Development of a 5 kW Cooling Capacity Ammonia-water Absorption Chiller for Solar Cooling Applications

International audienceOrganic Rankine cycles (ORC) are used to convert lowgrade heat sources into power. Current research and development investigate small scale and variable heat sources application such as waste heat recovery. Many experimental data on ORC are available. Feed-pump performances achieved are lower than expected and some authors reported cavitation issue. Pump performance has a non-negligible impact over the ORC performance, especially for transcritical cycles. Operations of diaphragm pumps in three different test benches with different fluid and pump size are analyzed. A semi-empirical model of the pump power chain is proposed and validated. Energetic analysis show highlevel of losses in the variable speed drive and electric motor, mainly due to design oversizing. Then a model and analysis of reciprocating pump volumetric efficiency is proposed, taking into account fluid properties. Finally, cavitation limits in different conditions are calculated. Required Net Positive Suction Head (NPSHr) calculated for R134a are found to be in accordance with manufacturer limits for water. Pump vibration sensor could be used for cavitation monitoring. This work gives information for ORC feed-pump simulation, design and operation

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“…4 shows Surcouf bench diagram and installation. Details about the CPV/ Rankine and Solammor bench can be found respectively in [14,15].…”

Section: Experimental Setupsmentioning

confidence: 99%

Performance investigation of reciprocating pump running with organic fluid for organic Rankine cycle

Landelle

Tauveron

Revellin

et al. 2017

Applied Thermal Engineering

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“…The French National Institute for Solar Energy developed a 4.2 kW prototype watereammonia absorption chiller operating at 80, 27 and 18 C temperatures for the generator, absorber/condenser and evaporator, respectively. It achieved a COP of 0.65 [7].…”

Section: Introductionmentioning

confidence: 98%

“…Recently, some companies have taken initiatives to improve absorption chillers in the power range from 50 kW down to 5 kW [27]. But very few chillers are available for small scale cooling applications and they are not optimized for solar thermal power applications [7]. According to the International Energy Agency, small-scale system design requires R&D effort in order to develop low-cost systems, integrate them with existing equipment and optimize operation in new developments [29].…”

Section: Introductionmentioning

confidence: 99%

Residential solar air conditioning: Energy and exergy analyses of an ammonia–water absorption cooling system

Aman

Ting

Henshaw

2014

Applied Thermal Engineering

129

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“…Recently, Boudéhenn et al [59] developed a 5 kW solar powered NH 3 /H 2 O absorption chiller. They constructed the chiller components using the industrially available brazed plate heat exchangers using 0.735 kg of water and 2.4 kg of ammonia.…”

Section: Single-effect Solar Absorption Cyclementioning

confidence: 99%

General review of solar-powered closed sorption refrigeration systems

Sârbu

Sebarchievici

2015

Energy Conversion and Management

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Development of a 5 kW Cooling Capacity Ammonia-water Absorption Chiller for Solar Cooling Applications

Cited by 44 publications

References 5 publications

Performance investigation of reciprocating pump running with organic fluid for organic Rankine cycle

Performance investigation of reciprocating pump running with organic fluid for organic Rankine cycle

Residential solar air conditioning: Energy and exergy analyses of an ammonia–water absorption cooling system

General review of solar-powered closed sorption refrigeration systems

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