scholarly journals Economic Assessment of Different Air-conditioning and Heating Systems for Electric City Buses Based on Comprehensive Energetic Simulations

2015 ◽  
Vol 7 (3) ◽  
pp. 398-406 ◽  
Author(s):  
Dietmar Göhlich ◽  
Tu-Anh Ly ◽  
Alexander Kunith ◽  
Dominic Jefferies
Keyword(s):  
Air Conditioning ◽  
Economic Assessment ◽  
Heating Systems

The Economic Performance of Ground-Source Heat Pumps

2014 ◽  
Vol 919-921 ◽  
pp. 1735-1738 ◽  
Author(s):  
Peng Gong ◽  
Jian Tang
Keyword(s):  
Energy Efficiency ◽  
Total Energy ◽  
Heat Pump ◽  
Air Conditioning ◽  
Ground Source Heat Pump ◽  
Ground Source Heat Pumps ◽  
Heating Systems ◽  
Ground Source ◽  
Groundwater Heat Pump ◽  
Central Air Conditioning

Ground-Source Heat Pump (PSHP) was verified by US Environmental Protection Agency (EPA) as one of the most efficient air conditioning systems on present market. It has a higher efficiency than other heating systems from 50% to 70%, and a higher efficiency than other cooling systems from 30% to 50%. The working principle of PSHP determines its low operating costs. By comparing the total energy efficiency, the existing groundwater heat pump total energy efficiency is the highest, about 115%. The total energy efficiency for soil-source heat pump is up to 100%. But traditional air conditioning is far less than the level. Articles present a research on Ground-Source Heat Pump system and its cost with a scientific and objective principles. Ground-source heat pump is a new central air conditioning system of Low-carbon energy saving. Due to the high technical content, function requirement, and installation difficulty , the average initial investment of ground-source heat pump is much higher than traditional central air conditioning. Taking into account the added costs of heating systems based on traditional central air-conditioning, such as boilers, it will not deviate too much from it.

scholarly journals Assessing the Environmental Impact of Thermal Transmittance Tests Performed in Façades of Existing Buildings: The Case of Spain

2020 ◽  
Vol 12 (15) ◽  
pp. 6247
Author(s):  
David Bienvenido-Huertas
Keyword(s):  
Energy Consumption ◽  
Environmental Impact ◽  
Thermal Gradient ◽  
Air Conditioning ◽  
Experimental Methods ◽  
Existing Buildings ◽  
Heating Systems ◽  
Thermal Transmittance ◽  
Test Conditions ◽  
Air Conditioning Systems

Thermal transmittance tests constitute an appropriate tool to assess the energy performance of existing buildings. The heat flow meter method and the thermometric method are the most used experimental methods. One of the main criteria to guarantee appropriate test conditions and the representation of results is to ensure a high thermal gradient. For this purpose, heating or air conditioning systems should be used from three to seven days. Most studies related to experimental methods have addressed the appropriate test conditions; however, the environmental impact related to these conditions have not been analyzed. This study analyzes the energy consumption and the CO2 emissions related to the conditions of the thermal gradient required for tests. An energy analysis of 129,600 cases located in Spain was conducted. The results showed that heating systems are the best option to perform thermal transmittance tests, whereas air conditioning systems do not guarantee appropriate test conditions. As for the energy consumption and the percentage of hours with an appropriate thermal gradient, the adequacy of the heating setpoint temperature according to the predicted estimations of the external temperature during tests would mitigate their environmental impact. The reason is that, in certain cases, the increase of the setpoint temperature does not improve test conditions. Also, the use of heating systems would imply short test durations. Finally, the selection of small rooms with a small façade length would reduce the percentage of CO2 emissions between 31.37% and 36.1%. The results of this study could guarantee a more sustainable performance of thermal transmittance tests. In addition, the results could be used to perform life cycle analysis on buildings where thermal transmittance tests are performed.

