Improving CHP flexibility by integrating thermal energy storage and power-to-heat technologies into the energy system

Lepiksaar, Kertu; Mašatin, Vladislav; Latõšov, Eduard; Siirde, Andres; Volkova, Anna

doi:10.1016/j.segy.2021.100022

Cited by 45 publications

(17 citation statements)

References 34 publications

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“…Through energy and exergy analyses of the cogeneration mode, it is possible to increase electricity generation, improve heat load, and reduce heat loss in the DH network [6]. A review of the literature explores technical solutions aimed at improving the flexibility of CHP plants, considering the potential transition to 4th generation district heating, which improves efficiency and balances the thermal and electrical loads of CHP plants [7]. The importance of CHPs in the integrated energy sector was analysed in [8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of District Heating Supply Options for Different CHP Configurations

Rušeljuk¹,

Dedov

Hlebnikov

et al. 2023

Energies

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The article discusses the evaluation of potential heat production options for a large-scale district heating system in Narva (Estonia). Heat is currently generated at the Balti Power Plant’s CHP unit using local oil shale mixed with biomass. The CHP unit consists of two circulating fluidised bed boilers and a reheat steam turbine. According to the development strategy, the district heating system is expected to achieve carbon neutrality in the future. Various options and parameter variations should be analysed. The following scenarios were compared: (1) baseline scenario featuring an existing CHP extraction steam turbine; (2) alternative Scenario I featuring a CHP backpressure steam turbine; and (3) alternative Scenario II featuring a CHP gas turbine. To evaluate the above scenarios, a comprehensive energy/exergy analysis was performed, and economic indicators were calculated. The primary energy consumed, as well as the heat and electricity generated, were all taken into account. Based on this analysis, a scenario was selected using multiple-criteria decision-making that will improve energy efficiency and reliability of the system.

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Section: Introductionmentioning

confidence: 99%

Comparison of District Heating Supply Options for Different CHP Configurations

Rušeljuk¹,

Dedov

Hlebnikov

et al. 2023

Energies

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“…At the scale of a national energy network, these systems reduce the effects of peak loads and ensure continuous availability. They strengthen the energy independence of the network and the integration of intermittent renewable energies . CHP is a well-established technology for large-scale commercial and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Performance, Efficiency, and Flexibility Analysis of a High-Temperature Proton Exchange Membrane Fuel Cell-Based Micro-Combined Heat-and-Power System with Intensification of the Steam Methane Reforming Step by Using a Millistructured Reactor

Wu,

Commenge,

Fort

et al. 2023

ACS Omega

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The complete simulation model of an existing 1 kW high-temperature proton exchange membrane (HT-PEM) fuel cellbased residential micro-combined heat-and-power process, including a compact intensified heat-exchanger-reactor, is developed in the simulation software ProSimPlus v3.6.16. Detailed simulation models of the heat-exchanger-reactor, a mathematical model of the HT-PEM fuel cell, and other components are presented. The results obtained by the simulation model and by the experimental micro-cogenerator are compared and discussed. To fully understand the behavior of the integrated system and assess its flexibility, a parametric study is performed considering fuel partialization and important operating parameters. The values of the air-to-fuel ratio = [30, 7.5] and steam-to-carbon ratio = 3.5 (corresponding to net electrical and thermal efficiencies of 21.5 and 71.4%) are chosen for the analysis of inlet/outlet component temperatures. Finally, the exchange network analysis of the full process proves that the process efficiencies can still be increased by further improving the process internal heat integration.

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“…A comparison between different methods for the best design of distributed power systems was made in [11], where heat pumps were considered as a power-to-heat solution. A risk assessment for integrated heat and electricity systems was conducted in [12], which determined that the use of power-to-heat solutions (electric boilers and heat pumps) leads to reduced risks when a greater proportion of renewable energy sources is incorporated into the system [13].…”

Section: Introductionmentioning

confidence: 99%

Heat Pump Use in Rural District Heating Networks in Estonia

Lepiksaar

Kalme²,

Siirde

et al. 2021

Environmental and Climate Technologies

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District heating has proven to be an efficient way of providing space heating and domestic hot water in populated areas. It has also proven to be an excellent way to integrate various renewable energy sources (RES) into the energy system. In Estonia, biomass covers most of the heat demand, but carbon-intensive fuels are still used to cover peaks and lows. Heat pumps can be a good solution for rural areas, as there is usually plenty of land available for heat pump facilities. In addition, heat pumps require low-grade heat sources such as ambient air, groundwater, lakes, rivers, sea, sewage water, and industrial waste heat. One of the downsides of heat pumps is the need for large investments compared to boilers fired by natural gas and biomass, and electric boilers. This study examines the impact of heat pump use on consumer prices for district heating in rural district heating networks in Estonia.

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Improving CHP flexibility by integrating thermal energy storage and power-to-heat technologies into the energy system

Cited by 45 publications

References 34 publications

Comparison of District Heating Supply Options for Different CHP Configurations

Comparison of District Heating Supply Options for Different CHP Configurations

Performance, Efficiency, and Flexibility Analysis of a High-Temperature Proton Exchange Membrane Fuel Cell-Based Micro-Combined Heat-and-Power System with Intensification of the Steam Methane Reforming Step by Using a Millistructured Reactor

Heat Pump Use in Rural District Heating Networks in Estonia

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