Recently, the evaporative condenser designed and produced by GH Cooling are being installed and commissioned at the petrochemical industry customer site of the waste heat power generation project. The successful application of the evaporative condensers in the petrochemical industry is another big leap for GH Cooling.
Advantages of using evaporative condensers in waste heat recovery
①Energy saving. On the one hand, the evaporative condenser combines the condensation of water vapor with the water cooling process, omitting the transfer stage of cooling water from the cooling tower to the condenser, and the circulating water volume is only 5% to 10% of the water-cooled type. The input power of the cooling water pump is effectively saved; on the other hand, the cooling water temperature of the evaporative condenser is closer to the air wet bulb temperature, and the corresponding condensing temperature can be lower, and its condensing temperature is 8~11 ℃ lower than that of the air-cooled condensing system , which is 3~10℃ lower than that of the water-cooled condensing system, thereby improving the efficiency of the entire waste heat power generation system.
② save water. The temperature rise of the cooling water in the condenser is about 5~8℃, that is, 1kg of water takes away 25~35kJ of heat, while the evaporative condenser mainly completes heat exchange through the latent heat of cooling water, and 1kg of water absorbs heat and evaporates. Taking 2450kJ of heat, the actual water consumption of the evaporative condenser in operation is 5% to 15% of the original, saving water resources.
③The effect of cold exchange is good. On the one hand, due to the large latent heat of evaporation of water and the large heat absorption per unit of water, water, air and cooling medium flow alternately inside and outside the heat exchanger, making the heat transfer speed faster and the heat transfer efficiency increased, so as to achieve better performance. Cold exchange effect; on the other hand, due to its use of enhanced heat exchange technology, the efficiency of the system can be greatly improved.
④ Small footprint. The evaporative condenser integrates the cooling process of the condenser and the cooling water, so that the air and water are forced to exchange heat and moisture, and the heat exchange efficiency is high, so that the process of heat exchange and removal can be completed in a small space. Moreover, the evaporative condenser has a very compact structure, so its area is only equivalent to 30% to 60% of the total area of the condenser and cooling tower, which is of great significance in today's increasingly tight land resources.
⑤Compact structure, easy to install and maintain. Because the two processes of heat and mass transfer are completed at one time in the evaporative condenser, there is no need for a cooling tower. Compared with the cooling tower cold exchange equipment in the waste heat system, the structure is more compact, and it is easier to form a whole during manufacturing. It brings great convenience. When a fault occurs, maintenance becomes easier, which reduces the difficulty and cost of project implementation.
⑥ Low operating costs. In operation, in addition to the energy-saving and water-saving effects mentioned above, the evaporative condenser also eliminates the water treatment problem caused by a large amount of water in the cooling tower system, which greatly reduces the operating cost. The comprehensive initial investment of condenser and cooling tower is actually higher than that of evaporative condenser.
It can be seen from the above that the use of evaporative condensers to replace the condenser and cooling tower equipment in waste heat power plants can not only achieve the goal of energy saving and water saving, but also have great significance for the safe and economic operation of waste heat power plants and the realization of sustainable development. Evaporative condenser equipment has opened up a new road, and it is worth vigorously popularizing and applying in today's energy shortage.