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City Heating System

City Heating System


City Heating System

Centralized heating refers to the steam and hot water generated from the central heat source, which supply the heat needed for producing, heating and living in a city (town) or part of a region via the pipeline network. Steam and hot water will lose heat during transmitting, how to minimize the heat loss and ensure the safe, stable and effective operation of the pipeline network, are the strict requirements for thermal insulation structure of pipelines. Especially with the implementation of national energy saving and emission reduction policy, small boilers are gradually demolished and pipelines are gradually lengthened. At present, traditional materials such as aluminum silicate, rock wool are frequently used. The poor hydrophobic performance of insulation structure leads to serious settlement, high heat loss, serious temperature drop and high maintenance cost; the heavy insulation structure leads to high cost of construction and transportation.


1. Low thermal conductivity, thinner insulation layer, smaller coat steel, significant reduction of heat loss; small excavation volume is beneficial to urban design.
2. Hydrophobic rate reaches 99% and more, which avoids the settlement caused by water intake of the insulation layer.
3. Superior fire resistance performance
4. Good compressive and tensile properties, stable structure
5. Service life is more than 20 years
6. Inorganic and environmentally friendly, increase the safety and reliability of equipments
7. Easy to construct and install



Solar Thermal System

Solar thermal power generation is an important aspect of solar thermal utilization. This technology uses collectors to collect the solar radiation heat through the heat storage medium (molten salt and heating oil), then concentrates the heat to feed water to generate steam, and generates electricity through steam turbines and generators.
At present, traditional materials such as aluminum silicate, rock wool are frequently used for heat storage tank and pipeline. Which leads to high heat loss. Because of the preciousness of the energy, how to reduce the heat loss and improve the uiliation of solar energy is particularly important.


1. Effectively reduce the heat loss of the pipeline and improve the utilization and conversion rate of light and heat;

2. Inorganic materials, stable structure, and a service life of up to 20 years;

3. Low thermal conductivity, reducing the thickness of the insulation layer;

4. Convenient construction and easy cutting.


The specific comparison with traditional insulation materials is shown in the table below


Lightweight series Nano Aerogel Thermal Insulation Felt

Traditional insulation materials

Aluminum silicate Glass wool

Rock wool

Thermal conductivityW/(m·K)
















Maximum use temperature,℃





Bulk density,kg/m³





Water resistance Water repellency rate ≥99%, volume moisture absorption rate ≤1%, no special waterproof measures are required. The detachable thermal insulation cover has good thermal insulation effect and is easy to use. It is not completely waterproof, and the surface of the protective plate needs to be sprayed with metal sealant for waterproofing.
Insulation of tees, valves, etc. The detachable thermal insulation cover has good thermal insulation effect and is easy to use. Spraying method or heat preservation box heat preservation, the heat preservation effect is poor
Compressive strength (25%)


Felt products: Compression becomes larger

Plate-shaped products: brittle and fragile


1. Good integrity, good seismic and tensile resistance, no particle accumulation, sedimentation, etc. during use; 2. The shrinkage rate in the 20-year simulation test is less than 1%, and the thermal conductivity has no change.

1. The material structure is loose, self-weight, equipment vibration, material water ingress, etc. easily cause the material to disintegrate and settle, and the heat preservation effect is obviously reduced.


The use of small thickness can reduce the insulation thickness of the pipeline, reduce the spacing of the steam pipeline, and reduce the area of the plant or the size of the pipe gallery. The insulation layer is thick, and there are gaps in the lap joints. The higher coefficient of expansion and contraction can easily cause the gaps to become thermal bridges, which are more obvious after vibration.


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