Flexible Load Management: How DSOs can benefit from energy efficiency plugs for hot water management

2021 ◽  
Author(s):  
D. F. M. Tavares ◽  
M. B. Gough ◽  
T. A. S. Bandeira ◽  
B.P. A. Coutinho ◽  
H. M. P. Severino ◽  
...  
Keyword(s):  
Water Management ◽  
Energy Efficiency ◽  
Hot Water ◽  
Load Management ◽  
Flexible Load

Revised hydrogeological model of the hydrothermal system Waiwera (New Zealand)

2021 ◽  
Author(s):  
Andreas Grafe ◽  
Thomas Kempka ◽  
Michael Schneider ◽  
Michael Kühn
Keyword(s):  
Water Management ◽  
New Zealand ◽  
Water Level ◽  
Hot Water ◽  
Hydrogeology Journal ◽  
Natural State ◽  
Geothermal System ◽  
Geological Model ◽  
Species Transport ◽  
Study Region

<p>The geothermal hot water reservoir underlying the coastal township of Waiwera, northern Auckland Region, New Zealand, has been commercially utilized since 1863. The reservoir is complex in nature, as it is controlled by several coupled processes, namely flow, heat transfer and species transport. At the base of the aquifer, geothermal water of around 50°C enters. Meanwhile, freshwater percolates from the west and saltwater penetrates from the sea in the east. Understanding of the system’s dynamics is vital, as decades of unregulated, excessive abstraction resulted in the loss of previously artesian conditions. To protect the reservoir and secure the livelihoods of businesses, a Water Management Plan by The Auckland Regional Council was declared in the 1980s [1]. In attempts to describe the complex dynamics of the reservoir system with the goal of supplementing sustainable decision-making, studies in the past decades have brought forth several predictive models [2]. These models ranged from being purely data driven statistical [3] to fully coupled process simulations [1].<br><br>Our objective was to improve upon previous numerical models by introducing an updated geological model, in which the findings of a recently undertaken field campaign were integrated [4]. A static 2D Model was firstly reconstructed and verified to earlier multivariate regression model results. Furthermore, the model was expanded spatially into the third dimension. In difference to previous models, the influence of basic geologic structures and the sea water level onto the geothermal system are accounted for. Notably, the orientation of dipped horizontal layers as well as major regional faults are implemented from updated field data [4]. Additionally, the model now includes the regional topography extracted from a digital elevation model and further combined with the coastal bathymetry. Parameters relating to the hydrogeological properties of the strata along with the thermophysical properties of water with respect to depth were applied. Lastly, the catchment area and water balance of the study region are considered.<br><br>The simulation results provide new insights on the geothermal reservoir’s natural state. Numerical simulations considering coupled fluid flow as well as heat and species transport have been carried out using the in-house TRANSport Simulation Environment [5], which has been previously verified against different density-driven flow benchmarks [1]. The revised geological model improves the agreement between observations and simulations in view of the timely and spatial development of water level, temperature and species concentrations, and thus enables more reliable predictions required for water management planning.<br><br>[1] Kühn M., Stöfen H. (2005):<br>      Hydrogeology Journal, 13, 606–626,<br>      https://doi.org/10.1007/s10040-004-0377-6<br><br>[2] Kühn M., Altmannsberger C. (2016):<br>      Energy Procedia, 97, 403-410,<br>      https://doi.org/10.1016/j.egypro.2016.10.034<br><br>[3] Kühn M., Schöne T. (2017):<br>      Energy Procedia, 125, 571-579,<br>      https://doi.org/10.1016/j.egypro.2017.08.196<br><br>[4] Präg M., Becker I., Hilgers C., Walter T.R., Kühn M. (2020):<br>      Advances in Geosciences, 54, 165-171,<br>      https://doi.org/10.5194/adgeo-54-165-2020<br><br>[5] Kempka T. (2020):<br>      Adv. Geosci., 54, 67–77,<br>      https://doi.org/10.5194/adgeo-54-67-2020</p>

scholarly journals TECHNICAL MEASURES TO DECREASE HEAT ENERGY CONSUMPTION OF FINAL CUSTOMER IN MULTI-APARTMENT BUILDINGS ACCORDING TO ENERGY EFFICIENCY DIRECTIVE / TECHNINĖS PRIEMONĖS, SKIRTOS MAŽINTI GALUTINIO VARTOTOJO ŠILUMINĖS ENERGIJOS VARTOJIMĄ DAUGIABUČIUOSE GYVENAMU

2015 ◽  
Vol 7 (4) ◽  
pp. 461-467 ◽  
Author(s):  
Romanas Savickas ◽  
Lauryna Savickienė ◽  
Juozas Bielskus
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Heat Energy ◽  
Hot Water ◽  
Individual Member ◽  
Technical Solution ◽  
Improve Energy Efficiency ◽  
Individual Member State ◽  
Decrease Energy Consumption ◽  
Heat Metering

