Papers by Keyword: Saving Energy

Abstract: Courtyard sunspace passive solar house is designed according to architecture structure characteristics of rural courtyard, which is a composite of direct absorption, collected wall and attached greenhouse solar house. Architectural optimization design is carried out in order to improve energy saving effect of courtyard sunspace passive solar house, and evaluation standard of thermal performance test and energy consumption of building test is determined to analyze indoor thermal environment of courtyard sunspace passive solar house. It will provide theoretical foundation to construct courtyard sunspace passive solar house in rural area.

Abstract: It is one of the ways that realize the energy conservation of the building to use effectively extracting air heat recovery devices. In this paper, influence factors and heat recovery efficiency in air-conditioning system were analyzed, and design parameters of heat recovery devices were discussed with the view of saving energy.

Abstract: This paper provides a method of supply constant pressure air for air conditioning system. It analysis the energy consumption betwwen the damper adjuste air flow with variable frequency speed regulation adjuste air flow. The paper Introduce the Energy conservation principle of the frequency control blower. The supplying air Pipeline subject to a uniform force, the equipments mechanical properties was improved.The results show that Uses the frequency conversion velocity modulation to carry on supply constant pressure air, obviously reduces the energy consumption.The electrical motor starting characteristic is improved, realizes the electrical motor soft start.

Abstract: This document introduce commonly used to control the centrifugal water pump flow, The valve export opens degree, control pump turning speed , working principle and characteristics of the Two kinds methods, the structure of the three-phase Frequency Conversion, the Frequency Conversion external connection, point out the effect that frequency conversion timing to Adjust the flow of the pump.

Abstract: This paper reports a combined space cooling, space heating, water heating and food refrigeration system (named CO2 combined system) in supermarket. This system using CO2 as the working fluid consists of a two-stage CO2 transcritical cycle used for food refrigeration, a single-stage CO2 transcritical cycle for space cooling in summer and space heating in winter. The waste heat emitted from the CO2 gas cooling in food refrigeration cycle and space cooling and space heating cycles is recovered by heat recover exchanger and is used to provide hot water for space heating and for general usage, such as the catering, the washing and the toilet facilities in the supermarket. So this CO2 combined system improves the coefficient of performance, decreases the energy consumption as well as reduces the heat pollution. Moreover, this CO2 combined system is compared with typical conventional supermarket technology, the results show that the energy consumption of CO2 combined system is reduced largely and energy efficiency is increased obviously. It can be concluded that the CO2 combined system has a good future for protecting environment and saving energy.

Abstract: Abstract.Blast Furnace Gas (BFG) system of an iron and steel works was considered. The relationship of gas amount and factors about BFG generation and consumption was analyzed by grey correlationand the BP neural network prediction model of blast furnace gaswas established based on artificial neural network for forecasting thesupply and demandof BFGinthe iron and steel-making processes.The scientific forecasting of BFG generation and consumption in each process was discussed undernormal production and accidental maintenance condition. The results show that established forecasting model is high precision, small errors, and can solve effectively actual production of BFG prediction problem and decreasing BFG flare, providing theoretical basis for establishing reasonable plans in the iron and steel works.

Abstract: Focusing on the current urban environmental sanitation facilities, this paper analyzes the current status of environmental sanitation facilities. Combining with various objects and life patterns in daily life, it discusses about the wide application of landscape environmental sanitation facilities in real life and particularly studies the landscape property of garbage containers. The advanced technologies are employed in the garbage disposal containers to design the environment-friendly, green and energy-saving new-type landscape environmental sanitation facilities. Moreover, it points out the significance of creating new technology and new concept in the urban landscape facilities, and adopts the innovative idea and new concept to realize the harmonious and wonderful human settlement.

Abstract: Energy is an important material foundation for developing the national economy and improving human living standards. We discussed the energy-saving principle of urban water supply system variable frequency pumping by analyzing the urban water supply and water pumping station curves, further studied the best speed and flow adjustment range of the Urban Water Supply Systems Variable Speed Pump, from both economic and efficient operation of pumps taken into account to determine the best number of the speed pump sets, which can be referenced for the design of urban water supply system variable frequency speed pump station.

Abstract: Outdoor air load plays a significant role in the air-condition system. Reducing the quantity of fresh air can be used to achieve the goal of energy saving as well as getting a comfortable environment indoor. The concentration of CO₂ is used as the indicator of measuring the quality of air indoor and it becomes a new method of controlling fresh nowadays. The conference room is taken as an example, and is commutated with ACH method, Minimum air method and CO₂ controlling fresh air method. The conclusions are as follows: If it is in the same situation,1. When there are less than 60 people, with the ACH method it costs the most fresh. That is, its energy consumption is the largest. 2. When there are 60~76 people, the CO₂ controlling fresh air method needs the least fresh air. That is, it costs the minimum energy. The ACH method and the Minimum air method are all designed in accordance with the maximum load. So with these methods it can lead to a great waste of energy. 3. When there are more than 76 people, the former two methods can’t meet the health requirements. In the end the strategy of CO₂ controlling fresh air method is given.

Abstract: This paper mainly introduces the energy-saving control strategy for coal-fired boiler heating system. The controlled objects of coal-fired boiler heating system includes the blowers of the boiler, the induced draft fan of the boiler, the chain for coal-carrying, the primary side water circulation and the secondary side water circulation. All the controlled objects are droved by electrical motors. By the optimal frequency conversion technical, more energy and coal can be saved.