TRNSYS Simulation of a Solar Cooling System for the Hot Climate of Pakistan

Asim, Muhammad; Dewsbury, Jonathan; Kanan, Safwan

doi:10.1016/j.egypro.2016.06.233

Cited by 38 publications

(14 citation statements)

References 6 publications

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“…Assim et al [10] modeled an absorption chiller operated by hot water using an evacuated tube collector in TRNSYS software. It was found that the use of a hot water storage tank and a 12 m 2 collector area were sufficient to maintain the room temperature at 26 • C or below during the cooling season.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Simulation of an Absorption Cooling System with Different Working Mixtures

et al. 2018

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High consumption of electricity represents an economic and social problem in warm places, caused by the massive use of cooling machines. Absorption systems are a sustainable method for air conditioning applications. However, environmental conditions should be analyzed to avoid crystallization problems of the working mixture. This article presents a thermal analysis of a solar absorption cooling system in dynamic conditions using NH 3 -H 2 O, H 2 O-LiBr, NH 3 -NaSCN, NH 3 -LiNO 3 , and H 2 O-LiCl working mixtures using Equation Engineering Solver (EES) and TRaNsient SYstem Simulation (TRNSYS) software. A solar collector area of 42.5 m 2 was selected to carry out the thermal analysis. The results showed that H 2 O-LiCl obtained the maximum solar (0.67) and minimum heating (0.33) fraction. However, it obtained the maximum lost heat fraction (0.12), in spite of obtaining the best coefficient of performance (COP) among the other working mixtures, due mainly to a crystallization problem. The gain fraction (GF) parameter was used to select the adequate solar collector number for each working mixture. NH 3 -LiNO 3 and NH 3 -H 2 O obtained the highest GF (up 6), and both obtained the maximum solar (0.91) and minimum heating (0.09) fraction, respectively, using 88.8 and 100.4 m 2 of solar collector area, respectively.

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Section: Introductionmentioning

confidence: 99%

Dynamic Simulation of an Absorption Cooling System with Different Working Mixtures

et al. 2018

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“…A transient simulation model is developed using Transient Systems Simulation (TRNSYS) software, employing Typical Meteorological Year (TMY) weather data for Abu Dhabi to predict energy performance for the proposed renewable energy systems [31]. TRNSYS simulation program has been widely used in literature, and has been proven as an effective program for simulating geothermal systems [32][33][34], absorption cooling [35][36][37] and photovoltaic systems [38][39][40]. A dynamic model that couples the solar cooling system with the building was developed in TRNSYS to assess its performance in an office building in Tunisia [41].…”

Section: Methodsmentioning

confidence: 99%

Enhancing Green Building Rating of a School under the Hot Climate of UAE; Renewable Energy Application and System Integration

2018

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Similar to many fast growing countries, the United Arab Emirates (UAE) witnessed fast population and urbanization growth. The building sector accounts for a major share of its electricity consumption, reaching up to 70%. To encourage sustainable development and reduce energy consumption and emissions, the government introduced a sustainability initiative called “Estidama”, which employs the use of the Pearl Building Rating System (PBRS). Government buildings, which constitute 20% of the built environment, aim to lead the way, and are therefore required to attain a high level of achievement, based on their PBRS ranking (minimum of two out of five pearls). Schools, led by Abu Dhabi Educational Council (ADEC), are governmental buildings and aim to attain a higher level of achievement (three out of five pearls). The ADEC plans to build one hundred schools to be built by 2020, through its Future Schools Program. Over half of the schools have been completed, but only 20% reached the targeted rating (of three out of five pearls). The Renewable Energy (RE) application in the UAE is minimal, although it represents 25% of the local rating code. The objective of this paper is to explore the sustainable performance of one representative school that did not reach the desired green rating level, with the objective to assess opportunities for an enhanced performance. This is done through testing the performance and the application of three RE systems comprising of photovoltaics (PV) array, an absorption cooling system and a geothermal cooling system through Transient Systems Simulation (TRNSYS) software. Cumulatively, implementation of these options results in RE potentially contributing to 19% of the school’s annual energy consumption, enhancing the school’s performance by up to 14 additional credit points, and reaching the target level of achievement (a three pearl rating). Furthermore, system integration of RE into the existing school were also considered. Results indicate the significant potential of integrating RE systems in future schools in hot climatic contexts, for an improved energy performance.

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“…Both of the aforementioned research were simulated in TRNSYS software. In addition, Ahmed et al [19], and Asim et al [20] used TRNSYS to simulate the absorption cooling system under climate of Egypt and Pakistan respectively. This research aims to to use the TRNSYS software to simulate the VJRC under two different locations in Palestine; one in Hebron city which has a moderate weather and the second in Jericho city which has a very hot weather in summer.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Vapor Jet Refrigeration Cycle Driven by Solar Thermal Energy for Air Conditioning Applications: Case Study

Sider¹,

Sider²

2020

Adv. sci. technol. eng. syst. j.

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The need for air conditioning in rural areas where there is no source of electricity, leads to look for alternative solutions. Usage of Solar thermal system drive vapor jet refrigeration cycle (VJRC) instead of the traditional air conditioning systems, contributes in the reduction of the Global Worming and Ozone Depletion. The main objective of this paper is to test the visibility of using VJRC driven by solar thermal energy in rural areas to cover the cooling load demand of a typical movable house unit (TMH). After the mathematical modeling of the VJRC, the characteristic curves and tables where obtained by using engineering equation solver (EES) software assuming a constant evaporator temperature and various generator and condenser temperatures. TRNBuild subsystem in TRNSYS software was used to emulate TMH cooling load demand using weather data for two selected locations (Hebron and Jericho cities). TRNSYS software was used to investigate the validity of the proposed system in summer (May to September) for the two suggested locations. Three main parameters were studied in the proposed system, location, evacuated tube solar collector (ETC) area and hot storage tank volume. The results of the overall simulation of the proposed system indicated that the system efficiency in Hebron city was much higher than Jericho city due to climate and design conditions. In addition, it is found that there were many options for the system size can be selected to provide a percentage of the human comfort.

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TRNSYS Simulation of a Solar Cooling System for the Hot Climate of Pakistan

Cited by 38 publications

References 6 publications

Dynamic Simulation of an Absorption Cooling System with Different Working Mixtures

Dynamic Simulation of an Absorption Cooling System with Different Working Mixtures

Enhancing Green Building Rating of a School under the Hot Climate of UAE; Renewable Energy Application and System Integration

Evaluation of Vapor Jet Refrigeration Cycle Driven by Solar Thermal Energy for Air Conditioning Applications: Case Study

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