At present

the study on thermodynamic calculation of cooling towers running in parallel is insufficient. On the basis of analyzing the characteristics of parallel operation of natural ventilation cooling towers

this paper carries out a comprehensive study on thermodynamic calculation methods for cooling towers in parallel operation

by using the enthalpy potential method

exhaustion method and regression analysis method. Moreover

combining with the practical examples

it verifies the effectiveness of the methods. The results show that

in parallel operation

the parameters of the two cooling towers

such as the structural type

climatic conditions

water inlet temperature

equivalent temperature rise

and the temperature rise of the cooling water flowing in and out of the condenser

are the same. The evaporation loss of the circulating water of one unit with double-tower and one unit with one tower are equal. Compared with the operating mode of one unit with one tower

the parallel operation of one unit with double-tower can save the energy significantly at different loads. The results can provide references for relevant renovation projects and the analysis on operational energy saving.