Full
Outline
To investigate the key influencing parameters on the performance of a coupled system of gas boilers and high‑temperature heat pumps（HTHP），an existing gas boiler was retrofitted to establish a boiler‑coupled high‑temperature heat pump experimental platform.The effects of boiler load，circulating water flow rate，and condenser water supply flow rate on system performance were explored.The study shows that within the boiler load range of 35% to 95%，for every 10% increase in load，the flue gas waste heat recovery amount，high‑temperature heat pump outlet water temperature，and heating coefficient of performance （COP） increased by an average of 8.08%，4.72% and 3%，respectively.Under the condition of 90% boiler load and within the circulating water flow rate range of 3 to 11 m3/h，for every increase of 2 m3/h in flow rate，the flue gas waste heat recovery amount and recovery rate increased by an average of 4.86% and 2.06%，respectively，while the high‑temperature heat pump outlet water temperature and COP increased by an average of 3.46% and 3.4%，respectively.Within the condenser water supply flow rate range of 0.5 to 0.7 m3/h，for every increase of 0.05 m3/h in flow rate，the high‑temperature heat pump outlet water temperature decreased by an average of 7.1 ℃.By using the high‑temperature heat pump to raise the condenser water supply temperature from 29.3 ℃ to 123.7 ℃，the high‑temperature heat pump COP reached 3.13，the boiler exhaust gas temperature dropped to 43.5 ℃，and a flue gas waste heat recovery rate of 5.02% was achieved.This study provides a theoretical basis for optimizing the operational parameters of gas boiler‑coupled high‑temperature heat pump systems and facilitates the promotion and application of high‑temperature heat pump products in boiler flue gas waste heat recovery.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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