Abandoning Peat in a City District Heat System with Wind Power, Heat Pumps, and Heat Storage

2021 ◽  
Author(s):  
Nima Javanshir ◽  
Sanna Syri ◽  
Antti Teräsvirta ◽  
Ville Olkkonen
Keyword(s):  
Wind Power ◽  
Heat Storage ◽  
Heat Pumps ◽  
Heat System ◽  
City District

Wind power integration using individual heat pumps – Analysis of different heat storage options

Energy ◽  
2012 ◽  
Vol 47 (1) ◽  
pp. 284-293 ◽  
Author(s):  
Karsten Hedegaard ◽  
Brian Vad Mathiesen ◽  
Henrik Lund ◽  
Per Heiselberg
Keyword(s):  
Wind Power ◽  
Heat Storage ◽  
Heat Pumps ◽  
Wind Power Integration

BUILDINGS AS ACTIVE COMPONENTS FOR GRID STABILITY

2017 ◽  
Vol 12 (4) ◽  
pp. 21-34
Author(s):  
Friedrich Sick ◽  
Ralph Füger
Keyword(s):  
Capital Investment ◽  
Heat Storage ◽  
Reactive Power ◽  
District Heating ◽  
Energy Transition ◽  
Heat Pumps ◽  
Raw Material ◽  
Analysis Tool ◽  
Active Components ◽  
Massive Structure

A successful energy transition depends on storage options in order to ensure power supply stability under a fluctuating generation of a growing share of renewable energies (RE). Battery storage is expensive and raw material intensive and therefore not suitable as a sole solution. Surplus electricity may easily be converted to heat, which can be stored inexpensively for a short term. With such simple Power-to-Heat or P2H solutions, lack of electric power cannot be offset by conventional heat storage. However, if a building or an urban quarter is heated by means of cogeneration, so-called Combined Heat and Power (CHP), or heat pumps (HP), the operation can be adjusted in such a way, that the building itself, i.e. its massive structure, serves as heat storage. Electricity generation and consumption is adjusted to the requirements of the grid (reactive power control). For the supply of a Berlin quarter, built in the 1950s and equipped with a district heating network and a CHP plant, the feasibility of the concept could be proved using dynamic building simulation as the analysis tool. Sixteen percent of the total heating consumption may useably be stored and extracted from the building structure. In absolute numbers: 73 MWh/a heat can be buffered corresponding to 34 MWh/a balancing electricity. For each square meter of living area, 3.7 kWh electrical balancing energy can be buffered in the building's thermal storage capacity. Nothing else is required than a re-programming of heating and possibly cooling controls. No capital investment is needed. Well insulated and more massive structures could show a proportion of 27% of such shifted heat.

scholarly journals Effect of Heat Demand on Integration of Urban Large-Scale Renewable Schemes—Case of Helsinki City (60 °N)

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2164
Author(s):  
Vahid Arabzadeh ◽  
Peter D. Lund
Keyword(s):  
Wind Power ◽  
Large Scale ◽  
Energy Use ◽  
Energy Systems ◽  
Energy System ◽  
Heat Pumps ◽  
Electricity Production ◽  
Population Increase ◽  
Building Energy Efficiency ◽  
Heat Demand

Heat demand dominates the final energy use in northern cities. This study examines how changes in heat demand may affect solutions for zero-emission energy systems, energy system flexibility with variable renewable electricity production, and the use of existing energy systems for deep decarbonization. Helsinki city (60 °N) in the year 2050 is used as a case for the analysis. The future district heating demand is estimated considering activity-driven factors such as population increase, raising the ambient temperature, and building energy efficiency improvements. The effect of the heat demand on energy system transition is investigated through two scenarios. The BIO-GAS scenario employs emission-free gas technologies, bio-boilers and heat pumps. The WIND scenario is based on large-scale wind power with power-to-heat conversion, heat pumps, and bio-boilers. The BIO-GAS scenario combined with a low heat demand profile (−12% from 2018 level) yields 16% lower yearly costs compared to a business-as-usual higher heat demand. In the WIND-scenario, improving the lower heat demand in 2050 could save the annual system 6–13% in terms of cost, depending on the scale of wind power.

scholarly journals Optimal Operation for Integrated Electricity–Heat System with Improved Heat Pump and Storage Model to Enhance Local Energy Utilization

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6729
Author(s):  
Yang Chen ◽  
Yao Zhang ◽  
Jianxue Wang ◽  
Zelong Lu
Keyword(s):  
Variable Mass ◽  
Clean Energy ◽  
Heat Pumps ◽  
Optimal Operation ◽  
Energy Utilization ◽  
Water Tank ◽  
Heat Network ◽  
Heat System ◽  
Guarantee System ◽  
Electricity Network

As the need for clean energy increases, massive distributed energy resources are deployed, strengthening the interdependence of multi-carrier energy systems. This has raised concerns on the electricity-heat system’s co-operation for lower operation costs, higher energy efficiency, and higher flexibility. This paper discusses the co-operation of integrated electricity–heat system. In the proposed model, network constraints in both systems are considered to guarantee system operations’ security: the branch flow model is utilized to describe the electricity network, while a convexified model considering variable mass flow and temperature dynamics is adopted to describe the heat network. Additionally, novel models for heat pumps and the stratified water tank are proposed to represent the physical system more accurately. Finally, to preserve the information privacy of separate systems, a distributed algorithm is proposed based on the alternating direction method of multipliers (ADMM). Numerical studies show that the co-operation could provide a more economical and reliable solution than the decoupled operation of the heat network and electricity network. Moreover, the ADMM-based algorithm could derive solutions very close to the optimum provided by centralized optimization.

Efficiency improvement of heat storage materials for MgO/H2O/Mg(OH)2 chemical heat pumps

2016 ◽  
Vol 162 ◽  
pp. 31-39 ◽  
Author(s):  
E. Mastronardo ◽  
L. Bonaccorsi ◽  
Y. Kato ◽  
E. Piperopoulos ◽  
C. Milone
Keyword(s):  
Heat Storage ◽  
Heat Pumps ◽  
Efficiency Improvement ◽  
Chemical Heat ◽  
Storage Materials ◽  
Heat Storage Materials
Sign in / Sign up

Export Citation Format

Share Document