Wu, Z;
You, S;
Zhang, H;
Wang, Y;
Jiang, Y;
Liu, Z;
Sha, L;
(2021)
Experimental investigations and multi-objective optimization of an air-source absorption heat pump for residential district heating.
Energy Conversion and Management
, 240
, Article 114267. 10.1016/j.enconman.2021.114267.
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Abstract
The traditional single-effect absorption heat pump is an effective district heating measure, while the low ambient temperature will degrade its performance significantly. To overcome this dilemma, a novel air-source absorption heat pump (ASAHP) for district heating (DH) is proposed in this paper. This system can operate at low ambient temperature and recover the waste heat of the flue gas with higher efficiency compared with the conventional gas-fired boilers. The falling film form is adopted in the generator and absorber, which reduces the system mass flow rate and electricity consumption. The thermodynamic performance of the system is analyzed by the lumped parameter model. An experimental rig is established to study the system performance and validate the mathematical model. Results show that the proposed system is an efficient way for DH, especially in cold regions. The heating capacity and the COP of the system are 38.32 kW and 1.39 at the evaporation temperature of −10 °C, respectively. The system can provide 36.21 kW heating capacity and 39.21 kW heating capacityfg (heating capacity of the system with flue gas recovery) with flue gas recovery to heat water from 25 °C to 39.1 °C with the COP of 1.21 and COP_{fg} (COP of the system with flue gas recovery) with flue gas recovery of 1.36. The maximum ratio of COP_{fg} ith flue gas recovery to simulation value and the maximum ratio of heating capacityfg with flue gas recovery to simulation value are 92.91% and 92.23%, respectively. Additionally, to obtain the optimal operating condition, the TOPSIS decision-making method and NSGA-II technology is adopted in multi-objective optimization.
| Type: | Article |
|---|---|
| Title: | Experimental investigations and multi-objective optimization of an air-source absorption heat pump for residential district heating |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.enconman.2021.114267 |
| Publisher version: | https://doi.org/10.1016/j.enconman.2021.114267 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Experiment study, Mathematical model, Absorption heat pump, System optimization |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10129524 |
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