Characteristic analysis of cost index for ventilation and air conditioning in underground railway projects

Taking the cost index of underground railway ventilation and air conditioning as the research object, selects 74 underground railway lines as sample projects. Combined with three general statistical indexes (line length, number of stations, building area) and three specific thermodynamic indexes (climate zones, outdoor design dry-bulb temperature and specific enthalpy for summer air conditioning), performs the linear regression analysis of the cost index of underground railway ventilation and air conditioning in the sample projects. The results show that there are good linear fitting relationships between the cost index of underground railway ventilation and air conditioning and the general statistical indexes, and there are also obvious classification association relationships and change laws between the cost index of underground railway ventilation and air conditioning and the specific thermodynamic indexes.