Economic Analysis of Solar Energy/Air Compound Source Heat Pump System

2011 ◽  
Vol 130-134 ◽  
pp. 1605-1608
Author(s):  
Tao Liu ◽  
Zhi Gang Zhang ◽  
Wei Zhang
Keyword(s):  
Solar Energy ◽  
Economic Analysis ◽  
Heat Pump ◽  
Air Conditioning ◽  
Evaluation Criteria ◽  
System Model ◽  
Pump System ◽  
Heat Pump System ◽  
Heating Systems ◽  
Air Source Heat Pump

The foundation, principle and prior condition and engineering economic Evaluation Criteria of engineering economic analysis are introduced. The economy for a solar energy/air source heat pump system is analyzed. Through a single air-cooled heat pump system, air conditioning in summer + winter heating systems, solar / air source compound heat pump system model analysis and comparison of three systems, integrated initial investment and running costs of both, come to solar / air source compound heat pump system has certain advantages in economical efficiency.

Expansion Tank Structural Reconstruction for Central Heating Systems With Re-Engineering Consideration and Energetic Losses Minimization

2015 ◽  
Author(s):  
Hamed Mohsenian ◽  
Hossein Ghadamian ◽  
Ali Asghar Hamidi ◽  
Karim Alizad
Keyword(s):  
Air Conditioning ◽  
Experimental Models ◽  
Efficient Design ◽  
Heating Systems ◽  
Central Heating ◽  
Proposed Model ◽  
Energy Auditing ◽  
Proper Design ◽  
Air Conditioning Systems ◽  
Energy Survey

Open expansion tanks are applied vastly in central heating and air-conditioning systems. Central heating systems are subjected to great deals of energy losses, owing to the lack of proper design. In this paper, the structure of Open Expansion Tanks is revised and some modifications for reducing energy and heat loss are made to their elements. Moreover, some common designs available in the market are studied in order to better recognize their defects and capabilities. To reach an efficient design, several scenarios are tested using Computational methods (CFD based). In order to validate the new design, an experimental model was created and heat and energy survey operations were performed. The results of energy auditing were analyzed to show the convergence of numerical and experimental models. Additionally, the proposed model was economically evaluated. The final presented model named “Optimized OET with twin containers” is capable of reducing the energy loss by 85 to 95 percent.

System performance and economic assessment of a thermal energy storage based air-conditioning unit for transport applications

2019 ◽  
Vol 251 ◽  
pp. 113254 ◽  
Author(s):  
Binjian Nie ◽  
Xiaohui She ◽  
Zheng Du ◽  
Chunping Xie ◽  
Yongliang Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
System Performance ◽  
Air Conditioning ◽  
Economic Assessment

scholarly journals Aqua Power Generating Silencer

2020 ◽  
Vol 9 (7) ◽  
pp. 656-662
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxides ◽  
Urban Communities ◽  
Air Conditioning ◽  
Waste Heat ◽  
Heating Systems ◽  
Air Contamination ◽  
Sources Of Pollution ◽  
Different Sources ◽  
World Development

Management of Air contamination is most significant issue from the general public health of view, because each distinctive individual breaths around 22000 times each day. Air contamination causes around 7,000,000 deaths per year around the world. Development and convergence of the population in urban communities, just as the manner by which we consume various sources of energy in urban zones through transport or air conditioning and heating systems, among others, causes the emission of harmful gases at huge quantity that are dangerous to people health. Automobile vehicles are a significant pollution contributor, delivering critical measures of carbon monoxide, nitrogen oxides, and other contamination. In 2013, transportation contributed the greater part of the carbon monoxide (CO) and nitrogen oxides (NOx), and one-fourth of the hydrocarbons (HC) emitted into atmosphere. These vehicles don't seem to be the only sources of pollution, different sources like power generating stations, Exhaust from industries and factories, refuse burning etc. and also contribute intensely to defilement of our environment. So it is crucial that serious endeavors should be made to protect our environment from degradation. In the present study an Aqua Power Generating Silencer is an attempt, in this direction; it is mainly dealing with control of emission, noise & recovery of waste heat from exhaust gases to generate electricity.

Sign in / Sign up

Export Citation Format

Share Document