<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>To accurately understand the insulation status of primary heating pipe network in the Chengyin District of Daqing City, its present insulation status has been tested through the enthalpy drop method. The field test results, with the data processing, are compared and analyzed, which reveals that there are weak links in the insulation structure of the primary heating pipe network in the Chengyin area. Before the insulation structure is optimized according to the field conditions, which provides a basis and reference for testing the insulation status of the heating pipe network, and has a guiding significance for evaluating and optimizing the insulation structure of pipe network.</p>
</abstract>

To accurately understand the insulation status of primary heating pipe network in the Chengyin District of Daqing City, its present insulation status has been tested through the enthalpy drop method. The field test results, with the data processing, are compared and analyzed, which reveals that there are weak links in the insulation structure of the primary heating pipe network in the Chengyin area. Before the insulation structure is optimized according to the field conditions, which provides a basis and reference for testing the insulation status of the heating pipe network, and has a guiding significance for evaluating and optimizing the insulation structure of pipe network.

Evaluation and optimization of insulation status test for primary heating network

School of Civil Engineering and Architecture

Applied Mathematics and Nonlinear Sciences

This work is licensed under the Creative Commons Attribution 4.0 International License.

To accurately understand the insulation status of primary heating pipe network in the Chengyin District of Daqing City, its present insulation status has been...

Pipe section	1	2	3	4	5	6	7	8	9	10
Survey point	Heat source Well	Well 7–Well 9	Well 9–Well 11	Well 11–Number 11 Station	Number 11 Station Well 87	Well 87–Well 21	Well 21–Number 1 Station	Well 21–Well 23	Well 23–Number 16 Station	Well 125–Number 34 Station
Pipe length/m	2803	913	642	800	675	1500	312	300	1912	249
Pipe diameter/mm	1000	1000	1000	1000	1000	1000	200	900	200	250
Entrance temperature/°C	80.60	80.31	80.22	80.15	80.00	79.89	79.63	79.63	79.57	79.53
Exit temperature/°C	80.31	80.22	80.15	80.00	79.89	79.63	79.3	79.57	67.2	78.9
Entrance enthalpy/J	337.97	336.75	336.37	336.08	335.45	334.99	333.9	333.86	333.61	333.61
Exit enthalpy/J	336.75	336.37	336.08	335.45	334.99	333.90	332.52	333.65	281.27	330.84
Flow/m³/h	3893.70	3893.70	3893.70	3893.70	3893.70	2453.88	97.8	2356.08	14.08	46.94
Density of the heat flow/W/m²	136.29	130.33	141.45	246.60	213.40	143.40	147.18	145.9	131.14	139.99
Excessive rate of the heat dissipation	−12.99	−18.16	−8.87	37.55	27.84	−7.39	−4.63	300	−17.43	−10.01

External surface temperature of equipment, pipes and accessories/K(°C)	323 (50)	373 (100)	423 (150)	473 (200)	523 (250)	573 (300)
Maximum allowable heat loss/(W/m²)	104	147	183	220	251	272

Evaluation and optimization of insulation status test for primary heating network

Publicado en línea: 08 abr 2021

Páginas: 181 - 188

Recibido: 27 nov 2020

Aceptado: 31 ene 2021

DOI: https://doi.org/10.2478/amns.2021.1.00031

Palabras clave
heating pipe network, insulation, testing, optimization

© 2021 Ma Chuan et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

The test data and evaluation results of insulation status of the primary heating pipe network (for water supply)

Maximum allowable heat dissipation loss value under seasonal operating conditions

Evaluation and optimization of insulation status test for primary heating network

Publicado en línea: 08 abr 2021

Páginas: 181 - 188

Recibido: 27 nov 2020

Aceptado: 31 ene 2021

DOI: https://doi.org/10.2478/amns.2021.1.00031

Palabras claveheating pipe network, insulation, testing, optimization

© 2021 Ma Chuan et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

The test data and evaluation results of insulation status of the primary heating pipe network (for water supply)

Maximum allowable heat dissipation loss value under seasonal operating conditions

Palabras clave
heating pipe network, insulation, testing, optimization