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Mohamed Lamine Yousfi; Mohamed Saighi; Antoine Dalibard; Dieter Schneider; Ursula Eicker. Performance of a 5 kW hot water driven diffusion absorption chiller. Applied Thermal Engineering 2017, 127, 789 -799.
AMA StyleMohamed Lamine Yousfi, Mohamed Saighi, Antoine Dalibard, Dieter Schneider, Ursula Eicker. Performance of a 5 kW hot water driven diffusion absorption chiller. Applied Thermal Engineering. 2017; 127 ():789-799.
Chicago/Turabian StyleMohamed Lamine Yousfi; Mohamed Saighi; Antoine Dalibard; Dieter Schneider; Ursula Eicker. 2017. "Performance of a 5 kW hot water driven diffusion absorption chiller." Applied Thermal Engineering 127, no. : 789-799.
Many installed solar thermally driven cooling systems suffer from high auxiliary electric energy consumption which makes them not more efficient than conventional compression cooling systems. A main reason for this is the use of non-efficient controls with constant set points that do not allow a chiller power modulation at partial-load and therefore lead to unnecessary high power consumption of the parasitics. The aims of this paper are to present a method to control efficiently solar thermally driven chillers, to demonstrate experimentally its applicability and to quantify the benefits. It has been shown that the cooling capacity of a diffusion absorption chiller can be modulated very effectively by adjusting both the temperature and the flow rate of the cooling water. With the developed approach and the use of optimization algorithms, both the temperature and the flow rate can be controlled simultaneously in a way that the cooling load is matched and the electricity consumption is minimized. Depending on the weather and operating conditions, electricity savings between 20% and 60% can be achieved compared to other tested control approaches. The highest savings are obtained when the chiller is operated at partial load. The presented method is not restricted to solar cooling systems and can also be applied to other conventional heating ventilation and air conditioning (HVAC) systems.
Antoine Dalibard; Daniel Gürlich; Dietrich Schneider; Ursula Eicker. Control Optimization of Solar Thermally Driven Chillers. Energies 2016, 9, 864 .
AMA StyleAntoine Dalibard, Daniel Gürlich, Dietrich Schneider, Ursula Eicker. Control Optimization of Solar Thermally Driven Chillers. Energies. 2016; 9 (11):864.
Chicago/Turabian StyleAntoine Dalibard; Daniel Gürlich; Dietrich Schneider; Ursula Eicker. 2016. "Control Optimization of Solar Thermally Driven Chillers." Energies 9, no. 11: 864.
On the basis of the Number of Transfer Units (NTU) method a functional relation between electric power for fans/pumps and effectiveness in dry coolers and wet cooling towers is developed. Based on this relation, a graphical presentation method of monitoring and simulation data of heat rejection units is introduced. The functional relation allows evaluating the thermodynamic performance of differently sized heat rejection units and comparing performance among them. The method is used to evaluate monitoring data of dry coolers of different solar cooling field projects. The novelty of this approach is that performance rating is not limited by a design point or standardized operating conditions of the heat exchanger, but is realizable under flexible conditions.
Hannes Fugmann; Björn Nienborg; Gregor Trommler; Antoine Dalibard; Lena Schnabel. Performance Evaluation of Air-Based Heat Rejection Systems. Energies 2015, 8, 714 -741.
AMA StyleHannes Fugmann, Björn Nienborg, Gregor Trommler, Antoine Dalibard, Lena Schnabel. Performance Evaluation of Air-Based Heat Rejection Systems. Energies. 2015; 8 (2):714-741.
Chicago/Turabian StyleHannes Fugmann; Björn Nienborg; Gregor Trommler; Antoine Dalibard; Lena Schnabel. 2015. "Performance Evaluation of Air-Based Heat Rejection Systems." Energies 8, no. 2: 714-741.
Antoine Dalibard; Ursula Eicker. Primary Energy Optimisation of a Solar Adsorption Cooling Plant Through Dynamic Simulations. Proceedings of the EuroSun 2010 Conference 2010, 1 -8.
AMA StyleAntoine Dalibard, Ursula Eicker. Primary Energy Optimisation of a Solar Adsorption Cooling Plant Through Dynamic Simulations. Proceedings of the EuroSun 2010 Conference. 2010; ():1-8.
Chicago/Turabian StyleAntoine Dalibard; Ursula Eicker. 2010. "Primary Energy Optimisation of a Solar Adsorption Cooling Plant Through Dynamic Simulations." Proceedings of the EuroSun 2010 Conference , no. : 1-8.