Study of Aerodynamic Performance and Power Output for Residential-Scale Wind Turbines

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Energy audits can identify energy consumptions, energy costs of the facility and evolve to develop measures to maximize efficiency, optimize supply energy, and eliminate waste. This paper investigates the potential energy savings at 20 different industrial sectors with 152 assessments for various facilities in USA. On average, 8 energy recommendations were suggested and applied in each facility. This paper provides a detailed guideline for each industry in terms of eight different energy categories; Heating, Ventilation, and Air Conditioning (HVAC) systems, heat recovery systems, electrical demand management, and utility bills, motors, compressors, waste management, and productivity enhancement, lighting, besides building envelope. In total, the energy savings were as follows, 98 million kWh in the shape of electricity, 561 billion British Thermal Units (BTUs) gas savings, 44 million gallons water savings, and 2-million-pound solid waste savings. Based on these savings, a 100-thousand-ton reduction in carbon dioxide emissions was obtained.

Section: Introductionmentioning

confidence: 99%

Analysis of Energy Savings and CO2 Emission Reduction Contribution for Industrial Facilities in USA

Selim

Abousabae

Hasan

et al. 2020

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Computational Analysis of an Optimized Curved-Bladed Small-Scale Horizontal Axis Wind Turbine

Abdelsalam

El‐Askary

Kotb

et al. 2020

This article aims to study numerically the effect of curvature of linear blade profile on the performance of Small-Scale Horizontal Axis Wind Turbine (SSHAWT). Rotors with two curvature types, of forward angles 5°, 10°, 15°, 20°, 30° and 45° and backward angles −5°, −10° and −15° are investigated. Further, three curvature positions of r/R=0.8, 0.9 and 0.95 are studied. The numerical simulations are performed on rotors of radius 0.5 m at different wind speeds. The results are compared with straight rotor of linear profiles of chord and twist, which is considered as base rotor. It is found that the rotor with forward curvature of 5 degrees and r/R = 0.9 has the highest power coefficient compared with the other rotors. At the peak performance, the proposed rotor reduces the axial thrust by about 12.5 % compared with the base rotor. The flow behavior represented by the streamlines contours is also discussed. In such case, the separation approximately disappeared for tip speed ratios of 5 and 6, which is responsible for the performance peak.

The Power Reclamation of Utilizing Micro-Hydro Turbines in the Aeration Basins of Wastewater Treatment Plants

Hasan

Salem

Hadi

et al. 2020

Upgrading the aeration basin technology can improve the oxygen transfer efficiency (OTE) while keeping the energy consumption at its minimum level. Therefore, this paper introduces a new idea of installing micro propeller turbines in the aeration basin of a wastewater treatment plant (WWTP) to extract power from the high-velocity location in the water column. This extracted power can be used to operate a mixer at the top of the membrane to induce the mixing in that region, which will drive the less oxygenated wastewater into the water column. The rest of the extracted power will rotate microturbine rotors for electric power generation. By applying the proposed microturbines to the thirteen audited facilities, it was demonstrated to achieve a gross annual energy savings of 3,836,880 kWh, a gross yearly cost saving of $260,497, and total CO2 emissions that would be reduced of 2,714 metric tons/year. Generally, the addition of the proposed microturbines can save up to 15.7% of the annual plant electricity consumption (1.3% to 12.8% of the plant annual electricity bills).