scholarly journals An occupancy-based strategy employing computer vision for reducing cooling energy consumed in buildings

2021 ◽  
Vol 10 (3) ◽  
pp. 1729-1738
Author(s):  
Rania Atef Mohamed AlQadi ◽  
Alaa Zaghloul ◽  
Shereen Aly Taie
Keyword(s):  
Energy Consumption ◽  
Detection Algorithm ◽  
Human Detection ◽  
Air Conditioner ◽  
Air Conditioners ◽  
Proposed Model ◽  
Innovative Model ◽  
Detection Enhancement ◽  
Processing Algorithms ◽  
Two Phases

The energy expended to cool the occupied areas by air conditioners represents a substantial share of the total energy exhausted in buildings. Therefore, developing strategies to reduce this energy is crucial. One of the preponderance strategies adopted to depreciate energy consumption in buildings is the occupancy-based strategy. In this research, an innovative model was established to achieve the goal of reducing cooling energy consumed in buildings based on occupancy-based combined with a constant temperature setpoint strategy in two phases, and each phase engrosses in 20 days. Phase one is to identify the extent of cooling energy employed according to the use of room occupants and its costs in consumption was 276.01 kWh after completion of this phase. Sequentially, constructing phase two intended to reduce cooling energy consumption by employing an automatic air-conditioner (AC) control strategy relying on an improved human detection algorithm with a 25℃ as temperature setpoint, resulting in 112.45 kWh of consumption. To complement the motives for elaboration, the human detection measurement using you only look once (YOLO) improved by applying pre-processing algorithms to reach an average human detection enhancement of 21.2%. The proposed model results showed that potential savings associated with the embraced strategy decreases by more than anticipated as the amount of reduced energy reached 59% savings.

scholarly journals KINERJA TERMAL SELUBUNG GEDUNG KULIAH KOTA BANDAR LAMPUNG ITERA

2019 ◽  
Vol 3 (3) ◽  
pp. 267
Author(s):  
Andi Asrul Sani ◽  
Adelia Enjelina Matondang ◽  
Guruh Kristiadi Kurniawan ◽  
Anggi Mardiyanto
Keyword(s):  
Heat Transfer ◽  
Energy Consumption ◽  
Building Energy ◽  
Air Conditioner ◽  
Tropical Country ◽  
Air Conditioners ◽  
Natural Lighting ◽  
Thermal Transfer ◽  
Institute Of Technology ◽  
Window Area

Abstract: The use of glass material should consider the comfort of space in the building. Field of glass is needed as natural lighting and visual facilities between the occupants and the surrounding environment. Its function as natural lighting is often accompanied by an increase in temperature in buildings, considering that Indonesia is a tropical country. Building temperatures that increase due to incoming sunlight can cause discomfort to building occupants. Such conditions make building occupants use air conditioner (AC). The use of air conditioners can increase the value of building energy consumption. For this reason, research on the value of heat transfer in buildings or the value of OTTV (Overall Thermal Transfer Value). OTTV value calculation is done by manual calculation. Bandar Lampung City lecture building at the Sumatra Institute of Technology was chosen as the object of this study. From the results of the study found that the value of heat transfer of a building or OTTV (Overall Thermal Transfer Value) is influenced by the factor of the ratio of the window area to the facade or WWR (Window Wall Ratio) and the shading factor (Shading Coefficient).(Keywords: Keyword: energy consumption, building energy, glass. Abstract: Penggunaan material kaca semestinya mempertimbangkan kenyamanan ruang dalam bangunan. Bidang kaca diperlukan sebagai pencahayaan alami dan sarana visual antara penghuni dan lingkungan sekitar. Fungsinya sebagai pencahayaan alami seringkali disertai dengan peningkatan temperatur pada bangunan, mengingat Indonesia merupakan negara yang beriklim tropis. Temperatur bangunan yang meningkat akibat dari radiasi sinar matahari yang masuk dapat menyebabkan ketidaknyamanan bagi penghuni bangunan. Kondisi seperti itu membuat penghuni bangunan menggunakan air conditioner (AC). Penggunaan air conditioner tersebut dapat meningkatkan nilai konsumsi energi bangunan. Untuk  itu dilakukan penelitian mengenai nilai perpindahan panas dalam bangunan atau nilai OTTV (Overall Thermal Transfer Value). Penghitungan nilai OTTV dilakukan dengan penghitungan manual. Gedung kuliah Kota Bandar Lampung di Institut Teknologi Sumatera di pilih sebagai objek dalam penelitian ini. Dari hasil penelitian ditemukan bahwa nilai perpindahan panas suatu bangunan atau OTTV (Overall Thermal Transfer Value) dipengaruhi oleh faktor nilai perbandingan luas jendela terhadap bidang fasad atau WWR (Window Wall Ratio) dan faktor pembayangan (Shading Coefficient).Kata kunci : konsumsi energi, energi bangunan, kaca.

