Abstract

 
 
 The article presents the analysis of the implementation of selected elements of car transport in the aspect of ecology. The basic issue that affects the protection of the environment (ecology) is the value of energy intensity in the manufacture of products. The elements made in the production process of plastic mouldings were compared. The amount of energy in kJ needed to produce 1 kg of a given product was estimated. Next, the dependencies between the value of computational energy intensity and the emission of gases affecting the environment of CO2, SO2, NOx were presented. As a conversion factor according to GUS data, it was assumed that 1kWh production in Poland causes emission of 800 g CO2, 7 g SO2 i 3 g NOx.
 
 
Highlights
Energy intensity in the production of a specific product is the amount of energy consumed in the production process [1÷3]
The total energy consumption of the production process is influenced, among others, by the tools that wear out during the manufacturing, processes related to the regeneration of used materials, or costs related to the planning of production processes [4÷8]
The total technological energy intensity ETcał is: ETcał=Etw+Emf+Ef+Etukł =5500+14,8+100,8+3560 = 9175,6 kJ/1 kg of product, where: Etw= 5500[kJ/kg] of plastic material based on CSO data; Emf – energy consumption needed to produce material for the injection mold; Ef – energy consumption of the injection mold, 100,04 kJ/kg for 100000 injections; Etukł – energy consumption in the production process per 1kg of product kJ/kg
Summary
To assess energy intensity the following components were selected: 1. Can, which is the seatbelt's casing (Fig. 1); 2. Frame, which is a casing used for the mounting of control systems (Fig. 3); Welding Technology Review – www.pspaw.pl Vol 91(3) 2019. The can and headrest are made of polypropylene, whereas the frame is made of the highest strength plastic, which is the PC polycarbonate. The total technological energy intensity ETcał is: ETcał=Etw+Emf+Ef+Etukł =5500+14,8+100,8+3560 = 9175,6 kJ/1 kg of product, where: Etw= 5500[kJ/kg] of plastic material based on CSO data; Emf – energy consumption needed to produce material for the injection mold; Ef – energy consumption of the injection mold, 100,04 kJ/kg for 100000 injections; Etukł – energy consumption in the production process per 1kg of product kJ/kg.
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