Performance of absorption chillers in field tests

Güido, Walther Hüls; Lanser, Wolfgang; Petersen, Stefan; Ziegler, Felix

doi:10.1016/j.applthermaleng.2018.02.013

Cited by 19 publications

(8 citation statements)

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“…Systems with activated carbon/methanol have also been evaluated, but the COP and the T Gen increase with respect to silica gel/water [16,[146][147][148][149]. In comparison, ABS equipment has a COP between 0.7-1.8 and a T Gen between 80-220 • C [13,109,150,151]. Before crystallization, using LiBr/H 2 O as working fluid, the evaporator temperature is 5 • C, while using NH 3 /H 2 O as working fluid, the system can reach temperatures as low as −5 • C [152][153][154][155][156][157][158].…”

Section: Ref Technologymentioning

confidence: 99%

“…Previous reviews regarding solar thermal cooling technologies have focused on the operating principles, working temperatures and equations of state of the adsorption [10][11][12][13], absorption [14][15][16], and thermomechanical [17,18] machines. In addition, the technical limits of the operational aspects and the conversion efficiency were detailed [11,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

et al. 2021

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The trend to reduce CO2 emissions in cooling processes has made it possible to increase the alternatives for integrating solar energy with thermal equipment whose viability depends on its adaptation to polygeneration schemes. Despite the enormous potential offered by the industry for cooling and heating processes, solar cooling technologies (SCT) have been explored in a limited way in the industrial sector. This work discusses the potential applications of industrial SCTs and classifies hybrid polygeneration schemes based on supplying cold, heat, electricity, and desalination of water; summarizes the leading SCTs, and details the main indicators of polygeneration configurations in terms of reductions on primary energy consumption and payback times. To achieve an energy transition in refrigeration processes, the scenarios with the most significant potential are: the food manufacturing industry (water immersion and crystallization processes), the beverage industry (fermentation and storage processes), and the mining industry (underground air conditioning).

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Section: Ref Technologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

et al. 2021

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“…The mass flow rate of the primary flow through the nozzle is determined by Equation (5) [32] considering chocked conditions at the nozzle throat, where R represents the specific gas constant, A t is the nozzle throat cross section, k is the heat capacity ratio, and η N is the nozzle efficiency defined previously. Once the primary flow rate is known, the nozzle throat section can be evaluated by using Equation (5).…”

Section: Ejector Modelmentioning

confidence: 99%

Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source

et al. 2020

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The rising of the global energy demand requires the use of alternative energy conversion systems employing renewable sources. In the refrigeration and air conditioning fields, heat driven ejector systems represent a promising way to produce the cooling effect by using available low-grade temperature sources. In this paper, a thermo-economic analysis of a waste heat recovery hybrid ejector cycle (WHRHEC) was carried out. A thermodynamic model was firstly developed to simulate a WHRHEC able to obtain chilled water with a cooling load of 20 kW, by varying the working fluids and the pinch point values in the heat exchangers. Specific single- and two-phase heat transfer correlations were used to estimate the heat transfer surface and therefore the investment costs. The operative ranges that provide a reasonable compromise between the set-up costs and the cycle performances were then defined and compared to the current waste heat-driven technologies, such as absorption chillers and organic Rankine cycles (ORCs) coupled with vapor compression cycles (VCCs). The last part of the paper presents an economic analysis providing the map of the design (plant size) and contingent (specific cost of energy, waste heat availability) variables that lead to the economic convenience of a WHRHEC system when integrated to a conventional VCC plant.

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“…A new generation of water/LiBr absorption heat pumps, new-AHP, driven by low-temperature heat, was designed and developed by the Technical University of Berlin (TU Berlin) in collaboration with Vattenfall Europe and ZAE Bayern [13,14,24,25]. The development of this type of new-AHP technology started in 2008 with the optimization of various aspects (including thermodynamic design, cost effectiveness, and manufacturing process) and case studies which were followed by various field tests carried out between 2012 and 2017.…”

Section: Efficient and Compact Absorption Heat Pump: Cooling And Heatingmentioning

confidence: 99%

New Developments and Progress in Absorption Chillers for Solar Cooling Applications

Ayou

Coronas

2020

Applied Sciences

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At present, novel, small-to-large capacity absorption chillers with unique technical features have emerged on the global market, and laboratory and pre-industrial prototypes have also been developed. These chillers have been designed for the efficient use of low-grade heat sources; some are air-cooled, small capacity systems; compact water/LiBr chillers; or solar-gas-fired single/double-effect chillers. Also, some advanced commercial absorption chillers have an extensive temperature glide in the driving heat stream (>30 K) which extracts approximately twice as much heat (~200%) as the single-effect chiller. This large temperature glide means that the chillers are well suited to solar thermal collector installations and district heating networks, and the extra driving heat increases cold production. Moreover, recent advances in R718 turbo compressor technologies have helped to solve the problems water/LiBr absorption chillers have in adapting to extreme operating conditions (e.g., high ambient temperature, >35 °C) by using a compressor-boosted absorption chiller configuration. This review paper presents and discusses the developments and progress in these absorption chiller technologies. In summary, the new absorption chillers may be useful for developing efficient, cost-effective, and robust solar cooling solutions that are needed to mitigate the unsustainable impact of the rising global demand for space cooling.

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Performance of absorption chillers in field tests

Cited by 19 publications

References 1 publication

Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source

New Developments and Progress in Absorption Chillers for Solar Cooling Applications

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