Prediction of Cutting Temperatures in Milling Stainless Steels Using Sharp Worn Tools

The main purpose of this paper is to predict the tip's surface temperature of milling stainless steel using chamfered main cutting sharp worn tools. The cutting temperature model incorporating tool wear factor and using the variations of shear and friction plane areas occurring in tool worn situations are presented in this paper. The heat generate on elementary cutting tools are calculated by using the frictional cutting forces. Comparing the experimental forces measured by the dynamometer, that is good agreement. The carbide tip’s temperature calculates by loading the friction forces and tip’s parameters and the temperature distribution are solved by finite element analysis method.

Study of Solar Energy Floor Heating System in Cold Climate Zone

Urumqi locates in Xinjiang province, which belongs to cold climate zone in China, the local heating period during the winter up to 6 months. The local solar energy is abundant; up to 130-140 Kcal/cm2·Y that can provides advantage condition for utilization of solar energy. Floor radiant heating system requires lower supply temperature compared with the traditional heating system, which provides an advantage condition for using solar energy as heat source since it is already widely used in Urumqi. Based on these, the study established a solar energy floor heating system in XinJiang University. The system’s components, operating principle and indoor air temperature profile had been introduced in this paper. Through the experimental study the research results shows that 40% time of winter period in cold climate zone, the solar energy floor system can working well without any auxiliary heat source, the heat generate from solar collect system can satisfied the indoor heating requirement. The application of this system can make energy saving and environmental protection become true.

The Feasibility Study on Cogeneration Using Chemical Waste Gas

It is analyzed in the paper that the production and composition of waste gas, such blowing gas, associated in the chemical production of the chemical enterprise in Shandong. The calorific value of the waste gas is calculated. Thermoelectricity cogeneration is realizable with using the waste gas as fuel. The scale remaining heat generate electricity is determined. The types of main equipment are discussed. The technical process of cogeneration using chemical waste gas is analyzed. economic benefit is studied in detail.

Sizing Incineration for Base-Load Energy

Many state and country codes require that Volatile Organic Compounds (VOC) are either captured or destroyed before they are emitted to the atmosphere. This measure requires designing and operating refrigeration systems that would evaporate, condense and separate the VOC from air stream, or more commonly, install afterburners to combust the VOCs. Both condensation and combustion related abatement technologies involve large capital and maintenance costs. In the case of combusting the VOC, fuel is usually added to the air/VOC mixture for proper air/fuel ratio and effective combustion. The resulting high temperature gas free from VOC is often emitted to the ambient with little or no value captured from the energy intensive process. Regulations limiting the emission of VOCs continue to grow. Paint and coating lines and manufacturing processes that involve emission of chemical vapors such as carpet manufacturing, produce large amounts of VOC that needs to be oxidized. Other incinerators that do not necessarily involve VOCs, such as kiln systems also produce large energy waste. Thermodynamically, the VOC destruction combustion process is simply a total waste of energy unless it allows some waste recovery. Afterburners are typically designed for environmental reasons, ignoring the energy cost, which is accepted as an inevitable penalty. This paper discusses the feasibility of selecting incinerators as a Gas Turbine Oxidizer (GTO) sized for the base-energy load. So sized GTO could produce process heat, generate electric power, shave energy peaks, and reduce air pollution without compromising the primary intent of effectively destroying VOCs.