scholarly journals Improving the Performance of Split Air Conditioner by Adding Nano Silver to the Compressor Oil

2021 ◽  
Vol 11 (4) ◽  
pp. 76-90
Author(s):  
Abdulqadir Hameed Rasheed ◽  
Adnan M. Hussein
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Mass Concentration ◽  
Cooling System ◽  
Regular System ◽  
Air Conditioner ◽  
High Demand ◽  
Natural Oil ◽  
Cooling Speed ◽  
The Stability

A high  demand on the energy and power has brought scholars more attention to investigate  new ways to reduce the energy consumption. The aim of this research is reducing the power consumption required for air conditioning to cool the room by adding nanomaterials to the compressor oil at a mass concentration of 0.15%. Two models of chambers with dimensions (2 x 2 x 2) meters were fabricated to represent the test section and connected to a 1ton compressor, one operating with natural oil as a standard basis for comparison, while the other one with Nano-oil prepared in the laboratory. The mass concentrations of 0.15% of silver nanoparticles (Ag) were prepared, and the stability of the nanoparticles was tested by direct observation for different time periods. The results indicated that the performance of the air conditioner was better with the addition of nanoparticles to the compressor oil compared to the pure oil in the compressor. Reducing energy consumption in the cooling system by (19%). Also, it was found that there is an increase in the cooling speed of the nanotechnology system by (6%)as well as  in the efficiency of the Nano-oil system compared to the regular system by (13%). This study showed that the thermophysical properties of the cooling oil increased by increasing the weight ratios of solid nanoparticles by (12%).

scholarly journals Comparative Analysis of Two Urban Microclimates: Energy Consumption and Greenhouse Gas Emissions

2019 ◽  
Vol 11 (7) ◽  
pp. 2045 ◽  
Author(s):  
Néstor Santillán-Soto ◽  
O. García-Cueto ◽  
Alejandro Lambert-Arista ◽  
Sara Ojeda-Benítez ◽  
Samantha Cruz-Sotelo
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Scientific Evidence ◽  
Electricity Consumption ◽  
Electrical Energy ◽  
Air Conditioner ◽  
Comparative Performance ◽  
Urban Complex ◽  
Arid Desert ◽  
Urban Microclimates

This paper presents a hypothetical and comparative performance of a 5 ton air conditioner (AC) operating in two zones in different urban microclimates for 25 days. One site represents a type of homogeneous planned urbanism and the other is a traditional heterogeneous zone. Air temperature data was collected and then processed using a linear regression model included in the operating manual of the AC in order to obtain their energy consumption. Results indicate that for an area with 500 homes, a traditional urban complex requires 12,350 kWh of electrical energy more than a planned zone (1.89%). This extra energy amounts up to $1180 and adds 9191 kg of CO2 to the atmosphere. The increased energy consumption has implications that increase the cost and environmental aspects of two urban microclimates, so that urbanization without planning is less friendly to the environment. In this sense, this study highlights the effects of urban microclimates on domestic electricity consumption from air conditioning. In addition, for a city with an arid desert climate, the variation in electricity consumption is associated with changes in the urban mosaic. The results found represent scientific evidence that can be used as a reference to establish public policies that could be incorporated into the local construction regulations, oriented to reduce the energy consumption associated with the use of air conditioning equipment.

Applicability Research on Evaporative Cooling Technology in Hunan Province

2014 ◽  
Vol 1070-1072 ◽  
pp. 1679-1683
Author(s):  
Qin Ouyang ◽  
Guang Xiao Kou ◽  
Min Ouyang
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Waste Heat ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Hunan Province ◽  
Design Parameters ◽  
Climate Conditions ◽  
Energy Saving Potential ◽  
Evaporative Cooling System

According to the climate conditions of Hunan province and the design parameters related to air conditioning, the energy consumption and the related characteristics of the liquid desiccant evaporative cooling system (LDECS) are compared with primary return air conditioning system. The results show that energy consumption of LDECS can be decreased by 11.78% compared to the primary return air system. LDECS has a certain degree of energy saving potential in Hunan province, especially when waste heat is available.

