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Accueil du site → Master → Arabie Saoudite → PERFORMANCE AND COST ANALYSES OF AN INTEGRATED SYSTEM OF M-CYCLE-BASED COOLING AND ABLUTION GREYWATER TREATMENT FOR MOSQUES IN HOT AND DRY CLIMATIC ZONES.

King Fahd University of Petroleum and Minerals. (KFUPM) 2022

PERFORMANCE AND COST ANALYSES OF AN INTEGRATED SYSTEM OF M-CYCLE-BASED COOLING AND ABLUTION GREYWATER TREATMENT FOR MOSQUES IN HOT AND DRY CLIMATIC ZONES.

FAISAL ALMUTAIRI

Titre : PERFORMANCE AND COST ANALYSES OF AN INTEGRATED SYSTEM OF M-CYCLE-BASED COOLING AND ABLUTION GREYWATER TREATMENT FOR MOSQUES IN HOT AND DRY CLIMATIC ZONES.

Auteur : FAISAL ALMUTAIRI

Université de soutenance : King Fahd University of Petroleum and Minerals. (KFUPM)

Grade : Master Thesis 2020

Résumé
One of the most unique building types in Muslim communities are mosques where a substantial amount of waste ablution water with a low pollutant level is generated and a large amount of energy is consumed for cooling. There are 101,108 mosques in Saudi Arabia where Muslims perform their prayers five times a day. The energy use of mosques is within the 16.2% average energy consumed by government buildings in the Kingdom, which accounts for a total electricity bill of 700 million Riyals annually and an average estimated waste ablution water of 40 L/h. Riyadh city represents 17.4% of the total number of mosques in Saudi Arabia and it is classified as hot and dry climate zone. Accordingly, mosques located in Riyadh totally rely on HVAC systems to provide acceptable thermal comfort for the occupants. Thus, this study proposes an integrated ablution greywater treatment and M-cycle based cooling system for mosques located in such climatic zone. The study recommends to redesign the ablution and toilet areas in mosques to separate and treat the ablution greywater to be used in mosque cooling. A theoretical model was developed to predict the performance of the proposed cooling system using a variation of the Newton’s method. The developed model was tested and validated with an experimental data available in the literature and the results show good agreement with an overall error of 3.3%. The relative error is due to several factors, including but not limited to the non-uniform flow of air in the wet channel and the uneven water distribution in the wet channel. The performance of the proposed system was also investigated and the result shows that the average monthly supplied air temperature ranges from 13.8 to 19.89 °C and the relative humidity ranges from 51% to 72%. Moreover, a wet-bulb effectiveness greater than unity will be achieved with a channel length greater than about 1.2 m .Furthermore, the working air to supply air ratio must be within the range of 0.30 to 0.63, as the efficiency and cooling effectiveness of the system will be affected by higher values. Additionally, the effectiveness of the system decreases significantly as the inlet velocity increases. Based on the technical and economic analysis of the potential grey water treatment system , filtration and activated carbon adsorption (FA) based treatment system is the most feasible option to be utilized in the proposed integrated system with a total annualized estimated cost of 0.00085 $/L. The economic analysis shows that the capital cost of the conventional cooling system is 54.2% less than the capital cost of M-cycle-based cooling system. On the other hand, M-cycle-based cooling system consumes 88% less electricity than that consumed by a conventional cooling system and consequently the payback period of the proposed system is about 18 months

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Page publiée le 17 mars 2022