Modeling of CCHP system and analysis of thermal storage strategy by using TRNSYS software

ZHENG Chunyuan; ZHAI Xiaoqiang; WU Jingyi; YANG Gan

doi:10.11949/j.issn.0438-1157.20150708

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Modeling of CCHP system and analysis of thermal storage strategy by using TRNSYS software

更新时间：2025-12-10

- Modeling of CCHP system and analysis of thermal storage strategy by using TRNSYS software
- CIESC Journal Issue S2, Pages: 311-317(2015)
- 作者机构：
  
  上海交通大学机械与动力工程学院,上海,200240
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150708
  CLC： K019
- Online First：31 August 2015，
  
  Published：31 August 2015
- 稿件说明：
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ZHENG Chunyuan, ZHAI Xiaoqiang, WU Jingyi, et al. Modeling of CCHP system and analysis of thermal storage strategy by using TRNSYS software[J]. CIESC Journal, 2015, (S2): 311-317.
DOI：

ZHENG Chunyuan, ZHAI Xiaoqiang, WU Jingyi, et al. Modeling of CCHP system and analysis of thermal storage strategy by using TRNSYS software[J]. CIESC Journal, 2015, (S2): 311-317. DOI： 10.11949/j.issn.0438-1157.20150708.

摘要

冷热电联供是天然气高效利用的重要方面。以上海某医院为例

基于Trnsys与Matlab软件建立了天然气冷热电联产系统的动态仿真与控制模型。对传统蓄能策略、"主动蓄能"策略和新型蓄能策略进行了描述。利用该模型计算了系统在不同蓄能容量与控制策略下的效率、一次能源节约率和投资回收期

并进行了对比分析。结果表明

"主动蓄能"策略下联供系统对建筑供能的贡献率低

性能差于其他蓄能策略;新型蓄能策略下的系统运行时间能得到很大的延长。它能有效发挥蓄能设备的作用

使联供系统为建筑提供更多的高效能量。电力不能上网的条件下

联供系统的节能潜力受到很大的限制。

Abstract

In building applications

electrical load and thermal load vary significantly.And they are not synchronized.Therefore

the mismatch issue between energy supply and demand should be solved.The use of thermal storage systems could help improving energy demand coupling with energy generation profiles.The former researches pay attention on the influence of the size of the thermal storage.In this paper

the influences of three thermal storage strategies(TSS)on CCHP system are evaluated and analyzed.Firstly

the dynamic and control model is built by using TRNSYS and MATLAB software.Secondly

the principle and distinction of these three TSSs are analyzed.The traditional thermal strategy(TSS1)determines the operation of power generation Unit(PGU)only by the energy demand of the building.The active thermal storage strategy(TSS2)determines the on-off operation of PGU only by the state of the storage tank.The novel thermal storage strategy(TSS3)determines the operation of PGU by both energy demand and the state of the tank.Lastly

the impacts of TSSs on the performance of CCHP system are evaluated and analyzed through a case study of a hospital in Shanghai.The results show that TSS3 has the best performance.Compared with TSS1 and TSS2

operation time of PGU is longer

and more electric and thermal energy are produced by PGU to satisfy the demand of building with the same size of the storage tank.It is said that the storage capacity of the tank is effectively used to improve the performance of the system.When electricity produced by CCHP system cannot sell to the grid

the energy saving potential of CCHP system is significantly limited.

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