scholarly journals Study on energy loss and thermal environment through door open while air conditioner running

2019 ◽  
Vol 111 ◽  
pp. 06035
Author(s):  
Sihwan Lee
Keyword(s):  
Energy Consumption ◽  
Indoor Air ◽  
Room Temperature ◽  
Thermal Environment ◽  
Infiltration Rate ◽  
Operating Efficiency ◽  
Air Conditioner ◽  
Air Conditioners ◽  
Cooling Period ◽  
Closed State

While air conditioner is running, opening doors and windows is a great way to reduce operating efficiency and undermine the air conditioning system’s ability to bring the indoor to a comfortable temperature. The purpose of this study is to evaluate the heat loss and thermal environment through the door open while air conditioner running. To achieve this goal, using full-scale measurement with the commercial store during the cooling period, the infiltration rate, thermal environment and energy consumption of air conditioners with door opened and door closed state were measured. The measured results show that the infiltration rate at the door opened state was increased by about 21.3 times compared to the door closed state. When the set temperature of the air conditioner was 24 °C, the room temperature in the opening gate cooling was measured to be about 5 °C higher than the closing gate cooling. However, the energy consumption was measured approximately 12 kWh/day and there was no difference with door state. This means that the energy consumption is not increased if the indoor air temperature would not reach the set point temperature of air conditioner.

scholarly journals Comparison of energy consumption between non-inverter and inverter-type air conditioner in Saudi Arabia

2020 ◽  
Author(s):  
Ahmed Almogbel ◽  
Fahad Alkasmoul ◽  
Zaid Aldawsari ◽  
Jaber Alsulami ◽  
Ahmed Alsuwailem
Keyword(s):  
Saudi Arabia ◽  
Energy Consumption ◽  
Air Conditioning ◽  
High Growth ◽  
Operating Conditions ◽  
Air Conditioner ◽  
Air Conditioners ◽  
Air Conditioning Systems ◽  
Electrical Consumption ◽  
Day By Day

AbstractInterest for air-conditioning systems (ACs) has exponentially expanded worldwide throughout the most recent couple of decades. Countries with booming economies including Saudi Arabia report high growth of sales of room air conditioners. With the expanded (GDP) and warming climates, interest for room air-conditioning systems is required to additionally increment. Meeting the expanded need for electricity energy will be a challenge. Expanded utilization of energy-efficient air conditioners impactsly affects lowering the electricity demand. In an ordinary AC, the blower runs at a fixed speed and is either ON or OFF. In an inverter AC, the compressor is consistently on; however, power drawn relies upon the demand for cooling. The speed of the compressor is adjusted appropriately. In this paper, the energy consumption of non-inverter and an inverter AC of the same capacity was assessed in an average office room, under comparative operating conditions, to find the differences in the energy saving, Carbon Dioxide (CO2) emission, and power consumption of air conditioner. Energy consumption was measured for about 108 days, which is from July 16th to October 31st, 24/7, and compared. The experiment is conducted with the same conditions and same capacity air conditioners (18,000 BTU). Results show that the day-by-day normal vitality utilization, the inverter will save up to 44% of electrical consumption compared to a non-inverter of 3471 kWh/year and 6230 kWh/year respectively. Furthermore, the Total Equivalent Warming Impact (TEWI) analysis shows that inverters can save 49% of CO2 emissions.

Performance Study of the Household Air Conditioner under Extreme Climate Conditions

2013 ◽  
Vol 860-863 ◽  
pp. 1607-1611
Author(s):  
Xin Zhao ◽  
Wei Ting Jiang ◽  
Wei Guo Pan ◽  
Jun Li ◽  
Su Liu ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Cooling Capacity ◽  
Air Conditioner ◽  
Outdoor Temperature ◽  
Performance Study ◽  
Climate Conditions ◽  
Air Conditioners ◽  
Extreme Climate ◽  
Outdoor Climate ◽  
Future Direction

