Aerial cooling of the gas

AERIAL COOLING OF THE GAS (EN: air gas cooling; DE: Luftkuhlung von Gasen, Gasluftkuhlverfahren; FR: refroidissement de gaz par l'air; ES: enfriamiento de gas por aire; RU: воздушное охлаждение газа) is the lowering of the temperature of the natural and associated petroleum gases at the gas collection points, at the compressor stations of the trunk gas pipelines, and at the gas processing industrial plants, thanks to the usage of the atmospheric air as the cooling agent. For the aerial cooling of the gas, they use the heat exchanging apparatuses of the recuperative type (the product, which is being cooled, and the cooling air, which have the different temperatures, are separated by the wall between them). The heat exchange proceeds thanks to the convection within the coolants, thanks to the thermal conductivity of the wall, and thanks to the thermal radiation. The heat transferring surface within the apparatuses, namely, within the monometallic pipe (aluminium, brass, and so on), and within the bi-metallic pipe (the internal component is made of the carbon steel, chromium steel, or stainless steel), is equipped with the cooling fins. For the pipes of the latter type, these cooling fins are made of the aluminium. The gas, which is being cooled, moves through the pipes, and the air, which is delivered by the ventilator, moves through the channels, which have been formed by the external surfaces of the cooling fins. In case of the shutdown of the ventilator, the product is cooled thanks to the free convection (the efficiency of the heat exchange decreases by 80%). The maximal temperature of the gas within the pipes of the apparatuses is up to 130 degrees Celsius, the maximal pressure is several tens of the atmospheres. After the cooling, the temperature of the gas is by 15-20 degrees Celsius higher, than the magnitude of same indicator for the atmospheric air, which is delivered by th e ventilator. Within the apparatuses of this type, they cool the technological products from the processing of the petroleum and so on, which is significantly more economical, than within the heat exchangers with the usage of the water.