Integrated System for Producing, Transporting and Consuming the Unconventional Energy for a Residential Building

2014 ◽  
Vol 659 ◽  
pp. 425-430 ◽  
Author(s):  
Cătălin George Popovici ◽  
Marius Costel Balan ◽  
Marina Verdeș ◽  
Vasilică Ciocan ◽  
Andrei Burlacu ◽  
...  
Keyword(s):  
Inflation Rate ◽  
Residential Building ◽  
Integrated System ◽  
Economic Effects ◽  
Hot Water ◽  
Domestic Hot Water ◽  
Natural Gases ◽  
In Series ◽  
The Cost ◽  
Service Duration

The possibility of incorporating several subsystems using successive, in parallel or combined links, in a complex system with a well-defined goal, has given the possibility of proposing a new model for the integrated system - in series – in order to assure the heating and domestic hot water independence of a residential building, and in order to use the Retscreen International software, to simulate its functioning. An integrated system, can be conformed in several ways, each scheme having some technological, organizatorical variants, but with different economic effects. In choosing the optimal variant of a category of installations, there are used some techniques of analysis the economic performance. In the simulation of the functioning of the integrated system which assures the heating and the domestic hot water there have been proposed a series of work parameters, namely: the destination of the building, the climatically zone, the demand of hot water, the medium demand of thermal energy concordant to the climatically zones, the cost of natural gases, the price of the wooden fuel, the inflation rate, the service duration of the equipment, the cost of system’s maintenance, etc.

scholarly journals Waste Heat Recovery from Servers Using an Air to Water Heat Pump

2021 ◽  
Vol 24 (1) ◽  
Author(s):  
Seweryn Lipiński ◽  
Michał Duda ◽  
Dominik Górski
Keyword(s):  
Heat Pump ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Hot Water ◽  
Coefficient Of Performance ◽  
Domestic Hot Water ◽  
Cooling Unit ◽  
Pump Inlet ◽  
The Cost

The analysis of advisability and profitability of using an air to water heat pump for the purpose of waste heat recovery from servers being used as cryptocurrency mining rigs, was performed. To carry out such an analysis, the cooling unit of the computing server was connected to the heat pump, and the entire system was adequately equipped with devices measuring parameters of the process. Performed experiments proves that the heat pump coefficient of performance (COP) reaches satisfactory values (i.e., an average of 4.21), what is the result of stable and high-temperature source of heat at the pump inlet (i.e., in the range of 29.9-34.1). Economic analysis shows a significant reduction in the cost of heating domestic hot water (by nearly 59-61%). The main conclusion which can be drawn from the paper, is that in a case of having a waste heat source in a form of a server or similar, it is advisable to consider the purchase of air-to-water heat pump for the purpose of domestic hot water heating.

scholarly journals Comparative Analysis of Energy Demand and CO2 Emissions on Different Typologies of Residential Buildings in Europe

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2436 ◽  
Author(s):  
Julià Coma ◽  
José Miguel Maldonado ◽  
Alvaro de Gracia ◽  
Toni Gimbernat ◽  
Teresa Botargues ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Co2 Emissions ◽  
Energy Demand ◽  
Residential Buildings ◽  
Residential Building ◽  
Cold Climate ◽  
Hot Water ◽  
Data Sources ◽  
Building Sector ◽  
Domestic Hot Water

The building sector accounts for one third of the global energy consumption and it is expected to grow in the next decades. This evidence leads researchers, engineers and architects to develop innovative technologies based on renewable energies and to enhance the thermal performance of building envelopes. In this context, the potential applicability and further energy performance analysis of these technologies when implemented into different building typologies and climate conditions are not easily comparable. Although massive information is available in data sources, the lack of standardized methods for data gathering and the non-public availability makes the comparative analyses more difficult. These facts limit the benchmarking of different building energy demand parameters such as space heating, cooling, air conditioning, domestic hot water, lighting and electric appliances. Therefore, the first objective of this study consists in providing a review about the common typologies of residential buildings in Europe from the main data sources. This study contains specific details on their architecture, building envelope, floor space and insulation properties. The second objective consists in performing a cross-country comparison in terms of energy demand for the applications with higher energy requirements in the residential building sector (heating and domestic hot water), as well as their related CO2 emissions. The approach of this comparative analysis is based on the residential building typology developed in TABULA/EPISCOPE projects. This comparative study provides a reference scenario in terms of energy demand and CO2 emissions for residential buildings and allows to evaluate the potential implementation of new supply energy technologies in hot, temperate and cold climate regions. From this study it was also concluded that there is a necessity of a free access database which could gather and classify reliable energy data in buildings.

