A Study on Freezing Assessment of the Water in the Z-Trap of Sewage Bay

Title & Authors
A Study on Freezing Assessment of the Water in the Z-Trap of Sewage Bay
Lee, Changwoo; Oh, Seungju;

Abstract
This study clarifies the simulation on freezing of remaining water in the Z-trap set up in the PVC sewage bay to control malodor. It made use of commercial FEM LAB program(ver. 3.2) well known as a solution of the problems arising in the flow of various fluid, heat transfer and mass transfer. Simulation results under the temperature $\small{-20^{\circ}C}$ outwards show that the water in the Z-trap set up in the sewage bay to control malodor freeze in the 60cm under the ground level after 14 days in the wet ground, and after 17 days in the regular ground. On the other hand, if the soil is dry even after the 42 days does not go down below freezing. Therefore, the water in the Z-trap was confirmed that it does not freeze.
Keywords
Z-trap;sewage bay;FEM LAB 3.2 program;malodor;heat transfer;
Language
Korean
Cited by
References
1.
C. S. Lee, D. S. Shin, H. D. Lee(2015), Study on Seismic Fragility Analysis of Water Supply Facilities, Journal of the Korean Society of Disaster Information, Vol. 11 No.1, pp. 35-43

2.
C. H. Choi (2005), A Study on Efficient Maintenance and Management of the Sewage Conduits in Korea, Yonsei University.

3.
D. H. Ahn (2010), The Major Problems and Improvement in Drainage Facility for Sewer Rehabilitation, Gyeongsang National University.

4.
H. J. Park (2011), Improvement for Asset Management of Sewage Treatment Facilities, Journal of the Korean Society of Civil Engineers, 31(2D), pp. 285-293.

5.
K. S. Kim (2000), Consideration for the Performance of Functional Improvement in the Sewer System, Seoul Urban Research, 1(2), pp. 49-64.

6.
Ministry of Environment(MOE) (2005), Practice Guideline for Public Sewer Maintenance & Repair.

7.
Ministry of Environment(MOE) (2010), Standard Output Specification for BTL Sewerage Projects.

8.
Ministry of Public Administration and Security(MOPAS) (2012), Accounting and financial Reporting Regulation for Local Government.

9.
Ministry of Strategy and Finance(MOSF) (2012), Submitting The National Financial Statement of 2011 Fiscal Year to The National Assembly, Press Release of 31th, May, 2012 (in Korean).

10.
S. I. Lim (2000), The Principles, Strategies for Reforming the Budgeting and Accounting System in the Korean Local Governments, the Korea Local Administration Review, 14(1), pp. 1-30.