This article deals with measurement of the thermal gradient on material during abrasive water jet cutting. The temperature was measured by thermocamera before the technological process started, during the abrasive water jet cutting process technology, and just after the cutting process. We performed measurements on several types of materials. We calculated the approximate amount of energy during the abrasive water jet cutting process technology that changes into thermoenergy, which is the current water pressure drained in a catcher tank.
Workplace redesign is a part of the ergonomic rationalization. Article is focused on the classification of redesign workplaces and life-cycle redesign. The optimal sequence of design creation is described as well as the example of ergonomic CNC workplace rationalization. The second part of the article is focused on the simulation and verification the model of workplace using by software Witness.
Subjectively, to verify the human perception of the state of satisfaction with the environment it is necessary to use objective methods. One of these methods is the heat flux measuring method. This paper points out the risk factors that affect the heat transfer coefficient H through building structures that are necessary to determine the projected heat input of the building. At the operation stage, the aforementioned structures are affected by environmental factors (noise, artificial lighting, heat sources). This changes the suggested value Hc to the real value Hr, which is documented by the measurements. The rate of change of the H value is given by the correction “K”. According to the measurements the value obtained can be corrected from 0.08 to 0.25. The final values of the heat transfer coefficient were generalized in the equation and the value of the building energy category within the energy certification of buildings was determined. The result is a methodology for the optimal determination of H values for hazard prevention.
This paper presented the results of experiments to determine Ug values of heat transfer coefficient on glazed window in the apartment block during heating period. For assessing the values of heat transfer coefficient of the window glazing was used heat flow measurements. Measurements are performed with optimal conditions (without the internal effects of environment) and the other hand with real conditions, when factors such as noise or artificial light affect on the construction of the glazing. Differences Ug - values is demonstrated by comparing the partial results due to transformation of noise and luminous energy from an internal environment to the heat flow in window glazing.
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