多分区吸收式机组的运行性能实测与调节特性分析

段颢俊; 谢晓云

doi:10.12465/issn.0253-4339.20260904003

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多分区吸收式机组的运行性能实测与调节特性分析

XXXX | 更新时间：2026-11-02

- 多分区吸收式机组的运行性能实测与调节特性分析
- Field Measurement of Operating Performance and Analysis of Regulation Characteristics of a Multi-Zone Absorption Heat Exchanger Unit
- 制冷学报 2026年页码：1-8
- 作者机构：
  
  清华大学建筑节能研究中心北京 100084
- 作者简介：
  
  谢晓云，女，副教授，清华大学建筑节能研究中心，010-62793591，E-mail：xiexiaoyun@tsinghua.edu.cn。研究方向：吸收式热泵、蒸发冷却技术、热学原理。
- 基金信息：
  
  国家重点研发计划项目(2024YFC3810000)
- DOI：10.12465/issn.0253-4339.20260904003
  中图分类号：
- 网络首发：2026-11-02，
- 稿件说明：
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段颢俊，谢晓云. 多分区吸收式机组的运行性能实测与调节特性分析［J］. 制冷学报，XXXX，XX（XX）：1-8.

Duan Haojun，Xie Xiaoyun. Field Measurement of Operating Performance and Analysis of Regulation Characteristics of a Multi-Zone Absorption Heat Exchanger Unit［J］. Journal of Refrigeration，XXXX，XX（XX）：1-8.
段颢俊，谢晓云. 多分区吸收式机组的运行性能实测与调节特性分析［J］. 制冷学报，XXXX，XX（XX）：1-8. DOI： 10.12465/issn.0253-4339.20260904003.

Duan Haojun，Xie Xiaoyun. Field Measurement of Operating Performance and Analysis of Regulation Characteristics of a Multi-Zone Absorption Heat Exchanger Unit［J］. Journal of Refrigeration，XXXX，XX（XX）：1-8. DOI： 10.12465/issn.0253-4339.20260904003.

摘要

多分区吸收式机组可在1台机组内集成多个独立二次网回路，在保持吸收式换热大温差优势的同时实现分区供热，但该型机组目前缺乏实际运行数据支撑。本文针对山西省某市2台双分区吸收式机组开展采暖季实测，连续监测机组各节点温度并进行流量测试。结果表明：在一网供水温度低于设计值的变工况下，2台机组均能将一网水深度冷却至20～25 ℃，二网供水稳定在35～42 ℃，整体效能系数分别为1.33和1.36，性能系数（COP）维持在0.6～0.8，达到普通双级吸收式换热器水平，运行效果良好。热平衡校验显示，B小区一二次侧换热量不平衡率为13.12%，满足±15%的可靠性要求；A小区不平衡率达23.84%，略超阈值，其数据仅供参考，后续分析以运行稳定的B小区为主。分区调节方面，高、低区二网在回水温度差异明显的条件下供水始终接近，两区换热量可按实际需求独立分配，表明机组具备良好的分区独立调节能力。

Abstract

Objective

Multi-zone absorption heat exchanger （AHE） units integrate multiple AHE modules sharing a primary water circuit while serving independent secondary heating zones， thereby combining large-temperature-difference heat transfer with zone-specific heating. However， field operating data and an understanding of zone regulation characteristics remain scarce. This study aims to experimentally investigate the operational performance and independent zone regulation capability of dual-zone AHE units in actual district heating projects.

Methods

Field tests were conducted on two dual-zone AHE units serving two residential districts （Community A and Community B） in a city in Shanxi Province， China， during the 2025-2026 heating season. Both units use lithium bromide-water （LiBr-H

O） solution as the working pair， with design primary network temperatures of 105/20 ℃ and secondary network temperatures of 47/37 ℃. The rated heating capacities are 16 200 kW for Community A （model AHE162） and 10 800 kW for Community B （model AHE108）. Temperatures at 18 measurement points covering the inlets and outlets of all generators， condensers， evaporators， absorbers， and plate heat exchangers （PHEs） were continuously recorded at 5-min intervals using temperature loggers with an accuracy of ±0.2 ℃ from January 23 to April 1， 2026. Two flow measurement campaigns were performed using clamp-on ultrasonic flow meters with an accuracy of ±0.5%. The coefficient of performance （COP） of each absorption stage and the overall unit effectiveness were evaluated， and a heat balance check was conducted. A temperature-heat

flow （T-Q） diagram was constructed for the Community B unit， and the zone regulation characteristics in terms of temperature and load independence were analyzed.

Results and Discussions

Throughout the test period， the primary supply temperature ranged from 55 to 95 ℃， substantially below the design value of 105 ℃. Nevertheless， both units achieved deep cooling of primary water to 20-25 ℃， while secondary supply temperatures remained stable at 35-42 ℃， satisfying space heating demands. The overall effectiveness values were 1.33 for Community A and 1.36 for Community B， and the COP ranged from 0.6 to 0.8， comparable to reported values for conventional dual-stage AHEs （effectiveness of 1.2-1.43）. The heat balance discrepancy was 13.12% for Community B， within the ±15% acceptance threshold， and 23.84% for Community A， which was attributed to large primary water temperature fluctuations during testing. For Community B， the low-zone COP （0.79） was notably higher than the high-zone COP （0.62）. This was explained by the smaller log mean temperature difference （LMTD） of the low-zone solution heat exchanger （2.89 K versus 4.77 K）， indicating more effective internal heat recovery that brought the dilute solution closer to saturation before entering the generator. The T-Q diagram revealed nearly parallel temperature profiles and small vertical gaps between hot and cold streams in the generator and absorber， indicating uniform heat transfer temperature differences， good thermal matching， and low entransy dissipation. Regarding zone regulation， the mean temperature difference between the high- and low-zone secondary returns was 2.01 ℃， whereas that between the secondary supplies was only 0.36 ℃， demonstrating that the two zones maintained nearly identical supply temperatures despite different return conditions. The zone heat loads could be independently adjusted： at Community A the high- and low-zone heat duties were similar （598 kW versus 589 kW）， while at Community B they differed substantially （508 kW versus 852 kW， approximately 68% higher in the low zone）， with the low-zone PHE carrying proportionally more primary flow （16.18 t/h versus 5.98 t/h）， confirming adaptive load allocation between zones.

Conclusions

The dual-zone AHE units maintained high effectiveness and COP under off-design conditions with primary supply temperatures well below the design value， achieving deep primary cooling comparable to conventional single-zone AHEs while simultaneously satisfying the heating demands of two independent zones. The two zones exhibited independent temperature and load regulation， confirming the feasibility and operational flexibility of multi-zone AHE technology for high-rise building district heating.

关键词

Keywords

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