scholarly journals Design of an adiabatic air conditioning package system

2022 ◽  
Vol 13 ◽  
pp. 8
Author(s):  
Sachin Sunil Mothiravally ◽  
Sachidananda Hassan Krishanmurthy
Keyword(s):  
Thermal Analysis ◽  
Energy Consumption ◽  
Return On Investment ◽  
Air Conditioning ◽  
Energy Savings ◽  
Coefficient Of Performance ◽  
Cooling Systems ◽  
Air Conditioning System ◽  
Adiabatic Cooling ◽  
Save Energy

Air conditioning plays a significant role to maintain a cool atmosphere in warm conditions, However, the power consumed by the machine is higher. The commercial prevailing cooling systems are required to operate ventilation and cooling systems in buildings and in turn consumes more power. These systems apart from consuming electricity it also adds to the CO2 emissions to our environment. These energy consumption and CO2 emissions can be decreased by the assistance of energy effective frameworks to the prevailing air conditioning system. The study was conducted on a package unit of 414.2 kW by measuring the relative humidity, dry bulb, and wet bulb temperature to investigate the effect of indirect evaporative cooling on the systems COP. Also, the modelling of the package unit was done using Creo software and the analysis was carried out using ANSYS considering the flow and thermal analysis for different components of the package units. From this analysis it can be observed that by implementing the adiabatic cooling in package unit it is possible to save energy consumption. From the results it can be concluded that energy efficiency was more and the return on investment is high. Also, coefficient of performance of this machine is high and consumes less electricity and the expected energy savings is 20%.

Analysis for Energy Savings Potential and Economics of Combined Air-Conditioning System with Temperature and Humidity Decoupled Treatment

2011 ◽  
Vol 280 ◽  
pp. 71-75
Author(s):  
Zhong Chao Zhao ◽  
Dong Hui Zhang ◽  
Yu Ping Chen
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Air Conditioning ◽  
Energy Savings ◽  
Operating Cost ◽  
Air Conditioning System ◽  
Operation Mechanism ◽  
Energy Saving Potential ◽  
Temperature And Humidity

In this paper, the operation mechanism of combined air-conditioning system with temperature and humidity decoupled treatment (CACSTHDT) was presented, and the energy saving potential and economics of CACSTHDT were primarily analyzed through compared with a traditional air-conditioning system. The results indicated that CACSTHDT could save up to 28.64% energy consumption in comparison with a traditional air-conditioning system. The operating cost in one summer only was 71.36% of that cost of traditional air-conditioning system.

Comparison study of air mixing modes in liquid desiccant based all-air air conditioning systems

2011 ◽  
Vol 33 (4) ◽  
pp. 423-435 ◽  
Author(s):  
Fu Xiao ◽  
XiaoFeng Niu
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Coefficient Of Performance ◽  
Liquid Desiccant ◽  
Total Energy Consumption ◽  
Air Conditioning System ◽  
Operation Conditions ◽  
Air System ◽  
Air Mixing ◽  
Air Conditioning Systems

Liquid desiccant is an energy-saving, environmentally friendly and healthy means of air dehumidification. A liquid desiccant-based all-air air conditioning system is studied by simulation. Two different modes of air mixing between the return air and the fresh air are compared, that is mixing before and mixing after the liquid desiccant dehumidifier, respectively. System performance and total energy consumption of the two modes under different operation conditions are obtained. The results show that mixing air after dehumidification consumes less energy than mixing air before dehumidification. Coefficient of performance (COP) of the all-air system with air mixing after dehumidification is higher. The differences of COP and energy consumption between the two air mixing modes increase when the outdoor air temperature and relative humidity increase. Practical application: Liquid desiccant based all-air system is quite suitable for museums, libraries and computer centres where water is not allowed to enter the space for property safety and strict thermal-hygrometric control is necessary. The results of this paper provide guidelines on the selection of air mixing modes in liquid desiccant-based all-air systems, considering energy consumption and system COP.

