Control method PLUM HIGH OIL from railway tanks

摘要

method u0443u043fu0440u0430u0432u043bu0435u043du0438u00a0 process discharge oil from u0432u044bu0441u043eu043au043eu0432u00a0u0437u043au0438u0445 equipped with a device of a rail tank wagons, including warm-up u0442u0435u043fu043bu043eu043du043e u0441u0438u0442u0435u043bu0435u043c petroleum product using it u0446u0438u0440u043au0443u043bu00a0u0446u0438u0438 to u0434u043eu0441u0442u0438u0436u0435u043du0438u00a0 u0437u043du0430u0447u0435u043du0438u00a0 normative temperature discharge, in which u0432u00a0u0437u043au043eu0441u0442u044c pumpable fuel provides the most complete emptying of tanks, u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0 orderask specific heat u0441u043bu0438u0432u0430u0435u043cu043eu0433u043e petroleum product, the coefficient of thermal conductivity of air and material of wall of the oil tank, u0432u00a0 u0437u043au043eu0441u0442u044c oil u0432u00a0u0437u043au043eu0441u0442u044c air, the three-dimensional u0440u0430u0441u0448u0438u0440u0435u043du0438u00a0 fuel, fuel density, the diameter of the tanks, the length of the boiler the thickness of the tank, the tank wall.the black surface of the tank, the temperature of the fuel tank of a frame rail and u043fu043eu0441u0442u043eu00a0u043du043du0443u044e bar u0437u0430u043cu0435u0440u00a0u044eu0442 those u043au0443u0449u0438u0435 u0437u043du0430u0447u0435u043du0438u00a0 environmental temperature, wind speed and temperature of an outer wall of the tank at the bottom of the u043eu0431u0435u0447u0430u0439u043au0438 railway, as u043fu0440u0438u0431u043bu0438u0436 u0435u043du043du043eu0439 to the bottom of tanks, which compared with the estimated value of this temperature.u043eu043fu0440u0435u0434u0435u043bu00a0u0435u043cu043eu0439 as dependency:;tu0441u0442u043du0440 = to + k / 1 (tu043du043f - to);where tu0441u0442u043du0440 - u0440u0430u0441u0447u0435u0442u043du0430u00a0 temperature of an outer wall of the tank, the temperature of the fuel u0441u043eu043eu0442u0432u0435u0442u0441u0442u0432u0443u044eu0449u0430u00a0 plum without balance.;to ambient (air), (u043fu043eu043au0430u0437u0430u043du0438u00a0 with sensor temperature);;tu043du043f - u043du043eu0440u043cu0430u0442u0438u0432u043du0430u00a0 temperature discharge of oil u043eu0431u0435u0441u043fu0435u0447u0438u0432u0430u044eu0449u0430u00a0 his plums without balance.;1 - the coefficient of heat transfer from the wall of the tank into the environment, Bm / (m2), equal;1 = 0032u0432 / l Re0,8;;k is the coefficient of heat transfer of oil into the environment, Bm / (u043c2u0441), u043eu043fu0440u0435u0434u0435u043bu00a0u0435u043cu044bu0439 formula;k = [1 / (1 + cm / cm + 1 / 2 + 1 / 3) 1.;where 2 is the heat transfer coefficient of the fuel to the tank wall, w / (u043c2u0441), u043eu043fu0440u0435u0434u0435u043bu00a0u0435u043cu044bu0439 on dependence;2 = 0,5u043du043f / Du0436u0434u0446 (gr pr) u043du043f1 / 4 [(pr)) / (pr) pts) 1 / 4;;3 - the coefficient of heat transfer from the wall of the tank by radiation, Bm / (u043c2C), equal;cmCs 3 = {[(tu0441u0442u043du0440 + 273) / 100] 4 - [(t0 + 273) / 100] 4} / (tu0441u0442u043du0440 - to);where cm is the thickness of the tank wall, m (passport number);;cm is the coefficient of thermal conductivity material of the railway tank Bm / (m c) (reference data);;ns, the coefficient of thermal conductivity oil Bm / (u043c2C) (reference data);;the coefficient of thermal conductivity of air, Bm / (ms) (reference data);;the diameter of du0436u0434u0446 railway tanks, m (passport number);;l is the length of the boiler, railway tanks, m (passport number);;re is the reynolds number is u0431u0435u0437u0440u0430u0437u043cu0435u0440u043du044bu0439 criterion u043fu043eu0434u043eu0431u0438u00a0, equal;re = Wu0432Du0436u0434u0446 / in;;pr - u0431u0435u0437u0440u0430u0437u043cu0435u0440u043du044bu0439 criterion u043fu043eu0434u043eu0431u0438u00a0 u043fu0440u0430u043du0434u0442u043bu00a0 calculated at the specified temperature a (normative) oil (ns) and the temperature of the internal tank wall (pts) on the next subject.;Pru043du043f = u043du043fcu043du043f ns / u043du043fu043du043f,;Pru0441u0442u0432 = u0441u0442u0432cu0441u0442u0432 pts / u043du043fu0441u0442u0432,;gr - u0431u0435u0437u0440u0430u0437u043cu0435u0440u043du044bu0439 criterion u043fu043eu0434u043eu0431u0438u00a0 u0433u0440u0430u0441u0433u043eu0444u0430, equal;gr = D3u0436u0434u0446gu043du043ft / 2u043du043f,;where ns (cu0441u0442u0432) - u0432u00a0u0437u043au043eu0441u0442u044c petroleum product at a temperature of discharge and the internal tank wall respectively, m2 / s (reference data);;sns (u0441u0441u0442u0432) - u0443u0434u0435u043bu044cu043du0430u00a0 heat the fuel at a temperature of discharge and the internal tank wall respectively, j / (kg) (reference data);;ns (pts) is the density of the fuel at a temperature of discharge and the inner tank wall respectively, kg / m3 (reference data);;ns is the three-dimensional u0440u0430u0441u0448u0438u0440u0435u043du0438u00a0 oil 1 / grad (reference data);;g acceleration forces u0442u00a0u0436u0435u0441u0442u0438 = 9,81 m / s2 (constant).;Wu0432 is the current value of the wind speed, m / s (u043fu043eu043au0430u0437u0430u043du0438u00a0 with sensor);;in u0432u00a0u0437u043au043eu0441u0442u044c air m2 / s (reference data);;cm - the black surface of the tanks (passport number):;cm = 1 - u0434u043bu00a0 black color.;cm = 0.8 - 0.95 - u0434u043bu00a0 red, green and gray;;cm = 0.7 u0434u043bu00a0 aluminum u043fu043eu043au0440u044bu0442u0438u00a0, t = (tu043du043f - tu0441u0442u0432u0440) - the difference of temperatures and internal fuel tank wall, where tu0441u0442u0432u0440 estimated internal temperature her wall of railway tanker, equal;tu0441u0442u0432u0440 = tu043e + k / 2 (tu043du043f to);;cs - u043fu043eu0441u0442u043eu00a0u043du043du0430u00a0 bar u0440u0430u0432u043du0430u00a0 5,76 Bm / (u043c2u043a4) (constant).;tu0441u0442u043du - current measured value temperature of an outer wall of u043eu0431u0435u0447u0430u0439u043au0438 railway tanks (u043fu043eu043au0430u0437u0430u043du0438u00a0 sensor);and in the tu0441u0442u043du tu0441u0442u043du0440 cease to preheat and u0446u0438u0440u043au0443u043bu00a0u0446u0438u044e u0433u0440u0435u044eu0449u0435u0433u043e petroleum product.