scholarly journals Analysis and simulation of the circulation pump operation

2019 ◽  
Vol 116 ◽  
pp. 00022
Author(s):  
Michał Fijewski ◽  
Iwona Polarczyk ◽  
Joanna Paduchowska
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Measurement Data ◽  
Residential Building ◽  
Hot Water ◽  
Operation System ◽  
Actual Measurement ◽  
Pump Operation ◽  
Domestic Hot Water ◽  
Circulation Pump

The operation of the circulation installation has a significant impact on the energy efficiency of the building and it contributes to its reduction. The article refers to the actual measurement data obtained from the measurements of the domestic hot water (DHW) preparation system in a multi-family residential building in Wroclaw. On their basis, various possibilities of controlling the operation of the circulation installation without reducing the comfort of DHW operation system were presented and simulated. The results are illustrated in the form of measurable savings in energy consumption and related costs.

scholarly journals Analysis of the scope of thermo-modernization for a residential building in order to transform it into a low-energy building

2018 ◽  
Vol 44 ◽  
pp. 00069 ◽  
Author(s):  
Maciej Knapik
Keyword(s):  
Energy Demand ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Design ◽  
Primary Energy ◽  
Hot Water ◽  
Low Energy ◽  
Existing Building ◽  
Domestic Hot Water ◽  
Modernization Process

The article presents the problem of thermo-modernization and the reduction of energy demand for heating purposes in existing residential buildings. The thermo-modernization process has to adapt the existing building to the standard of a building with low energy demand and applicable regulations. Low-energy constructions are a result of introduction of new solutions in building design process. Their main objective is to achieve a significant reduction in demand for renewable primary energy, necessary to cover the needs of these buildings, mostly related to their heating, ventilation and domestic hot water. The article presents the results of the analysis and calculation of selected thermo-modernization variants. The results showed that thermo-modernization process of existing residential buildings is justified both energetically and economically.

scholarly journals Energy flexibility potential of domestic hot water systems in apartment buildings

2021 ◽  
Vol 246 ◽  
pp. 11005
Author(s):  
Åse Lekang Sørensen ◽  
Harald Taxt Walnum ◽  
Igor Sartori ◽  
Inger Andresen
Keyword(s):  
Energy Use ◽  
Economic Consequences ◽  
Hot Water ◽  
Spot Price ◽  
Base Case ◽  
Domestic Hot Water ◽  
Apartment Buildings ◽  
Control Options ◽  
Tariff Structure ◽  
The Cost

Domestic Hot Water (DHW) storage tanks are identified as a main source of flexible energy use in buildings. As a basis for energy management in apartment buildings, this paper describes the aggregated DHW use in a case building, and analyses the potential for DHW energy flexibility by simulating different control options. The case study for the work is an apartment building in Oslo with 56 apartments and a shared DHW system. Energy measurements are available for consumed hot water, hot water circulation, and energy supplied to the DHW tanks. The measurements are presented with minute, hourly and daily values. Aggregated daily energy use for the consumed hot water is in average 362 kWh, while the energy supplied is 555 kWh. The potential for energy flexibility is analysed for a base case and for four different rule-based control options: Power limitation, Spot price savings, Flexibility sale and Solar energy. Economic consequences of the control options are compared. With the Norwegian tariff structure, maximum hourly power use has the main impact on the cost. Control systems that aim to reduce the maximum power use may be combined with spot price savings or to offer end-user flexibility services to the grid.

scholarly journals The Economic Feasibility of Solar Home Heating Systems in New England

1979 ◽  
Vol 8 (2) ◽  
pp. 231-242
Author(s):  
Thomas H. Stevens ◽  
Matthew H. Baker ◽  
Steven Beyerlein
Keyword(s):  
New England ◽  
Economic Feasibility ◽  
Hot Water ◽  
Single Family ◽  
Domestic Hot Water ◽  
Solar Systems ◽  
Water Heaters ◽  
Home Heating ◽  
Cost Competitiveness ◽  
The Cost

Since the 1973 oil embargo, substantial interest has focused upon the question of the cost competitiveness of solar space heating and domestic hot water systems for single family residences. As early as 1974, national surveys indicated that homeowners were seriously considering the use of solar systems (National Science Foundation). At the present time, several New England electric companies (Massachusetts Electric, Granite State and Narragansett) are testing commercially available solar domestic hot water heaters in 100 New England homes. Yet, the question of the cost competitiveness of solar systems remains unresolved. For example, a recent study by the Massachusetts Energy Policy Office suggests that solar systems are currently cost competitive with electric resistance heating in the Boston area. The interim findings reported by consultants to the New England Electric Companies conclude that “Solar energy is a victim of unreasonably high expectations … and that several problems must be resolved if solar domestic hot water heaters are to become economically viable.” (Little, p. 3). A number of other studies have also arrived at conflicting results (Bezdek, et al; G. Lof and R. Tybout; W.D. Schulze, et al).

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