MODELING THE LOT CARGOES TRANSPORTATION SYSTEM IN CITIES

The share of the transport component that is taken into account in the prices formation for final products reaches 50%, so the cost transport services has a great impact on the final goods price, and the need to carry out transportation in a tight time frame, take into account minimal costs require the emergence of new scientifically methods of their organization. The research purpose is to build the lot cargoes automobile transportations in cities system model. The research object is the lot cargoes automobile transportations in cities process. As the analysis result of lot cargoes automobile transportations rational technology formation in the cities, such basic problem at the transportation process organization is allocated - it is irrational transportation routes. It leads to a large overall truck mileage, as well as low transportation speed, which is unacceptable in the current competition. During the literature sources analysis, the most popular existing transportation routing methods were considered, by means of which in research it is planned to carry out transport routes building in cities and it was found out that the routes developed by means of these methods have average links. As the existing criteria analysis result of lot cargoes automobile transportations rational technology formation in the cities the transportations cost is chosen as a criterion. After analyzing the all modeling methods advantages and disadvantages, taking into account the scientific literature recommendations, it was decided to use mathematical modeling due to its results versatility and accuracy. After formalizing the research object, developed a model of "white box", in which for the selected input parameters (delivery points number, car load, the average consignment size delivered to one point) built the lot cargoes automobile transportations rational technology formation in the cities mathematical model, at which the transportation cost will be minimal.

Technological measures to enhance efficiency of mining ore from stopes applying self-propelled equipment

The work analyzes current technologies of ore mining applying self-propelled equipment in underground conditions; studies practices of using the equipment in general and for broken ore transportation only; considers performance of mining enterprises in similar mining-geological and miningtechnical conditions; analyzes and generalizes causes of high ore loss and dilution rates in underground mining in Kryvyi Rih iron ore basin, thus revealing a problem of providing high efficiency and increased ore extraction with minimal quality deterioration. Marketable ore production is affected by decreased quality and high broken ore losses. Incomplete balance ore extraction when breaking and drawing ore from the stope results in deterioration of mining indices. Ore dilution with waste rocks leads to decreased ore content in the mined mass as compared with that in the ore massif. The research enables development and substantiation of the rational technology of ore drawing and transportation as well as designing a new structure of the loading face to ensure increase of the drawn ore quality indices.

Rational reduction of work in progress when assembling parts of a product using the group interchangeability method

The article discusses the method for interchangeability method. To reduce the volume of work in progress, the design of a fixed combined compensator is developed, which provides stepwise regulation. The article reducing the work in progress by stepwise regulation in multilink dimension chains when assembled using the group proposes a rational technology for the use of combined compensator, taking into account the peculiarities of the group interchangeability method. In order to reduce the work in progress during assembly using the group interchangeability method, two ways of using the combined compensator have been developed: 1 - the inclusion of a compensator in each dimensional chain collected by the group interchangeability method; 2-application of the compensator only at the stage of formation of work in progress during group assembly by replacing one of the parts with it. The peculiarity of the methods is the use of the informational advantage of group assembly — information about the actual dimensions necessary for sorting parts into groups. This eliminates the step of measuring the closing link during assembly and simplifies the design of the compensator, reducing the number of control steps.

GROUND OF RATIONAL TECHNOLOGY OF UTILIZATION OF WARMTH OF THE SYSTEM OF CONDITIONING FOR THE HOT WATERSUPPLY

Rational technology of effective application of thermal accumulator in the system of conditioning andhot water-supply of building in a warm period of year is analytically analyzed and grounded. Analyzed thepossibility of applying such an unconventional method as daily accumulation of thermal energy of the building'sair-conditioning system during the warm period with its subsequent use in the hot water system. Two technologiesfor heat recovery of the air conditioning system for hot water supply of a building using a heat accumulator wereinvestigated: with a constant volume of heat accumulator and variable condensing temperature of the refrigerantof the air conditioning system depending on the outside air temperature and heat recovery technology with avariable volume of heat accumulator and constant temperature condensation temperature of the refrigerantsystem conditioning. The research results showed the most efficient technology for utilization of heat from an airconditioning system with a variable volume of a heat accumulator, which is 35% more cost effective than atechnology with a constant heat accumulator cost of reference fuel. The possibility of real application of thesetechnologies, both in individual houses and apartments, was also grounded. Using the developed automatedmethod, it was certain that application of thermal accumulator in the complex system of conditioning and hotwater-supply in a warm period would allow assured to provide by hot water of users due to the system ofconditioning and will economize from 74% to 82 % conditional fuel as compared to a chart with a caldron andconditioner without a thermal accumulator.