A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Mixed filler formula for heat transfer of ground heat exchanger
The invention relates to a mixed filler formula for heat transfer of a ground heat exchanger. The mixed filler formula comprises the following components in parts by weight: 100 parts of cement; 45-58parts of fresh water; 35-38 parts of sand; 0.5-2 parts of retarder; 4-6 parts of silicon powder; 20 parts of fly ash; 1 part of a water reducing agent; 0.01-0.02 parts of an air entraining agent; 0.5-2 parts of graphite; and 2.3 parts of a toughening fiber anti-leakage agent. The mixed filler has a relatively high heat conductivity coefficient; the heat transfer requirement of the ground heat exchanger in a geothermal well cementing filler is met; the heat transfer effect of the ground heat exchanger is improved; the water reducing agent, the air entraining agent, the graphite and the toughening fiber leakage-proof agent are added, the physical property of the mixed filler is modified and optimized, the requirement for rapid well cementation is met, when the mixed filler is used in fractured geology, the purpose of plugging cracks and pores is achieved through the friction, hanging resistance and retention effects between the mixed filler and the pores and between the mixed filler andthe walls of the cracks, the leakage phenomenon is avoided, the well cementation quality is improved, and meanwhile the well cementation cost is saved.
本发明是一种用于地埋管换热器传热的混合填料配方，其重量份数组成如下：水泥100；淡水45‑58；沙子35‑38；缓凝剂0.5‑2；硅粉4‑6；粉煤灰20；减水剂1；引气剂0.01‑0.02；石墨0.5‑2；增韧纤维防漏剂2.3。本发明具有较高的导热系数，满足了地埋管换热器在地热井固井填料中的传热要求，提高了地埋管换热器的热传热效果，通过添加减水剂、引气剂、石墨和增韧纤维防漏剂，对混合填料的物性进行改性和优化，既满足了快速固井的要求，在裂缝性地质使用时，又利用与孔隙、裂缝壁间的摩擦、阻挂和滞留作用，达到封堵裂缝和孔隙的目的，解决了漏失现象，继而改善了固井质量的同时又节约了固井成本。
Mixed filler formula for heat transfer of ground heat exchanger
The invention relates to a mixed filler formula for heat transfer of a ground heat exchanger. The mixed filler formula comprises the following components in parts by weight: 100 parts of cement; 45-58parts of fresh water; 35-38 parts of sand; 0.5-2 parts of retarder; 4-6 parts of silicon powder; 20 parts of fly ash; 1 part of a water reducing agent; 0.01-0.02 parts of an air entraining agent; 0.5-2 parts of graphite; and 2.3 parts of a toughening fiber anti-leakage agent. The mixed filler has a relatively high heat conductivity coefficient; the heat transfer requirement of the ground heat exchanger in a geothermal well cementing filler is met; the heat transfer effect of the ground heat exchanger is improved; the water reducing agent, the air entraining agent, the graphite and the toughening fiber leakage-proof agent are added, the physical property of the mixed filler is modified and optimized, the requirement for rapid well cementation is met, when the mixed filler is used in fractured geology, the purpose of plugging cracks and pores is achieved through the friction, hanging resistance and retention effects between the mixed filler and the pores and between the mixed filler andthe walls of the cracks, the leakage phenomenon is avoided, the well cementation quality is improved, and meanwhile the well cementation cost is saved.
本发明是一种用于地埋管换热器传热的混合填料配方，其重量份数组成如下：水泥100；淡水45‑58；沙子35‑38；缓凝剂0.5‑2；硅粉4‑6；粉煤灰20；减水剂1；引气剂0.01‑0.02；石墨0.5‑2；增韧纤维防漏剂2.3。本发明具有较高的导热系数，满足了地埋管换热器在地热井固井填料中的传热要求，提高了地埋管换热器的热传热效果，通过添加减水剂、引气剂、石墨和增韧纤维防漏剂，对混合填料的物性进行改性和优化，既满足了快速固井的要求，在裂缝性地质使用时，又利用与孔隙、裂缝壁间的摩擦、阻挂和滞留作用，达到封堵裂缝和孔隙的目的，解决了漏失现象，继而改善了固井质量的同时又节约了固井成本。
Mixed filler formula for heat transfer of ground heat exchanger
一种用于地埋管换热器传热的混合填料配方
LI XINLIANG (author) / LI YAODE (author) / ZHOU ZHUJUN (author) / YANG YONGWEI (author) / GE ZHANYU (author) / WEI YANHUI (author) / LIU ZHENG (author)
2020-07-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Heat-conducting filler for riser heat exchanger and construction method of heat-conducting filler
| European Patent Office | 2024
Case study of heat transfer behavior of helical ground heat exchanger
| Online Contents | 2012
Case study of heat transfer behavior of helical ground heat exchanger
| Elsevier | 2012