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 ENERGY AND COST SAVING POTENTIAL OF HOTEL AIR CONDITIONING USING MAGNETIC BEARING CHILLER IN JAKARTA

2021 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Agus Marjianto ◽  
Hafthirman Hafthirman ◽  
Prihadi Setyo Darmanto
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Air Conditioning ◽  
Cost Savings ◽  
Electrical Energy ◽  
Magnetic Bearing ◽  
Air Conditioning System ◽  
Variable Flow

The use of magnetic bearing chillers in hotel air conditioning systems is an opportunity for energy or cost savings. This study will compare the electrical energy consumption and cost analysis of the centralized air conditioning system using magnetic bearing chiller that uses variable flow to another air conditioning system such as the centralized air conditioning using constant flow chiller and the VRF split air conditioning system at Hotel A in Jakarta. The calculation of energy consumption for each air conditioning system is carried out for a year. Meanwhile, the cost analysis will be carried out using the life cycle cost method for 20 years. The air conditioning system which has the least energy consumption and has the lowest life cycle cost is the best air conditioning system for this hotel building. The maximum cooling load that occurs in Hotel A is 3,281 kW. From the results of energy calculations and cost analysis, a centralized air conditioning system with magnetic bearing chiller with variable flow is the best choice to Hotel A or similar building to Hotel A, with IKE (Intensitas Konsumsi Energi) value of 84 kWh/(m2.year), and a total cost of 78,873,678,478.00 IDR for a period of 20 years.

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%.

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 Perancangan Sistem Tata Udara Ditinjau dari Aspek Energi dan Biaya pada Bangunan Hotel di Semarang

2020 ◽  
Vol 2 (3) ◽  
pp. 97-106
Author(s):  
Agus Marjianto ◽  
Dave Mangindaan
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Air Conditioning ◽  
Tourism Industry ◽  
Cost Calculation ◽  
Life Cycle Cost Analysis ◽  
Cooling Load ◽  
Air Conditioning System ◽  
Central Air Conditioning

[Design of air conditioning system based on the energy and costs aspect of  hotel buildings in Semarang] Indonesia’s economic growth has been above 5% for the past few years. Tourism industry is one of the sectors that shows a significant progress. The improvement in tourism industry has to be supported with good hospitality industry as well. Air conditioning system is one of the main utilities in a hotel building. The design of the air conditioning system for a hotel building must pay close attention to the thermal comfort factor for the guests, safety factor, and energy and cost efficiency aspect of it. Air conditioning system design consists of cooling load calculation for the hotel, air conditioning system selection, energy and cost calculation using the life cycle cost analysis. The maximum cooling load in this hotel is 3.279 kW. From that cooling load, three alternative systems are being considered, which are the central air conditioning system using chiller machine that has constant flowrate, the central air conditioning system using chiller machine that has variable flowrate, and the split air conditioning system using VRF machine. Energy analysis and life cycle cost analysis for 20 years was performed to be able to decide the best system. From that energy and cost analysis it can be concluded that the second alternative, which is three units of chiller with variable discharge with a capacity of 1,100 kW for each chiller, is the best system for the hotel. This system has an energy consumption intensity value of 118 kWh/m2 per year and total cost of Rp. 87,707,416,390  for a period of 20 years.

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.

Life Cycle Inventories of Renewable Energy Construction Project — Energy Consumption and Direct Emission

2012 ◽  
Vol 193-194 ◽  
pp. 180-183
Author(s):  
Yue Ren ◽  
Jie Ren
Keyword(s):  
Renewable Energy ◽  
Life Cycle ◽  
Energy Consumption ◽  
Air Conditioning ◽  
Construction Project ◽  
Construction Stage ◽  
Air Conditioning System ◽  
The Sustainable Development ◽  
Direct Emission ◽  
Total Life

Renewable energy construction project can promote the sustainable development. The life cycle list of the air conditioning system of a renewable energy construction project has been established. Calculate this project’s energy consumption and emissions at construction stage and operation stage. The emissions include CO2、SO2、NOx、CO、CH4、PM、NMVOC and NO2. This project in the whole construction stage of the energy consumption is 17861224.1 MJ, accounting for 23% of the total life cycle energy consumption.

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