This paper used physical modeling method to simulate the running state of each component of the air conditioner, got the ideal conditions of air conditionor energy consumption model and then calibrated and corrected the model of the air conditioner energy consumption by the experimental data. After utilizing the model for the performance analysis of the actual air conditioner, it was found that the extreme outdoor climate would affect the performance of the air conditioner. In summer, the electricity required to produce the same amount of cooling capacity will be 210% compared with 30°C of outdoor temperature, when the outdoor temperature is 50 °C; In winter, the drop of outdoor temperature will seriously impact on the energy efficiency of air conditioner, when the outdoor temperature is-5°C the electricity required to produce the same amount of cooling capacity will be 150% compared with 10 °C of outdoor temperature. It is of great significance that the results shown in this research contributes to the analysis of air conditioner in extreme conditions, and amended energy consumption of the model can not only forecast the performance of household air conditioners under the extreme climate but also indicate the future direction of air conditionersdesign and improvement.

scholarly journals Climate Adaptability of Old and New House in Bushehr's Historical Texture

2020 ◽  
Vol 16 (2) ◽  
pp. 249-258
Author(s):  
Nadiya Mozafari ◽  
Masoud Alimardani
Keyword(s):  
Energy Consumption ◽  
Human Life ◽  
Air Conditioner ◽  
Climate Conditions ◽  
Air Conditioners ◽  
Traditional Design ◽  
Climate Adaptability ◽  
Reduce Energy Consumption ◽  
New Buildings ◽  
Climate Comfort

AbstractThe port of Bushehr, with its valuable and unique historical texture, completely matches with its unbearable climate conditions. Over hundreds of years, the port has provided an appropriate ground for human life as no air conditioner is needed there. Unfortunately, this valuable old texture has been destroyed inadvertently. New buildings in the port are just superficial copies of the old buildings’ external surfaces, with no attention to their goal, i.e., the provision of thermal comfort for inhabitants. The new buildings are dramatically increasing without considering the historical texture and climate. As a result, the inhabitants have to use air conditioners in most months continuously; hence, there would be an increase in energy consumption and a disruption in climate balance. This study has been conducted to compare the compatibility of such architecture with the climate and its success in providing climate comfort for the inhabitants. According to the information obtained from the study, the old houses built more than 100 years ago using traditional design had better performance in adaptability with climate. Accordingly, the exploitation of traditional instructions and patterns in a new format would largely reduce energy consumption in hot seasons and eliminate the need for heating in cold seasons. In this regard, a huge amount of energy is saved, resulting in less damage to the environment.

scholarly journals An Intelligent Feedback Controller Design for Energy Efficient Air Conditioning System

2020 ◽  
Vol 2 (3) ◽  
pp. 168-174
Author(s):  
P. Hengjinda ◽  
Dr. Joy Iong Zong Chen
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Controller Design ◽  
Comfort Level ◽  
Sensor Data ◽  
Air Conditioner ◽  
Human Comfort ◽  
Air Conditioning System ◽  
Proposed Model ◽  
Air Conditioning Systems

Air conditioning systems were invented to improve human comfort in a room or hall. An efficient air conditioner systems are always needed to minimize the power consumption. There are several settings with lot of control devices were introduced in the past years to achieve minimal energy consumption rate. Those control systems were minimized the energy consumption to certain limit without considering human comfort. The proposed model is designed to minimize the energy consumption with maximum human comfort. Several sensor modules were introduced in the model to predict human comfort level in a room or hall. The sensor data are taken as feedback to the air conditioning system for attaining maximum human comfort level. The proposed design is verified with energy consumption calculation and change in room temperature measurements.

A Field Survey of Occupancy and Air-Conditioner Use Patterns in Open Plan Offices

2010 ◽  
Vol 20 (1) ◽  
pp. 137-147 ◽  
Author(s):  
Geun Young Yun ◽  
Hyo Joo Kong ◽  
Jeong Tai Kim
Keyword(s):  
Energy Consumption ◽  
Building Energy ◽  
Air Cooling ◽  
Air Conditioner ◽  
Air Conditioners ◽  
Use Patterns ◽  
Building Management ◽  
Simulation Based ◽  
Open Plan ◽  
Survey Results

This paper reports the survey results from a field monitoring study of office occupancy and air-conditioner use pattern of an office building in Seoul, Korea, from 20 July to 29 September 2009. The survey has an aim to reveal the relationship between the indoor environment conditions and occupancy; and the use patterns of air-conditioners and energy consumption in offices. The results showed that the average occupied time of the investigated offices was 15.48 h per day for normal weekdays, which was longer than expected occupancy schedules assumed for offices for the design prediction of building energy consumption. This study also presents the hourly profiles of air-conditioner use and evaluates the effect of longer occupancy period on energy consumption for air cooling in open-plan offices in Korea. The findings of this study could contribute to inform building energy simulation based on realistic office occupancy profile provided by the survey, which would therefore inform better operation of air-conditioners and more efficient use of energy in building management.

