Configuration based modeling and performance analysis of single effect solar absorption cooling system in TRNSYS

Khan, Muhammad Shoaib Ahmed; Badar, Abdul Waheed; Talha, Tariq; Khan, Muhammad Wajahat; Butt, Fahad Sarfraz

doi:10.1016/j.enconman.2017.12.024

Cited by 84 publications

(34 citation statements)

References 21 publications

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“…The properties and working conditions supplied were a heat capacity of 2.24 kJ/kg K for the heating fluid, an initial temperature of 70°C, and a loss coefficient = 0.75W/m 2 K. The characteristics of the thermal insulation are density = 16 kg/m 3 , thickness = 0.05 m, and thermal conductivity = 0.05 W/m K. The air conditioning systems used are available in the TRNSYS standard library. This catalog-based component with its own external file predicts the performance of the chiller based on the available range of input data [7]. The file provides values of normalized capacity and COP values as a function of inlet hot water, inlet cooling water, and inlet chilled water temperature.…”

Section: Basic Equationsmentioning

confidence: 99%

Thermal Analysis of an Absorption and Adsorption Cooling Chillers Using a Modulating Tempering Valve

Cerezo¹,

Dominguez²,

Martínez³

et al. 2019

Zero and Net Zero Energy

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The energy consumption for space cooling is growing faster than for any other end use in buildings, more than tripling between 1990 and 2016. The efficient use of energy is important to reduce the consumption of electricity of conventional air conditioning. This chapter presents a thermal analysis of absorption and adsorption chillers for conditioning the airspace in a building, controlling the hot maximum temperature at the generator input with a modulating tempering valve (MTV) programmed in TRNSYS and Excel software. The energy performance of the system was maximized based on the tilt of the solar collector, storage tank specific volume, and input generator temperature. The results showed that 35 and 27 l/m 2 of specific volume is a good choice for absorption and adsorption chiller without MTV, and 23 and 22 l/m 2 were selected absorption and absorption chillers using the MTV at a fixed tilt angle of 7° of the solar collector and selecting a minimum temperature at the generator input of 111 and 109°C for absorption chiller without and with MTV, respectively, and 75°C for adsorption chiller without and with MTV. The use of MTV represented a significant reduction of the heater energy for both chillers, mainly for absorption chiller.

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Section: Basic Equationsmentioning

confidence: 99%

Thermal Analysis of an Absorption and Adsorption Cooling Chillers Using a Modulating Tempering Valve

Cerezo¹,

Dominguez²,

Martínez³

et al. 2019

Zero and Net Zero Energy

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show abstract

“…To access the performance prediction of the SHC system over long periods of time, simulation method based on equation solver is quite extensively used [43]. Therefore, mathematical models are required.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling and performance analysis of an integrated solar heating and cooling system driven by parabolic trough collector and double-effect absorption chiller

Zheng

Shi

Wang

et al. 2019

Energy and Buildings

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With the increasing concerns on energy conservation and environmental protection, solar heating and cooling (SHC) system represents an attractive candidate in building sector. In this paper, an integrated SHC system driven by parabolic trough collector (PTC) and double-effect H2O/LiBr absorption chiller was presented. The energy generated by solar collectors was supplied to the absorption chiller during the cooling period, and was directly used for space heating with the integration of plate heat exchanger during the heating period. The mathematical models of the whole system 2 including the collector, the double-effect absorption chiller and the plate heat exchanger were established and were validated by field tests. Based on the proposed models, comparison of the SHC system and the conventional gas-driven absorption heating and cooling system was carried out by case study. The annual performances as well as energetic, economic and environmental assessments of the proposed system were investigated. Results show that, 21.3% of the primary energy consumption and 18.8% of the CO2 emission can be reduced in SHC system. Therefore, the proposed integrated solar heating and cooling system has a promising application prospect in sustainable development in view of its considerable energy saving benefits, potential economic viability and environmental friendly characteristics.

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“…The emissions of CO 2 , which grows with the production of energy from fossil fuels and the use of climate-altering cooling working fluids. The aim of many studies on SC system is to improve the useful energy gain form collector and reduce the auxiliary energy and other parasitic energy losses from electrical devices [1][2][3][4]. A way to improve the heat transfer of conventional fluids is to suspend in them small solid metallic, non-metallic or polymeric nanoparticles [5].…”

Section: Introductionmentioning

confidence: 99%

Application of nanofluids in solar cooling system: Dynamic simulation by means of TRNSYS software

Buonomo¹,

Cascetta²,

Cirillo³

et al. 2018

MMC_B

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Convective heat transfer can be enhanced passively by using fluids with high value of the thermal conductivity. An innovative method of enhancement of thermal conductivity of base fluids is to insert nanoparticles. In recent years, nanofluids and their possible applications have been extensively studied. In this study, simulation based on a performance analysis of a solar cooling system is carried out by means of TRNSYS. First the analysis determines the peak energy demand for a building located in Naples. Beside, for the same configuration of solar system both pure water and Al2O3/water based nanofluids are considered as working fluids. Different values of volume nanoparticles concentrations, equal to 3%, and 6%, are investigated. The configuration is fully modelled in TRNSYS and dynamic simulations are run for the entire year. Various performance factors such as useful energy gain from collector, solar fraction, primary energy savings and pumping consumption are evaluated. Simulations results demonstrate that for the whole summer season, using nanofluids as working fluid, always higher primary energy savings results. Besides, solar fraction, difference between nanofluids with nanoparticles concentration of 3% and 6% is estimated to be marginal. In terms of PEC and primary energy savings, nanofluids with nanoparticles concentration of 6% has presented higher values.

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Configuration based modeling and performance analysis of single effect solar absorption cooling system in TRNSYS

Cited by 84 publications

References 21 publications

Thermal Analysis of an Absorption and Adsorption Cooling Chillers Using a Modulating Tempering Valve

Thermal Analysis of an Absorption and Adsorption Cooling Chillers Using a Modulating Tempering Valve

Mathematical modeling and performance analysis of an integrated solar heating and cooling system driven by parabolic trough collector and double-effect absorption chiller

Application of nanofluids in solar cooling system: Dynamic simulation by means of TRNSYS software

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