Energy consumption in the world increases, so the measures in order to improve energy efficiency must be found. The aim of 2012/27/EU Energy Efficiency Directive targets is to decrease energy consumption for a final energy consumer by 1.5% every year, but there is no definition how these targets could be achieved by an individual member state. This article presents the analysis how these targets could be achieved by the means of individual heat metering by heat cost allocators for every flat thus decreasing an energy consumption for a final consumer. Statistical analysis of identical buildings with individual metering by heat cost allocators and without them is presented. Heat cost allocators do not decrease energy consumption by themselves, so this article presents a technical solution and a set of additional equipment, i.e. thermostatic valves, balance valves, hot water meters and remote data collection system that must be installed. The final results show that the targets of 2012/27/EU Energy Efficiency Directive in Lithuania can be reached, because the buildings with individual heat cost allocators consume about 20–30% less of heat energy. Pasaulyje energijos vartojimas auga, todėl turi būti rastos energetinio efektyvumo pagerinimo priemonės. 2012/27/ES Energijos Efektyvumo Direktyvos tikslas yra sumažinti galutinio energijos vartotojo energijos suvartojimą kasmet po 1,5 %, tačiau nėra nurodyta, kaip kiekviena valstybė narė šiuos tikslus galėtų įgyvendinti. Šis straipsnis pristato analizę, kaip šie tikslai galėtų būti pasiekti, kiekviename bute įrengiant individualios šilumos apskaitos šilumos daliklius, kad sumažėtų energijos vartojimas atskiruose butuose. Pateikta statistinė identiškų pastatų su šilumos dalikliais ir be jų analizė. Šiluminei energijai taupyti neužtenka vien tik šilumos daliklių, todėl straipsnyje pateiktas techninis sprendimas – būtinų įdiegti techninių priemonių paketas, kurį sudaro tokios priemonės: termostatiniai ventiliai, balansiniai ventiliai, karšto vandens skaitikliai, belaidė reguliaraus duomenų nuskaitymo sistema. Galutiniai analizės rezultatai rodo, kad 2012/27/ES Energijos Efektyvumo Direktyvos tikslai Lietuvoje gali būti pasiekti, nes pastatai su individualia šilumos apskaita ir įrengtais šilumos dalikliais vartoja apie 20–30 % mažiau šiluminės energijos nei pastatai be tokios apskaitos.

scholarly journals Problems of energy-efficient construction in the Republic of Kazakhstan and the development of a methodology for determining the energy efficiency of buildings and structures

2020 ◽  
Vol 77 (4) ◽  
pp. 189-199
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Air Conditioning ◽  
Hot Water ◽  
Construction Sector ◽  
Progressive Development ◽  
Efficient Construction ◽  
New Construction ◽  
The Republic ◽  
Housing Facilities

The progressive development of the economy of the Republic of Kazakhstan is impossible without solving the issues of increasing energy efficiency and energy conservation. These issues are very relevant in the construction sector of Kazakhstan. Housing facilities, on average, consume 2-3 times more heat per square meter, than buildings in Europe. However, in Kazakhstan until now there is no methodology for determining the energy efficiency of buildings and structures that meets modern requirements. The methodology discussed in this article is harmonized with EU requirements and establishes a method for calculating the annual energy consumption of buildings for heating, hot water, ventilation and air conditioning, taking into account auxiliary energy for the operation of these systems, and is intended for use in the design of new construction, reconstruction (modernization) residential and public buildings, as well as operated buildings and structures.

scholarly journals Energy auditing and energy saving measures in 'Zastava Automobili' factory

2009 ◽  
Vol 13 (1) ◽  
pp. 185-193 ◽  
Author(s):  
Dusan Gordic ◽  
Milun Babic ◽  
Dubravka Jelic ◽  
Davor Koncalovic ◽  
Nebojsa Jovicic ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Feasibility Studies ◽  
Hot Water ◽  
Compressed Air ◽  
Energy Sources ◽  
Energy Costs ◽  
Energy Audit ◽  
Energy Auditing ◽  
Economical Feasibility

This paper deals with energy audit procedure implemented on only Serbian car manufacturer 'Zastava Automobili'. Based on the results of energy auditing and performed technological and economical feasibility studies several energy saving measures were proposed. The measures are related to different energy sources: steam, hot water, compressed air, electricity, and water. Such energy efficiency programs reduce energy costs and increase production profitability of the factory.

Modeling occupant behavior’s influence on the energy efficiency of solar domestic hot water systems

2022 ◽  
Vol 309 ◽  
pp. 118503
Author(s):  
Xin Zhou ◽  
Shuai Tian ◽  
Jingjing An ◽  
Da Yan ◽  
Lun Zhang ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Water Systems ◽  
Hot Water ◽  
Domestic Hot Water

The 3M Company

2017 ◽  
pp. 185-318
Keyword(s):  
Water Management ◽  
Health Care ◽  
Energy Efficiency ◽  
Patient Safety ◽  
Social Sustainability ◽  
Gas Emissions ◽  
Diverse Workforce ◽  
Global Challenges ◽  
The World ◽  
Environmental Goals

This chapter has a purpose to acknowledge 3M's greatest opportunity to overcome sustainability and transparency challenges which lies within innovation and collaboration. As a science company, 3M partners with its customers and communities to make the world cleaner, safer and stronger. Starting with technology and working toward the improvement of every life on the planet allows the company to think holistically about addressing global challenges. With an eye toward the future, 3M launched their 2025 sustainability goals. These goals range from investing in sustainable materials and energy efficiency to water management and helping the customers reduce their greenhouse gas emissions through the use of 3M products. 3M has also set goals around building a diverse workforce and worker and patient safety in health care and industrial settings. 3M continues to invest in developing products that help its customers reach their environmental goals, as well as increasing its social sustainability efforts.

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