Energy analysis and design comparison of VRV system of a building with split air-conditioning system

2016 ◽  
Vol 6 (3) ◽  
pp. 137
Author(s):  
Faiz Masoodi ◽  
M.M. Hassan ◽  
Mohd Aasif Ali ◽  
Sajjad Hasan
Keyword(s):  
Air Conditioning ◽  
Energy Analysis ◽  
Air Conditioning System ◽  
Analysis And Design ◽  
Design Comparison

ENERGY ANALYSIS FOR LIGHTING AND AIR-CONDITIONING SYSTEM OF AN ACADEMIC BUILDING

2015 ◽  
Vol 76 (5) ◽  
Author(s):  
Tee Boon Tuan ◽  
Ahmad Zubair Yahaya ◽  
Younus Fahad Breesam ◽  
Reduan Mat Dan ◽  
Muhammad Zulfattah Zakaria
Keyword(s):  
Air Conditioning ◽  
Energy Analysis ◽  
Building Energy ◽  
Consumption Pattern ◽  
Lighting System ◽  
Energy Audit ◽  
Energy Usage ◽  
Air Conditioning System ◽  
Academic Building

Energy analysis is important to analyze energy consumption pattern, monitoring on how the energy used varies with time in the building and how the system element interrelate. In this case study, a preliminary energy audit is done on lighting and air-conditioning system. The lighting and airconditioning system consume the highest amount from the total building energy usage. The study was conducted in the Faculty of Mechanical Engineering Building, Universiti Teknikal Malaysia (UTeM) Technology Campus. From the result shows  that the air-conditioning system has contributed approximately 48.8% from the total monthly energy usage. The estimation of Building Energy Index (BEI) for the cooling load is 655.19 kWh/m²/year. Meanwhile, the BEI for lighting system is found approximately 150 kWh/m2/year. 

scholarly journals Energy efficiency of ground-air heat exchanger in the ventilation and airconditioning systems

2018 ◽  
Vol 46 ◽  
pp. 00015
Author(s):  
Rafał Łuczak ◽  
Bogusław Ptaszyński ◽  
Zbigniew Kuczera ◽  
Piotr Życzkowski
Keyword(s):  
Heat Exchanger ◽  
Air Conditioning ◽  
Energy Analysis ◽  
Climatic Conditions ◽  
Energy Costs ◽  
Air Conditioning System ◽  
Heating And Cooling ◽  
Air Heating ◽  
Article Analysis ◽  
Working Together

In the article, analysis of heat exchangers, working together with air-conditioning system, are presented. For an object with known requirement to hot and cold, air heat exchanger (ground type) is designed. For that defined system, the energy analysis of heat exchanger’s energy work in yearly cycle, including a work of air treatment with full (cooling - desiccation and heating of air in the summer, heating and moisturizing in the winter) and not quite full (cooling of air in the summer, heating of air in the winter) air-conditioning are examined. Effects connected with a reduction of energy costs needed for heat treatment of air blown to the room are specified included the climatic conditions like air heating and cooling degree-hours.

Thermal energy analysis on liquid desiccant air conditioning system at different desiccant solution parameters

2019 ◽  
Vol 233 (5) ◽  
pp. 1052-1065
Author(s):  
Y Siva Kumar Reddy ◽  
Karthik Balasubramanian ◽  
VP Chandramohan
Keyword(s):  
Heat Capacity ◽  
Thermal Energy ◽  
Air Conditioning ◽  
Energy Analysis ◽  
Operating Parameters ◽  
Liquid Desiccant ◽  
High Concentration ◽  
Air Conditioning System ◽  
Capacity Ratio ◽  
Solution Parameters

Selection of suitable liquid desiccant operating parameters plays a significant role in the design of energy efficient liquid desiccant air conditioning system. To achieve same dehumidification rate from ambient air, different combinations of solution parameters (heat capacity ratio, concentration, and vapor pressure) could be employed in the system. Considering dehumidifier air inlet condition and dehumidification rates are fixed, an analytical study is carried out on the thermal energy analysis of the system at different solution operating parameters. Operating parameters considered in this study are solution concentrations ( Cs = 0.25, 0.3, 0.35 and 0.40) and heat capacity ratios ([Formula: see text] = 2.5, 3, 4 and 5). Control volume which includes a pair of air and solution channels (half width channels) of full scale liquid-to-air membrane energy exchangers (LAMEE) has been chosen to analyze the energy transfer between air and solution. The results indicate system requires lesser chiller load ( Qchiller) at high concentration and low heat capacity ratio ( Cs = 0.40 and [Formula: see text] = 2.5) which is 0.29 kW to achieve 0.61 kW cooling load. This is 99% lesser than the Qchiller at high concentration and high heat capacity ratio ( Cs = 0.40 and [Formula: see text] = 5) and 30% lesser than the Qchiller at low concentration and low heat capacity ratio ( Cs = 0.25 and [Formula: see text] = 2.5). Solution heat addition rate ( Qadd) per kW cooling capacity ( Qcc) at this solution condition is found as 0.85 kW.

Performance and energy analysis of a solar hybrid desiccant air-conditioning system

2016 ◽  
Author(s):  
Zuraini Mohd Enggsa ◽  
Arfidian Rachman ◽  
Yusof Sulaiman ◽  
M. Asmidzam ◽  
Sohif Mat ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Energy Analysis ◽  
Air Conditioning System

ANALYSIS OF COMPETING VARIANTS OF AIR CONDITIONING SYSTEMS WITHOUT AIR EXTRACTION FROM ENGINES AT THE STAGE OF PASSENGER AIRCRAFT ONBOARD SYSTEMS CONCEPTUAL DESIGN

2019 ◽  
Vol 6 (3) ◽  
pp. 80-85
Author(s):  
Denis Igorevich Smagin ◽  
Konstantin Igorevich Starostin ◽  
Roman Sergeevich Savelyev ◽  
Anatoly Anatolyevich Satin ◽  
Anastasiya Romanovna Neveshkina ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Air Conditioning ◽  
Research University ◽  
Cooling System ◽  
Fuel Efficiency ◽  
Air Cooling ◽  
Moscow Aviation Institute ◽  
Air Conditioning System ◽  
Low Efficiency ◽  
Air Conditioning Systems

One of the ways to achieve safety and comfort is to improve on-board air conditioning systems.The use of air cooling machine determines the air pressure high level at the point of selection from the aircraft engine compressor. Because of the aircraft operation in different modes and especially in the modes of small gas engines, deliberately high stages of selection have to be used for ensuring proper operation of the refrigeration machine in the modes of the aircraft small gas engines. Into force of this, most modes of aircraft operation have to throttle the pressure of the selected stage of selection, which, together with the low efficiency of the air cycle cooling system, makes the currently used air conditioning systems energy inefficient.A key feature of the architecture without air extraction from the main engines compressors is the use of electric drive compressors as a source of compressed air.A comparative analysis of competing variants of on-board air conditioning system without air extraction from engines for longrange aircraft projects was performed at the Moscow Aviation Institute (National Research University).The article deals with the main approaches to the decision-making process on the appearance of a promising aircraft on-board air conditioning system at the stage of its conceptual design and formulated the basic requirements for the structure of a complex criterion at different life cycle stages.The level of technical and technological risk, together with a larger installation weight, will require significant costs for development, testing, debugging and subsequent implementation, but at the same time on-board air conditioning system scheme without air extraction from the engines will achieve a significant increase in fuel efficiency at the level of the entire aircraft.

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