scholarly journals Determining the cost-effectiveness of thermal energy production by air-to-water heat pumps

2020 ◽  
Vol 880 ◽  
pp. 012047
Author(s):  
S I Kuzmin ◽  
N A Ivshina
Keyword(s):  
Cost Effectiveness ◽  
Thermal Energy ◽  
Energy Production ◽  
Heat Pumps ◽  
The Cost

scholarly journals Optimal Integration of Hydrogen-Based Energy Storage Systems in Photovoltaic Microgrids: A Techno-Economic Assessment

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4149
Author(s):  
Fabio Serra ◽  
Marialaura Lucariello ◽  
Mario Petrollese ◽  
Giorgio Cau
Keyword(s):  
Cost Effectiveness ◽  
Energy Production ◽  
Storage Systems ◽  
Storage System ◽  
Economic Assessment ◽  
Pv System ◽  
Hydrogen Storage System ◽  
Cost Of Energy ◽  
Expected Performance ◽  
The Cost

The feasibility and cost-effectiveness of hydrogen-based microgrids in facilities, such as public buildings and small- and medium-sized enterprises, provided by photovoltaic (PV) plants and characterized by low electric demand during weekends, were investigated in this paper. Starting from the experience of the microgrid being built at the Renewable Energy Facility of Sardegna Ricerche (Italy), which, among various energy production and storage systems, includes a hydrogen storage system, a modeling of the hydrogen-based microgrid was developed. The model was used to analyze the expected performance of the microgrid considering different load profiles and equipment sizes. Finally, the microgrid cost-effectiveness was evaluated using a preliminary economic analysis. The results demonstrate that an effective design can be achieved with a PV system sized for an annual energy production 20% higher than the annual energy requested by the user and a hydrogen generator size 60% of the PV nominal power size. This configuration leads to a self-sufficiency rate of about 80% and, without public grants, a levelized cost of energy comparable with the cost of electricity in Italy can be achieved with a reduction of at least 25–40% of the current initial costs charged for the whole plant, depending on the load profile shape.

Evaluation of Thermo-Active Foundations for Heating and Cooling Residential Buildings

2016 ◽  
Vol 138 (6) ◽  
Author(s):  
Byung Chang Kwag ◽  
Moncef Krarti
Keyword(s):  
Cost Effectiveness ◽  
Numerical Model ◽  
Simulation Analysis ◽  
Residential Buildings ◽  
Three Dimensional ◽  
Heat Pumps ◽  
Ground Source Heat Pumps ◽  
Heating And Cooling ◽  
Ground Source ◽  
The Cost

The application of thermo-active foundation (TAF) systems to heat and cool residential buildings is evaluated in this paper. First, a transient three-dimensional finite difference numerical model is developed for the analysis of thermo-active foundations. The numerical model predictions are then validated against experimental data obtained from laboratory testing. Using the validated numerical model, G-functions for TAFs are generated and integrated into whole-building simulation analysis program, energyplus. A comparative analysis is carried out to evaluate TAF systems compared to conventional ground-source heat pumps (GSHPs) to provide heating and cooling for multifamily residential buildings. In particular, the analysis compares the cost-effectiveness of TAFs and GSHPs to meet heating and cooling needs for a prototypical multifamily building in three U.S. climates. Due to lower initial costs associated to the reduced excavation costs, it is found that TAFs offer a more cost-effectiveness than GSHP systems to heat and cool multifamily residential buildings.

scholarly journals Evaluation of the effectiveness of the use of heat pumps of the “water-water” type in the wastewater disposal system of the building

2021 ◽  
Vol 311 ◽  
pp. 05001
Author(s):  
Sergey Kuzmin ◽  
Leonid Kudelkin
Keyword(s):  
Thermal Energy ◽  
Residential Buildings ◽  
Heat Pumps ◽  
Heat Consumption ◽  
System Of Equations ◽  
Water Type ◽  
Wastewater Disposal ◽  
Thermal Potential ◽  
The Cost

The paper presents the results of the analysis of the effectiveness of the use of heat pumps of the “water-water” type for the extraction of thermal energy from the wastewater of wastewater disposal systems of residential buildings. A system of equations characterizing the operation of heat pumps in the system - “drains-heat consumption” - is obtained. The thermal potential of the wastewater and the cost of the extracted energy were estimated.

Technical and Economic Characteristics of Solar Concentrating Modules With Louvered Heliostats

2021 ◽  
pp. 127-150
Keyword(s):  
Thermal Energy ◽  
Energy Production ◽  
High Efficiency ◽  
Flat Surface ◽  
Vertical Orientation ◽  
Angular Aperture ◽  
Cost Of Electricity ◽  
The Cost

The calculations confirm the high efficiency of using louvered heliostats. The maximum annual energy production by non-tracking solar concentrating modules is achieved with a vertical orientation of the concentrator, which is very important when placing solar modules on the southern facades of buildings. The annual amounts of insolation at the receiver for concentrators with a louvered heliostat with an angular aperture of 26° and 18°, respectively, are on average 2 and 3.4 times higher than the total insolation on a flat surface and 1,6 and 2,2 times higher than insolation by blind surface receiving concentrating modules with similar angular aperture values. The cost of electricity produced when using non-glare concentrating modules with louvre is reduced by 40–60% compared to concentrating modules without louver, and thermal energy by 50%.

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