Energy Savings in Air Conditioning System Using Ejector: An Overview

2014 ◽  
Vol 493 ◽  
pp. 93-98 ◽  
Author(s):  
Kasni Sumeru ◽  
Luga Martin ◽  
Farid Nasir Ani ◽  
Henry Nasution ◽  
Farid Nasir Ani
Keyword(s):  
Air Conditioning ◽  
Energy Savings ◽  
Waste Heat ◽  
Refrigeration Cycle ◽  
Vapor Compression ◽  
Air Conditioning System ◽  
Vapor Compression Refrigeration Cycle ◽  
Performance System ◽  
Vapor Compression Refrigeration ◽  
Save Energy

There are two ejector configurations described in the present study: ejector refrigeration cycle and the ejector as an expansion device. The use of waste heat from the car engine and industry as a heat-driven energy for air conditioning system in automobile and building can save energy. Although the ejector refrigeration cycle has a low COP, the use of waste heat as a heat-driven energy incurs a lower operational cost compared with vapor compression refrigeration system. In addition, an ejector as an expansion device can be applied in the vapor compression refrigeration cycle to improve the performance system.

Study on Solar Air-Conditioning System of Temperature Difference

2012 ◽  
Vol 482-484 ◽  
pp. 1051-1056
Author(s):  
Cheng Yao Zhong
Keyword(s):  
Energy Consumption ◽  
Solar Energy ◽  
Temperature Difference ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Cost Of Electricity ◽  
Chilled Water ◽  
Save Energy ◽  
The Cost

In the solar air-conditioning system, it makes chilled water reduced to the lowest temperature in the night of the day without any form of energy consumption, and then makes use of water-cooled chillers of air conditioning to refrigerate further in the valley period of electricity consumptions. By doing this, it can improve the refrigeration coefficient of the air- conditioning system, and save energy and cost of electricity substantially. It will make the cost of solar air- conditioning lower than conventional air conditioning, and furthermore provides a broad way for the popularity of solar energy and solar air conditioning.

scholarly journals Utilization of Solar Energy for Air Conditioning System

2018 ◽  
Vol 156 ◽  
pp. 03040 ◽  
Author(s):  
Juwari Purwo Sutikno ◽  
Serlya Aldina ◽  
Novita Sari ◽  
Renanto Handogo
Keyword(s):  
Solar Energy ◽  
Air Conditioning ◽  
Energy Savings ◽  
Electrical Energy ◽  
Point Of View ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Absorption Refrigeration ◽  
Air Conditioning System ◽  
Single Effect

The purposes of this research are to do a system simulation of air conditioning utilizing solar energy with single effect absorption refrigeration method, analyze the coefficient of performance (COP) for each absorbent-refrigerant variable and compare the effectivity of every absorbent-refrigerant variable used. COP is a constant that denotes the effeciency of a refrigeration system, that is ratio of work or useful output to the amount of work or energy input. The higher the number of COP, the more efficient the system is. Absorbent-refrigerant (working fluids) variables used in this research depend on its chemical and thermodynamics properties. Steps in this research are including data collection and tabulation from literature and do a simulation of air conditioning system both commercial air conditioning system (using electrical energy) and solar energy air conditioning system with Aspen Plus software. Next, run the simulation for each working fluid variables used and calculate the COP for each variable. Subsequently, analyze and compare the effectivity of all variables used from COP value and economical point of view with commercial air conditioning system. From the result of the simulation, can be concluded that solar air conditioning can achieve 98,85 % of energy savings than commercial air conditioning. Furthermore, from the calculation of COP, the highest COP value is achieved by solar conditioning system with LiNO3-NH3 as working fluid where 55% of the composition is the refrigerant and 45% of absorbent.

scholarly journals The Life Cycle Cost Study Comparison Of Air Conditioning System At Q Building Petra Christian University Surabaya

2020 ◽  
Vol 7 (1) ◽  
pp. 10-22
Author(s):  
Devina Kartika Santoso ◽  
Jimmy Priatman ◽  
Christina Eviutami Mediastika
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Life Cycle Cost ◽  
Air Conditioning ◽  
Cost Evaluation ◽  
Operational Cost ◽  
Air Conditioning System ◽  
Cost Study ◽  
Christian University ◽  
Save Energy

