Simulation and Analysis of Small-Scale Solar Adsorption Cooling System for Cold Climate

Januševičius, Karolis; Streckienė, Giedrė; Misevičiūtė, Violeta

doi:10.7763/ijesd.2015.v6.561

Cited by 11 publications

(6 citation statements)

References 21 publications

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“…Studies have also been done for solar driven adsorption systems, which are similar to absorption systems but use a solid adsorbent instead of liquid absorbent, have shown similar performances and share similar operation and optimization issues due to solar thermal efficiency (Fan et al, 2007). Modelling of solar adsorption systems have also demonstrated a COP range of approximately 0.3 to 0.5, showing consistent performance for solar sorption technologies (Januševičius et al, 2015). These studies consistently found that part load performance reduced the thermal COP and systems must be sized more appropriately to avoid such cases.…”

Section: Different Ahp Configurationsmentioning

confidence: 93%

Energy modelling and field testing of natural gas absorption heat pump system in cold climate - Canada

Ethirveerasingham¹

2021

Preprint

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The feasibility of a Natural Gas Absorption Heat Pump (GAHP) was investigated through the use of a technology screening tool developed in Excel and TRNSYS simulations that used experimentally evaluated performance curves using 50% propylene glycol (PG)/water solution. The Excel tool was used for cost and greenhouse gas (GHG) reductions analysis and indicated that the GAHP was cost effective compared to an Air-Source Heat Pump (ASHP) in locations where the primary heating fuel was natural gas and had significantly lower GHG emissions compared to a 90% efficient natural gas furnace. During the heating season, it was found that the system only had more than 100% heating Gas Utilization Efficiency (GUE) at -1.5°C or above and would go as low at 66% GUE at nominal flow and return temperatures. Part load performance was analyzed using experimental data and implemented in a TRNSYS model. The TRNSYS model shows significant losses from part load performance and 50% PG/water derating for both heating and cooling season due to excessive cycling.

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Section: Different Ahp Configurationsmentioning

confidence: 93%

Energy modelling and field testing of natural gas absorption heat pump system in cold climate - Canada

Ethirveerasingham¹

2021

Preprint

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“…Type686 is the heating and cooling load generator component for the building synthetically. This component has been extensively used in previous studies [22][23][24] to save their time from tedious calculations. Type686 takes the input as peak load and gives hourly cooling load demand which is quite like real building load and also uses daily and seasonal variations in the load as shown in Figure 6.…”

Section: Building Load Generatormentioning

confidence: 99%

Effect of Modified Flow Schemes of Heat Transfer Fluid on the Performance of a Solar Absorption–Cooling System for an Educational Building in Pakistan

et al. 2020

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Performance of solar absorption cooling systems (SACS) is the focus of contemporary studies for decreasing the electrical energy consumption of buildings as the conventional cooling system of buildings is the main consumer of electrical energy during the summer season in hot–humid climates. In this study, the performance analysis of SACS by manipulating different flow schemes to the heat transfer fluid between different components of the system was performed. TRNSYS model of SACS in an education building located at the city of Peshawar (34.00 N, 71.54 E), Pakistan to encounter the peak cooling load of 108 kW (during operating hours of the building i.e., 09 a.m. to 05 p.m.) is developed and all possible flow schemes of heat transfer fluid between the system’s components were compared. In Scheme-1 (S-1), a conventional flow pattern is used in which the hot water exiting from the chiller unit flows directly toward the stratified thermal storage unit. In Scheme-2 (S-2), the modified flow pattern of hot water exiting from the chiller unit will divert towards the auxiliary unit, if its temperature exceeds the temperature at the hot side outlet of the tank. Another modified flow pattern is Scheme-3 (S-3) in which the hot water leaving the chiller to keep diverting towards the auxiliary unit unless the outlet temperature from the hotter side of the tank would reach the minimum driving temperature (109 °C) of the chiller’s operation. Simulations in TRNSYS evaluates the SACS’s performance of all the schemes (conventional and modified) for the whole summer season and for each month. In general, S-3 with evacuated tube solar collector results in better primary energy saving with the smallest collector area per kilowatt for achieving 50% primary energy saving for the whole summer season.

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“…TRNSYS is a transient system simulation program with a modular structure that was designed to solve complex energy systems problems by breaking the problem down into a series of smaller components known as "types" [20,21]. It is one of the most reliable modeling and simulation programs oriented to deal with complicated energy systems [22].…”

Section: Simulation Model Using Trnsysmentioning

confidence: 99%

Wind Energy Potential of Gaza Using Small Wind Turbines: A Feasibility Study

2017

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Abstract:In this paper, we conduct a feasibility study of the wind energy potential in Gaza, which suffers from a severe shortage of energy supplies. Our calculated energy harvested from the wind is based on data for a typical meteorological year, which are fed into a small wind turbine of 5 kW power rating installable on the roof of residential buildings. The expected annual energy output at a height of 10 m amounts to 2695 kWh, but it can be increased by 35-125% at higher altitudes between 20 m and 70 m. The results also depict the great potential of wind energy to complement other renewable resources such as solar energy: the harvested energy of a wind system constitutes to up to 84% of the annual output of an equivalent power rating photovoltaic system and even outperforms the solar energy in the winter months. We also show that one wind turbine and one comparable photovoltaic system together could provide enough energy for 3.7 households. Hence, a combination of wind and solar energy could stabilize the decentralized energy production in Gaza. This is very important in a region where people seek to reach energy self-sufficient buildings due to the severe electricity shortage in the local grid.

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Simulation and Analysis of Small-Scale Solar Adsorption Cooling System for Cold Climate

Cited by 11 publications

References 21 publications

Energy modelling and field testing of natural gas absorption heat pump system in cold climate - Canada

Energy modelling and field testing of natural gas absorption heat pump system in cold climate - Canada

Effect of Modified Flow Schemes of Heat Transfer Fluid on the Performance of a Solar Absorption–Cooling System for an Educational Building in Pakistan

Wind Energy Potential of Gaza Using Small Wind Turbines: A Feasibility Study

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