scholarly journals Qualitative Study on Electricity Consumption of Urban and Rural Households in Chiang Rai, Thailand, with a Focus on Ownership and Use of Air Conditioners

2020 ◽  
Vol 12 (14) ◽  
pp. 5796
Author(s):  
Aya Yoshida ◽  
Panate Manomivibool ◽  
Tomohiro Tasaki ◽  
Pattayaporn Unroj
Keyword(s):  
Energy Consumption ◽  
Rural Areas ◽  
Rural Households ◽  
Electricity Consumption ◽  
Air Conditioner ◽  
Air Conditioners ◽  
Urban Households ◽  
The Future ◽  
Typical Period ◽  
Households With Children

This study investigated the differences in household energy consumption between urban and rural households in northern Thailand, with a particular focus on air-conditioner ownership and use. In-depth visits to 32 households in Chiang Rai were undertaken in 2016 and 2017. The data collection covered six aspects: household attributes, ownership of electric appliances, use of air conditioners (ACs), intentions to conserve electricity, desire to purchase electric appliances in the future, and prospects for a future lifestyle. Traditional stilt houses can still be found in rural areas, but ACs have been introduced as rural houses have modernized. The typical period of AC use in rural areas was 2 to 4 months during summer. In urban households, ACs were used for a longer period, from 3 to 12 months each year. In addition, rural households usually used ACs for only a few hours each day before sleeping, whereas urban households often used them while they slept and some used them throughout the day. Households with children and grandchildren tended to use the AC for longer periods. These results suggest that promotion of environmentally friendly lifestyles for younger adults to control overuse of ACs would be key to reducing energy consumption in the future.

Dehumidification Strategies to Improve Energy Use at Retailers: A Case Study of a Supermarket Located in Guayaquil, Ecuador

2020 ◽  
Author(s):  
Jaqueline Litardo ◽  
Rubén Hidalgo-León ◽  
Paul Coronel ◽  
Andrea Damian ◽  
José Macías ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Use ◽  
Building Energy ◽  
Energy Performance ◽  
Air Conditioner ◽  
Baseline Model ◽  
Air Conditioners ◽  
Frozen Food ◽  
Desiccant Wheel

Abstract This study aims to model and evaluate the energy performance of a supermarket located in Guayaquil, Ecuador. For this purpose, we modeled the baseline of the supermarket using EnergyPlus software. All input parameters used in the simulations were provided by the supermarket staff. Air-conditioners and refrigerated cases were modeled using the default templates in EnergyPlus but replacing the specifications of the site systems. The baseline model predicted, within ±10%, the energy consumption of the case study when compared to the real electricity bills of the building. Then, we incorporated a desiccant wheel for each of the air-conditioner units that supply the frozen food area. Results showed relevant reductions of about 52% in cooling energy by decreasing the humidity level from 70% to 40% with the use of desiccant systems. However, the introduction of these systems increased the total building energy consumption by about 3% due to the regeneration process.

Annual performance evaluation and experimental study on variable speed compressors for room air conditioners

2014 ◽  
Vol 229 (9) ◽  
pp. 1611-1622 ◽  
Author(s):  
Haifeng Zhang ◽  
Jianhua Wu ◽  
Cui Li ◽  
Yanzhong Li
Keyword(s):  
Experimental Study ◽  
Performance Evaluation ◽  
Energy Consumption ◽  
Environmental Concern ◽  
Dynamic Pressure ◽  
Air Conditioner ◽  
Variable Speed ◽  
Operation Condition ◽  
Air Conditioners ◽  
Actual Usage

Energy efficiency for room air conditioners has received increasing attention in recent years with the intense emphasis on environmental concern and energy consumption. As the main energy consumption component of air conditioner, compressor awaits further work to accomplish the transition of performance evaluation from one operation condition to its actual usage. In the present study, an evaluation index called annual efficiency is proposed to rate the annual performance of air conditioner compressor. Experimental study is conducted on four variable-speed compressors, and the results show that the best fit determined from annual efficiency is different from that of ASHRAE standard. The compressor efficiency and dynamic pressure are quite different at rated and half-capacity test conditions. Compressor running under half-capacity conditions is more energy efficient and peak phenomenon of dynamic pressure is less obvious when compared with rated conditions. Moreover, more attention should be paid to half-capacity conditions to improve the annual efficiency of compressor and energy-saving capabilities of air conditioners.

Sign in / Sign up

Export Citation Format

Share Document