating mode of the tunnel has been gated. This conclusion has a certain reference value for the construction of city tunnel.