Key Technologies for Enhancing Energy Efficiency of the Dew Point Air Cooler and its Manufacturing, EPSRC

Impact ◽  
2018 ◽  
Vol 2018 (1) ◽  
pp. 90-92
Author(s):  
Xudong Zhao
Keyword(s):  
Energy Efficiency ◽  
Dew Point ◽  
Key Technologies ◽  
Air 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.

scholarly journals Experimental investigation of a super performance dew point air cooler

2017 ◽  
Vol 203 ◽  
pp. 761-777 ◽  
Author(s):  
Peng Xu ◽  
Xiaoli Ma ◽  
Xudong Zhao ◽  
Kevin Fancey
Keyword(s):  
Experimental Investigation ◽  
Dew Point ◽  
Air Cooler

scholarly journals Use of condensing economizers with developed surfaces to improve the energy efficiency of conventional gas-fired heat generators in boilers

2021 ◽  
Vol 263 ◽  
pp. 04024
Author(s):  
Dmitriy Kosorukov ◽  
Andrey Aksenov
Keyword(s):  
Energy Efficiency ◽  
Local Heating ◽  
Combustion Products ◽  
Hot Water ◽  
Dew Point ◽  
Efficient Design ◽  
Cold Surface ◽  
Boiler Plant ◽  
Temperature Combustion ◽  
The Russian Federation

The current financial and economic programme in the Russian Federation is aimed at increasing energy efficiency in all areas of society. The most effective way of increasing the efficiency of boiler plant operation is to improve the technology of deep heat recovery from the heated flue gas from the chimney system of hot-water boilers. The physical essence of this phenomenon consists in cooling the escaping high-temperature combustion products of gaseous fuel, through contact with the cold surface of the heat exchanger, to a temperature below the dew point under the pressure in the convective bundle of the boiler. In this regard, we set a goal to develop the most efficient design of condensing economizer, which would allow us to obtain fuel economy of gas boiler at the level of operation of condensing heat generators. A practical model of a condensing economizer for increasing the efficiency of heat generators based on convection-type gas boilers has been created. A study has been carried out, the results of which allow us to conclude on the effectiveness of its use for individual and local heating of residential and public buildings.

scholarly journals From the early days of 962 unmanned aerial vehicles (UAVs) to their integration into wireless networks

2021 ◽  
Vol 69 (4) ◽  
pp. 941-962
Author(s):  
Zoran Miličević ◽  
Zoran Bojković
Keyword(s):  
Energy Efficiency ◽  
Wireless Networks ◽  
Wireless Communications ◽  
Wireless Communication ◽  
Unmanned Aerial Vehicles ◽  
Communication Networks ◽  
Wireless Communication Networks ◽  
5G Networks ◽  
Aerial Vehicles ◽  
Key Technologies

Introduction/purpose: This paper provides an overview of Unmanned Aerial Vehicles (UAVs) from their early days to their integration into modern wireless networks. Methods: It analyzes, synthesizes and compares the UAVs development technologies throughout their history with significant aspects of their integration in wireless communication networks. Results: Important aspects of wireless communications as one of the key technologies for UAVs are presented. Next, energy efficiency as a research path for UAVs is considered. The paper also emphasizes the present state in this area as well as what the future of UAVs in communications will be. Conclusion: UAVs are important not only for widespread military usage in various combat operations and warfare environment, but also for other purposes such as their integration in 5G networks.

scholarly journals A statistical model for dew point air cooler based on the multiple polynomial regression approach

Energy ◽  
2019 ◽  
Vol 181 ◽  
pp. 868-881 ◽  
Author(s):  
Yousef Golizadeh Akhlaghi ◽  
Xiaoli Ma ◽  
Xudong Zhao ◽  
Samson Shittu ◽  
Junming Li
Keyword(s):  
Statistical Model ◽  
Polynomial Regression ◽  
Dew Point ◽  
Regression Approach ◽  
Air Cooler

scholarly journals Estimation of the coal fired heat plant energy efficiency increase after heat recovery from flue gas cooling down below the dew point

2019 ◽  
Vol 82 ◽  
pp. 01003
Author(s):  
Piotr Ostrowski ◽  
Filip Szelejewski
Keyword(s):  
Energy Efficiency ◽  
Flue Gas ◽  
Boiler House ◽  
Dew Point ◽  
Hard Coal ◽  
Steam Boiler ◽  
Gas Treatment ◽  
Efficiency Increase ◽  
Steam Boilers ◽  
Gas Cooling

The paper shows a method of the assessment of the energy efficiency of a modernised steam boiler house in which the thermal energy is recovered due to cooling of the flue gas below dew point. In addition to the energy recovery the modernisation also consists of a wet flue gas treatment that ensures a reduction in emissions of particulates and acidic gas. The publication presents the correct and simple indicator for the assessment of improvement of energy efficiency. Additionally some recommendations based on the example of settlement of savings made in hard coal heating plant, equipped with three steam boilers, fire-tube type, with a capacity of 3x3.0 t/h, operating with quasi-constant output during the year are shown.

scholarly journals Adaption of an Evaporative Desert Cooler into a Liquid Desiccant Air Conditioner: Experimental and Numerical Analysis

