SU918171A1 - Method of protecting tender cargo in ship holds againsi condensate - Google Patents

Description

(5) METHOD OF PROTECTION AGAINST CONDENSATE TRANSPORTABLE IN ROUTS OF SHIPS OF REGULAR LOADS IN SHIPS

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The invention relates to piling, in particular, to methods of protection against condensate of regime cargoes transported in the holds of vessels.

There is a known method of protection against condensate of regime cargoes transported in the holds of vessels, which consists in laying a protective coating and a ventilator and a hold p on the top layer of the cargo stack}

However, this method of protecting cargo cargo from condensate is ineffective.

The purpose of the invention is to increase the efficiency of the method of protection against condensate of regime cargoes transported in the territory of vessels,

The goal is achieved by placing a protective coating of thermal insulation material on the top layer of the cargo stack, and ventilating only the superstructure space of the hold.

FIG. 1 is a schematic representation of a ship with a decided cargo covered with thermal insulation material, a cross section; in fig. 2 is a plot of temperatures in a vessel's hold.

The proposed method is implemented as follows.

After placing the cargo in the hold on the top layer, etapep 1 is placed

10 thermal insulation coating 2, thermally divided the hold into two zones - the zone where the cargo is located, and the super-scale space 3, which is ventilated during the transportation of the cargo.

During the maritime transport of goods to areas of high latitudes in the autumn-autumn-spring period, the temperature of the outside air (t.j,) sharply decreases

20 s. The temperature of the upper deck (tn) is almost always close to the outside air temperature, since there is no thermal insulation of the deck. Since the heat from | Ruz is transferred to the super-scale space 3 through the layer of thermal insulating material 2, the heat input to the space 3 is insignificant. To prevent air heating in the above-scale space, it is ventilated. Air is supplied by an injection fan, passes over the surface of the heat insulating material, and is removed from the hold by an exhaust fan. At the same time, the temperature of the lower surface of the heat insulating material will be equal to the temperature of the cargo, and its upper surface will acquire the temperature of the superstructure space. Thermal calculations showing that the outer surface of the heat-insulating material is not heated during transportation, since its surface is continuously heated by a stream of fresh, more cold air. Thus, as a result of laying the heat insulating material, the vessel's hold is divided into two temperature zones. 2). The temperature of zone 1 is equal to the temperature of the cargo (tpp), and in zone II during ventilation, the temperature of 1cr is almost equal to the temperature of the outside air t. In this case, the temperature difference At tpp-tj occurs directly in the layer of heat insulating material. Since, in the proposed method, the temperature of the hold ceiling (tpj) is equal to the temperature of the scale space (), this excludes the cause of the formation of condensate.

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Claims (1)

NL / Thermal insulation material is gathered from individual slabs of material with a low thermal conductivity coefficient, which has sufficient strength and is reusable. The material can be recommended polystyrene grade PS-1, 1.5, 2, commercially available. Ventilation of the above-scale space according to the proposed method does not require a device in the bilge of a complex and extensive ventilation network and saves a part of the useful cargo volume. In addition, a number of dry cargo vessels are equipped with ventilation systems, which mainly correspond to the inventive method, and do not require significant redevelopment. Claims The method of protection against condensate of transportable cargo transported in the ship holds, consisting in laying a protective coating on the top layer of the load and ventilating the hold, characterized in that, in order to increase its efficiency, a protective coating is laid on the top layer of the cargo stack , and ventilate only the superstructure space of the hold. Sources of information taken into account during the examination 1. Andronov L, P. Cargo and stevedoring operations. M., Transport, 1975, p. 130-131, 221-222 (prototype). P 7efinep0fnyf / ff / r -tnr TefffKfpa myffwrJf SOffOt Mt 0Vf.l