Investigating the performance of adsorption chiller operating under fluctuating heat-source conditions
Adsorption refrigerators are crucial for recovering low-grade waste heat and enhancing energy efficiency. The heat source temperature significantly influences the performance of adsorption refrigerators, which can vary in practical applications. In this study, a double-bed adsorption refrigerator wa...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-04-01
|
| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25001637 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Adsorption refrigerators are crucial for recovering low-grade waste heat and enhancing energy efficiency. The heat source temperature significantly influences the performance of adsorption refrigerators, which can vary in practical applications. In this study, a double-bed adsorption refrigerator was constructed using a silica/copper-chip composite as the adsorbent. Experimental investigations were conducted to evaluate how various operation parameters affect the cooling performance of this silica/copper-chip adsorption refrigerator. The sensitivity analysis revealed that the cooling capacity is most sensitive to changes in cooling water, followed by chilled water, and then hot water. For the coefficient of performance (COP), the order of sensitivity is chilled water, cooling water, and finally hot water. Considering the operational temperature range of proton exchange membrane fuel cells (PEMFCs), the changes in heat source temperature were categorized into two types: non-monotonic fluctuations and no fluctuation variations. Experiments analyzed the impact of these two types on performance. Specifically, for non-monotonic fluctuations within ±2.5 °C, ±3 °C, ±3.5 °C, and ±4 °C, it was found that fluctuations should be limited to ±3 °C to maintain optimal performance. In the three non-fluctuating cases examined (Mode 1: 70–76 °C, Mode 2: 70-73-76 °C, Mode 3: 70-72-74-76 °C), Mode 2 was identified as having the best control temperature, achieving a COP that is 4.6 % higher than Mode 1. |
|---|---|
| ISSN: | 2214-157X |