Atmosphere ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 40 ◽  
Author(s):  
Mustafa Jaradat ◽  
Mohammad Al-Addous ◽  
Aiman Albatayneh
Keyword(s):  
Indoor Air ◽  
Operating Cost ◽  
Dew Point ◽  
Air Conditioner ◽  
Liquid Desiccant ◽  
Human Thermal Comfort ◽  
Effectiveness Model ◽  
Air Cooler ◽  
Maximal Deviation ◽  
Air Conditioning Systems

Desert coolers have attracted much attention as an alternative to mechanical air conditioning systems, as they are proving to be of lower initial cost and significantly lower operating cost. However, the uncontrolled increase in the moisture content of the supply air is still a great issue for indoor air quality and human thermal comfort concerns. This paper represents an experimental and numerical investigation of a modified desert air cooler into a liquid desiccant air conditioner (LDAC). An experimental setup was established to explore the supply air properties for an adapted commercial desert cooler. Several experiments were performed for air–water and air–desiccant as flow media, at several solutions to air mass ratios. Furthermore, the experimental results were compared with the result of a numerical simplified effectiveness model. The outcomes indicate a sharp reduction in the air humidity ratio by applying the desiccant solutions up to 5.57 g/kg and up to 4.15 g/kg, corresponding to dew point temperatures of 9.5 °C and 12.4 °C for LiCl and CaCl2, respectively. Additionally, the experimental and the numerical results concurred having shown the same pattern, with a maximal deviation of about 18% within the experimental uncertainties.

scholarly journals Feasibility analysis for a novel dew point air cooler applied in warm and humid climate: a case study in Beijing

2019 ◽  
Vol 158 ◽  
pp. 2126-2131 ◽  
Author(s):  
Peng Xu ◽  
Xiaoli Ma ◽  
Xudong Zhao ◽  
Yaxuan Xiong ◽  
Yanbing Sun
Keyword(s):  
Dew Point ◽  
Feasibility Analysis ◽  
Humid Climate ◽  
Air Cooler

Boosting Gas Processing Energy Efficiency by Waste Heat Recovery

2021 ◽  
Author(s):  
Waneya Abdulla Al Ketbi ◽  
Saqib Sajjad ◽  
Eisa Salem Al Jenaibi
Keyword(s):  
Energy Efficiency ◽  
Feasibility Study ◽  
Flue Gas ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Dew Point ◽  
Gas Temperature ◽  
Gas Processing ◽  
Sulphur Recovery

Abstract A continual improvement in energy efficiency of existing plants is imperative to achieve ADNOC target to reduce greenhouse gas emissions (GHG) intensity of operations by 25% in year 2030. The waste heat recovery (WHR) from incinerator stacks of existing Sulphur Recovery Units (SRUs) in ADNOC Gas Processing exhibits a substantial potential & contributor of energy savings and emission abatement. A high level assessment was carried out for various heat sources, results showed substantial WHR potential can be availed from SRUs. Consequently, a feasibility study was carried out to evaluate several options to recover energy from incinerator stacks of existing Sulphur Recovery Units (SRUs). The feasibility study addressed three options of recovering energy from SRUs incinerator stack exhaust; generating saturated steam, generating power and combined solution of steam & power. Those options were assessed in terms of technical feasibility and commercial viability. The study indicated that steam generation by HRSGs is technically viable and economically feasible, and considered as the best option for WHR from the existing SRU Incinerator Stacks. The WHR benefits that can be realized from just one incinerator stack by recovering the waste heat and reducing the flue gas temperature by 400 °C only (from 700 to 300 °C) are: More than 80 TPH saturated HP steam generationFuel gas savings and corresponding monetary benefitsSignificant abatement in GHG emissions The study revealed that WHR does not pose acid condensation risk due to the safe margin between the acid dew point and the actual flue gas temperature. The study also established that other constraints like pressure drop, space, tie-in location and emissions dispersion are not the showstoppers.

scholarly journals Study on The Effect of Different Plenum Chamber Coefficients on Frosting of Air-cooler

2021 ◽  
Vol 321 ◽  
pp. 04019
Author(s):  
Bin Liu ◽  
Shengqiang Shi ◽  
Yongshan Liu ◽  
Rachid Bennacer ◽  
Aiqiang Chen ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Velocity Distribution ◽  
System Performance ◽  
Cooling System ◽  
High Humidity ◽  
Refrigeration System ◽  
Environmental Chamber ◽  
Plenum Chamber ◽  
Air Cooler

The performance of the air-cooler in the refrigeration system plays a key role in improving the energy efficiency. Here, the plenum chamber coefficient was defined to study a possible way of enhancing the refrigeration system performance. In order to investigate the influence of the plenum chamber coefficient on the frosting and the cooling system of the chillers, three plenum chamber coefficients (0.74,0.97,1.2) were studied under high humidity. The temperature decreasing curve of the environmental chamber, the velocity distribution of the air cooler, and the frost accumulation under and on the air-cooler were analysed. The results show that the frost accumulation on the tube will increase with the increase of the plenum chamber coefficient and the frost accumulation on the fin will increase at first and then decrease with the increase of the plenum chamber coefficient. On the whole, in this study, frosting is the most obvious when the plenum chamber coefficient was 0.97

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