建筑节能
建築節能
건축절능
Building Energy EFFICIENCY
2015年
11期
53-57,65
,共6页
相变材料%蓄热单元%蓄放热特性%性能评估
相變材料%蓄熱單元%蓄放熱特性%性能評估
상변재료%축열단원%축방열특성%성능평고
phase change material%thermal storage unit%characteristic of heat charge and discharge%performance evaluation
采用QN-2相变材料,设计并制作了同心套管式蓄放热单元,搭建了相变蓄热单元性能测试试验台,分别对在不同工况下的蓄放热进行了研究,分析了在改变热媒水的流量、进口温度变化、内管加入翅片的条件下对蓄放热过程的影响.研究结果表明:增大热媒水与蓄热材料的温差和热媒水的流量可以缩短蓄放热时间,在加入翅片的条件下对放热过程的影响没有对蓄热过程大.初步掌握同心套管式蓄热单元的蓄放热特性,为今后相变蓄热器的选型和性能的评估提供参考依据.
採用QN-2相變材料,設計併製作瞭同心套管式蓄放熱單元,搭建瞭相變蓄熱單元性能測試試驗檯,分彆對在不同工況下的蓄放熱進行瞭研究,分析瞭在改變熱媒水的流量、進口溫度變化、內管加入翅片的條件下對蓄放熱過程的影響.研究結果錶明:增大熱媒水與蓄熱材料的溫差和熱媒水的流量可以縮短蓄放熱時間,在加入翅片的條件下對放熱過程的影響沒有對蓄熱過程大.初步掌握同心套管式蓄熱單元的蓄放熱特性,為今後相變蓄熱器的選型和性能的評估提供參攷依據.
채용QN-2상변재료,설계병제작료동심투관식축방열단원,탑건료상변축열단원성능측시시험태,분별대재불동공황하적축방열진행료연구,분석료재개변열매수적류량、진구온도변화、내관가입시편적조건하대축방열과정적영향.연구결과표명:증대열매수여축열재료적온차화열매수적류량가이축단축방열시간,재가입시편적조건하대방열과정적영향몰유대축열과정대.초보장악동심투관식축열단원적축방열특성,위금후상변축열기적선형화성능적평고제공삼고의거.
Aphasechangethermalstorageunit,inwhichQN-2wasaphasechangematerial(PCM), with the concentric bushing was designed. The thermal performances of the storage unit in different situa-tions were recorded experimentally. Analyzing three conditions how to affect heat storage unit energy trans-fer performance, such as the inlet fluid temperature and flow and finned inner tube. Experiment results show that increasing temperature between the heat medium water and PCM can make the time shorter and the effect on the process of heat storage is larger than heat release with the finned inner tube. The results offer the reference in phase change thermal storage design and performance optimization in the future by understanding the characteristic of heat charge and discharge.