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.

An Analytical Comparison of Adsorption and Vapor Compression Air Conditioners for Electric Vehicle Applications

1996 ◽  
Vol 118 (1) ◽  
pp. 16-21 ◽  
Author(s):  
S. M. Aceves
Keyword(s):  
Electric Vehicle ◽  
Air Conditioning ◽  
Cooling System ◽  
Cooling Load ◽  
Air Conditioner ◽  
Vapor Compression ◽  
Adsorption System ◽  
Air Conditioners ◽  
Driving Cycles ◽  
Adsorption Systems

This paper shows an analysis of the applicability of an adsorption system for electric vehicle (EV) air conditioning. Adsorption systems are designed and optimized to provide the required cooling for four combinations of vehicle characteristics and driving cycles. The resulting adsorption systems are compared with vapor compression air conditioners that can satisfy the cooling load. The objective function is the overall system weight, which includes the cooling system weight and the weight of the battery necessary to provide energy for air conditioner operation. The system with the minimum overall weight is considered to be the best. The results show the optimum values of all the variables, as well as temperatures and amounts adsorbed, for the adsorption and desorption processes. The results indicate that, for the conditions analyzed in this paper, vapor compression air conditioners are superior to adsorption systems, not only because they are lighter, but also because they have a higher COP and are more compact.

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.

Experimental Investigation of Electrical Conductivity of Liquid Desiccant Solution

2012 ◽  
Vol 516-517 ◽  
pp. 1910-1916 ◽  
Author(s):  
Qing Cheng ◽  
Xiao Song Zhang
Keyword(s):  
Experimental Data ◽  
Electrical Conductivity ◽  
Energy Consumption ◽  
Energy Analysis ◽  
Cooling System ◽  
Air Conditioner ◽  
Regeneration System ◽  
Liquid Desiccant ◽  
Energy Saving Potential ◽  
Good Energy

Liquid desiccant cooling system is a novel air conditioner with good energy saving potential, which should be a promising choice to meet the needs of cooling and moisture loads. Among all regeneration methods, ED regeneration method should be a promising choice for liquid desiccant cooling system. In this paper, systematic experiments were carried out to investigate the electrical conductivity of desiccant solution. Experimental data of electrical conductivity of desiccant solution is acquired in the experiment, which will be greatly helpful to the energy analysis of ED regeneration system. The experimental results show that the energy consumption in the concentrated chambers is more than others for ED regeneration system cells. Moreover, increasing the temperature of desiccant solution may be a measurement to reduce the energy consumption of ED regeneration system.

scholarly journals Simulation and Analyses of a Novel Air-conditioning Solution for Improving Energy Saving in a Data Room

2021 ◽  
Vol 233 ◽  
pp. 01081
Author(s):  
Li Tong ◽  
CAI Liang ◽  
zhang xiao
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Simulation Software ◽  
Fluid Simulation ◽  
Air Conditioner ◽  
Large Area ◽  
Refrigeration Equipment ◽  
Airflow Field ◽  
New Type ◽  
The Impact

In view of the feature of long airflow path, high wind resistance, and large area of refrigeration equipment in traditional data room, a new type of under-floor modular air conditioner and its corresponding new air conditioning solution for data room is proposed in this paper. The mathematical and physical model of the new solution for data room is established through a computational fluid simulation software and compared with two mainstream air conditioning solutions. Meanwhile, the impact of these three different air conditioning solutions on the temperature field, airflow field and energy consumption are analysed. The results show that the new type air conditioning solution for data room not only can be used to improve the distribution of temperature and airflow in the data room, but also can greatly reduce the energy consumption of the system.

