Discussion of Hydraulic Calculation Methods for Hot Water Heating Direct Return System

Abstract:

For hot water heating direct return system, the common hydraulic calculation method in engineering design is constant temperature drop method,which is calculated from the farthest riser loop. Due to the limit of the minimum pipe size, the method is usually difficult to achieve the hydraulic balance for every riser loop, and it needs the utilization of valves to meet the need. In this paper, through a calculation example, it has explained that every riser loop is very easy to achieve hydraulic balance without the utilization of valves when the system is calculated from the nearest riser loop. Besides, the calculation order of this method has been given.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 3049-3053
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.3049
• Online since: August 2013
• Authors: Yong Zheng Fu, Yao Xiong, Hui Hui Liu
• Keywords: Constant Temperature Drop Method, Direct-Return System, Loop

References

[1] Lu Yajun, in: heating ventilation and air conditioning (China Architecture & Building Press, Beijing 2008).

[2] Lu Yaoqing, in: Practical design manual of heating and air conditioning(China Architecture & Building Press, Beijing 2005).

[3] Tian Yuzhuo, Yan Quanying, Zhao Bingwen, in: heating engineering(China Machine Press, Beijing 2008).