Global warming has been increasing since last 5th years. This problem emerged because of the development of highrise building these days. In a building, air conditioning system has the largest percentage of building’s energy consumption, 55-65% of total building’s energy consumption. An efficient and economic air-conditioning system is needed to save energy and operational cost as much as possible. Life cycle cost analysis is conducted to evaluate the air conditioning system by comparing some alternatives system. The datas are retrieved from building management and some supplier, also mechanical and electrical contractors. This research is conducted by calculating the investment cost (C), operational cost (O), maintenance and replacement cost (R), and salvage value (S). Before calculating life cycle cost, all cost is converted with annual worth method. Life cycle cost evaluation is capable to save operational cost up to 34%.

scholarly journals Experimental investigation of desiccant dehumidification based thermoelectric air-conditioning system

2021 ◽  
Author(s):  
Anurag Maheswari ◽  
◽  
Manoj Kumar Singh ◽  
Yogesh K. Prajapati ◽  
Niraj Kumar ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Waste Heat ◽  
Coefficient Of Performance ◽  
Electric Heater ◽  
Cooling Systems ◽  
Air Conditioning System ◽  
Desiccant Wheel ◽  
Cooling Effects ◽  
Conventional Cooling ◽  
Te Modules

Vapor compression refrigeration system (VCRS) based conventional cooling systems run on the high amount of electricity and refrigerants responsible for greenhouse emissions. To save the environment and high-grade energy, traditional cooling systems should be replaced with some environment-friendly alternative. This paper proposed alternative eco-friendly air-conditioning systems based on an amalgam of two different technologies, i.e., desiccant dehumidification and thermoelectric (TE) cooling. The proposed air-conditioning system has the following subprocess: dehumidification of moist air by the solid desiccant wheel, cooling of processed air by TE modules, and regeneration of desiccant wheel by an electric heater and waste heat from TE modules. The air conditioning system has been experimentally studied for cooling performance, cooling effect, and energy input. The maximum coefficient of performance of 0.865 can be achieved with the proposed system, and it can be used for cooling effects up to 1442.24 W to maintain the human comfort condition in the chamber i.e. approximately 22 ℃ and RH 50% defined by ASHRAE.

Research on the Regionalism Air-Conditioning System Design of Car and Saving Energy

2014 ◽  
Vol 989-994 ◽  
pp. 2796-2801
Author(s):  
Li Ouyang ◽  
Die Li
Keyword(s):  
Heat Transfer ◽  
Steady State ◽  
Energy Consumption ◽  
System Design ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Steady State Heat ◽  
Save Energy ◽  
Steady State Heat Transfer ◽  
Heat Transfer Calculation

The air-conditioning load is directly related to energy consumption of the car. Based on the characteristics and sources of the air-conditioning load of the car driven in four typical cities, this paper gives an analysis on the air-conditioning load using the steady-state heat transfer calculation method. The result indicates the regionalism design on the air-conditioning system for car is feasible and beneficial to save energy.

scholarly journals A hybrid air conditioning system using solar energy to save electrical energy with improving performance

2021 ◽  
Vol 288 ◽  
pp. 01066
Author(s):  
Ahmed Al–Okbi ◽  
Yuri Vankov ◽  
Hasanen Mohammad Hussain
Keyword(s):  
Energy Consumption ◽  
Solar Energy ◽  
Solar Collector ◽  
Air Conditioning ◽  
Electrical Energy ◽  
Coefficient Of Performance ◽  
Electricity Production ◽  
Air Conditioner ◽  
Solar Thermal Energy ◽  
Air Conditioning System

The process of operating an air conditioning system by hybrid energy that uses solar energy for purpose of saving electrical energy with improving the performance from modern and environmentally friendly systems. With high demand for air-conditioning systems in summer in hot regions, especially in Iraq due to high temperatures, the issue of using renewable energies becomes more attractive due to the continuous interruption of electrical energy. Air conditioners in Iraq consume more than half of the average electricity production. Therefore, saving energy leads to ensuring the reliability of electricity and reduces the consumption of fuel and gases that pollute the environment and negatively affect on the ozone layer. In the current research, the atmosphere of the city Baghdad was used to collect the solar thermal energy through a vacuum solar collector and combine it with a conventional air conditioner in order to reduce the electrical energy consumption on the compressor and increase the coefficient of performance. Several tests were conducted on the experimental device for comparing results with the conventional device and evaluating performance. The results showed that the performance with the vacuum solar collector became more efficient 8.97 instead of 4.27 than with the conventional system, and the energy consumption decreased by 52%.

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