EA030311B8 - Air cooling apparatus - Google Patents

Abstract

The invention is related to surface-type recuperative heat exchangers of air cooling apparatus (ACA) type that are generally used for natural gas cooling at compressor stations of trunk gas pipelines, in rectification oil-separation units, in large-scale production of ammonia for mineral fertilizers, for cooling oil in large power transformers, for water steam condensation in steam turbine plants. A horizontal apparatus comprising a bank of horizontally disposed heat-exchange sections with side walls and multi-row bunches of bimetallic ribbed tubes, an axial motor-driven blower fan, a diffuser having a circular cross-section in the area of the fan impeller rotation and a polygonal, preferably rectangular cross-section in the area of joining to the bank of heat-exchange sections at the bottom, a louvre device, a support metal structure, further includes an intensifying grid located inside the upper portion of the diffuser and consisting of horizontal bars mounted so that each adjacent pair of the bottom row of bimetallic ribbed tubes of the heat-exchange section is provided with a guide bar with a longitudinal axis parallel to and equally spaced from longitudinal axes of this pair of bimetallic ribbed tubes, wherein the bar does not contact external ends of tube ribs, and guide bars have an isosceles triangular cross-section with a base disposed in the horizontal plane and an apex directed to the heat-exchange section. The invention makes it possible to reduce annual power consumption by the fan drive, to improve economical effectiveness by 5-10%, and to decrease the cost of products manufactured by the production unit due to lower amount of power spent for auxiliaries.