LATEST SYSTEM SIMULATION MODELS FOR HEATING, REFRIGERATION, AND AIR-CONDITIONING SYSTEMS, AND THEIR APPLICATIONS

2012 ◽  
Vol 20 (01) ◽  
pp. 1230001 ◽  
Author(s):  
KIYOSHI SAITO ◽  
JONGSOO JEONG
Keyword(s):  
Energy Consumption ◽  
Heat Pump ◽  
Air Conditioning ◽  
Large Scale ◽  
Simulation Models ◽  
Field Testing ◽  
Air Conditioner ◽  
Actual Field ◽  
The Government ◽  
Air Conditioning Systems

The energy consumption of the systems used in the heating, refrigerating, and air-conditioning field continues to increase. This necessitates improvements to the efficiency of these systems. However, in Japan, the performance of heating, refrigerating, and air-conditioning systems has already been improved greatly owing to the considerable efforts of manufacturers, the government, and academia. Therefore, it will not be easy to further decrease energy consumption simply by improving the efficiency of each system. In order to adhere to the demands of the worldwide energy saving policy, we need to investigate the best combinations and total energy management schemes for heating, refrigeration, and air-conditioning systems. To this end, simulation holds greater promise than actual field-testing because it is not easy to carry out such experiments on actual large-scale systems. High-precision simulation models are necessary for these investigations. Hence, we are developing simulation models for a heat pump, room air-conditioner, desiccant dehumidifier, indirect evaporative cooler, fuel cell, solar panel, and so on. This paper describes high-accuracy simulation models for a CO2 heat pump, absorption heat pump, and desiccant dehumidification system. We also discuss the simulator that we have developed, based on those models. This simulator is called "Energy Flow + M". It is very easy to use because it has a user-friendly GUI. It has already been made available worldwide through the Internet. It is expected to be used to decrease the energy consumed by heating, refrigeration, and air-conditioning systems.

The Temperature Control Based on the AHU of Fuzzy-PID

2013 ◽  
Vol 427-429 ◽  
pp. 537-540
Author(s):  
Xiang Dong Wang ◽  
Xin Wang ◽  
Jing Liang Wei ◽  
Shu Jiang Li
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Control Method ◽  
Air Conditioner ◽  
Fuzzy Pid ◽  
Control Effect ◽  
Fuzzy Pid Control ◽  
General Control ◽  
Input Quantity ◽  
Central Air Conditioning

Air conditioner unit which is a significant part of central air-conditioning is a multiinput-multioutput system.Because the input quantity of it is related with each other and influenced by multifarious interference, an ideal control effect is unavailable by general control method. It is also the main unit of energy consumption, so the refrigeration effect and the energy consumption of the central air-conditioning are determined by the control effect and efficiency of it. A neural network model is made according to the unit of air handing and controlled by the strategy of fuzzy-PID. It is proved by experiment that favorable control effect is available in case that the fuzzy-PID control strategy meets requirements when either there is interference or the target quantity changes.

Solar Photovoltaic Direct-Driven Air Conditioning System Performance in Iraq

2020 ◽  
Vol 38 (7A) ◽  
pp. 984-991
Author(s):  
Krar M. Kuder ◽  
Hashim A. Hussein ◽  
Ali H. Numan
Keyword(s):  
Air Conditioning ◽  
Pulse Width Modulation ◽  
Cooling System ◽  
Experimental System ◽  
Electrical Energy ◽  
Air Conditioner ◽  
Direct Drive ◽  
Air Conditioning System ◽  
Air Conditioners ◽  
Air Cooler

The present research paper is on photovoltaic air conditioning system using the direct drive method. The experimental system setup arranged in Iraq at Al-taje site at longitude 44.34 and latitude 33.432 during the summer season inside a room. The proposed off-grid system consists of an array of photovoltaic, battery used to store power, PWM (pulse width modulation) charge controller, and DC air cooler. During the examination of the system, proven success of this new type(dc air conditioner ) of client urges Iraq warm conditions as an alternative type used instead of the prevailing types of air conditioners (AC air conditioner )in Iraq which consume large amounts of electrical energy and gets a cooling system for the room full working on solar energy.                                                                                                                

Sign in / Sign up

Export Citation Format

Share Document