Air conditioning cooling in winter and air conditioning water system selection

In the northern area of our country, the indoor temperature of some public buildings is too high in winter. This problem is coming up with the increasingly large scale construction and better building envelope insulation. Two-pipe air conditioning water system combined with outdoor air cooling and four-pipe water system are two vital systems for heating and cooling solution. Demonstrates the feasibility and limitations of the two-pipe air conditioning water system combined with outdoor air cooling, presents the advantages and disadvantages of the four-pipe air conditioning water system, and puts forward the application range of these two kinds of systems.