Performance Assessment of a Novel Dew Point Air Conditioning System in the UK Climate Conditions

2009 ◽  
pp. 1-10
Keyword(s):  
Performance Assessment ◽  
Air Conditioning ◽  
Dew Point ◽  
Air Conditioning System ◽  
Climate Conditions ◽  
The Uk

Performance assessment of a desiccant air-conditioning system combined with dew-point indirect evaporative cooler and PV/T

Solar Energy ◽  
2022 ◽  
Vol 231 ◽  
pp. 566-577
Author(s):  
Umutcan Olmuş ◽  
Yunus Emre Güzelel ◽  
Engin Pınar ◽  
Arif Özbek ◽  
Orhan Büyükalaca
Keyword(s):  
Performance Assessment ◽  
Air Conditioning ◽  
Dew Point ◽  
Air Conditioning System ◽  
Evaporative Cooler

Exergy Analysis of Energy Consumption for Central Air Conditioning System

2014 ◽  
Vol 628 ◽  
pp. 332-337
Author(s):  
Xiao Xia Xia ◽  
Nai Jun Zhou ◽  
Zhi Qi Wang
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Exergy Analysis ◽  
Exergy Efficiency ◽  
Dew Point ◽  
Exergy Loss ◽  
Air Conditioning System ◽  
Air Cooler ◽  
Central Air Conditioning ◽  
Air Conditioning Systems

The energy consumption of several central air conditioning systems in summer was researched by the method of exergy analysis. Combined with actual example,the exergy loss of all the equipments and the exergy efficiency of three systems were calculated. The results show that the exergy efficiency of three systems is very low. Relatively speaking, the exergy efficiency of primary return air conditioning system with supplying air in dew point is highest. The equipment of highest exergy loss is air-conditioned room, while the exergy loss of surface air cooler is smallest. Based on this, several improvement measures were proposed to reduce exergy loss and improve exergy efficiency.

Vapour Compression and Liquid Desiccant Hybrid System for Air Conditioning

2006 ◽  
Author(s):  
Stefano Bergero ◽  
Anna Chiari ◽  
Enrico Nannei
Keyword(s):  
Air Conditioning ◽  
Power Saving ◽  
Operating Conditions ◽  
Dew Point ◽  
Operating Parameters ◽  
Direct Expansion ◽  
Liquid Desiccant ◽  
Hydrophobic Membrane ◽  
Air Conditioning System ◽  
Vapour Compression

The present study examines the performance of a hybrid air-conditioning system in which a vapour compression inverse cycle is integrated with an air dehumidification system working with hygroscopic solution and hydrophobic membrane. This approach may prove to be a valid alternative to the traditional summertime air-conditioning system, which involves cooling the air to below its dew point and subsequently reheating it. The system examined simultaneously cools and dehumidifies the air in an air-LiCl solution membrane vapour exchanger before it enters the conditioned environment. The LiCl solution is cooled by means of a vapour compression inverse cycle that uses the refrigerant KLEA 407C. The heat rejected by the condenser is used to regenerate the solution. A SIMULINK calculation programme was used to simulate the system in steady-state conditions. The performance of the system was analysed on varying significant operating parameters and was compared with that of a traditional direct-expansion air-conditioning plant. The results of the simulations revealed significant power saving which, in certain operating conditions, was as much as 50%.

Evaluation of membrane-based air pre-dehumidification for a capillary radiant air conditioning system

2020 ◽  
pp. 1420326X2096738
Author(s):  
Zan-She Wang ◽  
Fang-Ting Yin ◽  
Ran Li ◽  
Zhao-Lin Gu
Keyword(s):  
Moisture Content ◽  
Air Conditioning ◽  
Dew Point ◽  
Liquid Desiccant ◽  
Air Conditioning System ◽  
Point Temperature ◽  
Dew Point Temperature ◽  
Temperature Range ◽  
Libr Solution ◽  
The Ideal

The polyvinylidene fluoride hollow fibre membrane air dehumidification tests were carried out between the liquid desiccant solutions and the wet air. Three liquid desiccant solutions of LiBr solution (50%), LiCl solution (35%) and CaCl2 solution (40%) were tested under different wet air conditions. The results showed that all the membrane dehumidification processes were stable. The air moisture content in the outlet of the membrane was maintained as 6.5 g/kg (da)–8.2 g/kg (da) when the air moisture content in the inlet of the membrane was operated from 17.1 g/kg (da) to 32.4 g/kg (da). The dehumidification amount of LiBr solution (50%) and LiCl solution (35%) was more productive. On this basis, a membrane-based air pre-dehumidification process for the capillary radiant air conditioning system was built. Since the ideal dew point temperature range of the indoor air is below 14–17°C according to the cold supply water, all the air moisture content at the membrane outlet is much lower than that of the ideal dew point temperature range, which means non-condensing occurs in the capillary tube surface. The membrane-based air pre-dehumidification process can easily form an adaptive regulation process of humidity with the capillary radiant air conditioning system under different environmental parameters.

Performance assessment of PCM-based solar energy assisted desiccant air conditioning system combined with a humidification-dehumidification desalination unit

Desalination ◽  
2020 ◽  
Vol 496 ◽  
pp. 114705
Author(s):  
Nan Wang ◽  
Dongxuan Wang ◽  
Jungang Dong ◽  
Haitao Wang ◽  
Renliang Wang ◽  
...  
Keyword(s):  
Solar Energy ◽  
Performance Assessment ◽  
Air Conditioning ◽  
Air Conditioning System
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