CONVERSION / STORAGE PROCESS

Conversion/storage process - title

Conversion/Storage Process Component Model

Conversion/storage process - overview

Model Overview

Author / organization: S.Seidelt, D.Fehrenbach / EIFER

Domain:

Thermal storage
Energy conversion device

Intended application: Optimization of the overall energy system costs

Modelling of spatial aspects: Lumped (single device)

Model dynamics: Static

Model of computation: To be used by an optimization algorithm, Hourly steps of pivot years over a long-term planning horizon (for ex. 20-40 years)

Functional representation: Explicit

Conversion/storage process - input and output

Input and Output

Input variables :

Real VarICAP_Y,P: invested capacity at period Y of a process P [MW]
Real VarCOM_Y,S: amount of commodity C produced/consumed
Real FOPEX: fixed operational expenditures [€/(MW*a)]
Real VOPEX: Variable operational expenditures [€/MWh]
Real CAPEX: capital expenditure [€/MWp]
Real IMPEX: Import/Export costs of a commodity
Real Lifespan: Technical Lifetime [y]
Real ?: discount rate [%]

Output variables:

Real VarCost_C,Y,S,P: cost of commodity C produced/consumed by the process P at the time slice S of the period Y [M€]
Real Total_costs: total costs of the overall system [M€]

Thermal building - related documents

Related Documents

D4-1 Definition of a minimal set of component models.pdf

Conversion/storage process - description

Short Description

A process describes a physical element transforming one (or more) commodities into one (or more) other commodities.

incoming commodity flow(s): gas/heat/electricity
outgoing commodity flow(s): heat/electricity

Can be used as:

gas boiler: Gas >>> heat
gas CHP: Gas >>> heat & electricity
heat pump: heat & electricity >>> heat
heat storage: heat >>> heat

The models are used for the optimization of the overall energy system costs. Each model is part of the available technology portfolio within the system; those heat and electricity demand is provided by the technology portfolio (and under additional boundary conditions). The lowest possible time resolution is one hour, but daily, monthly or yearly resolution is also often used. The scale is on the district level. In this model, the battery is considered as a single lumped component, which provides a certain power or stores a defined amount of energy according to supply and demand.

Present use / development status

As a “component model”, a process in ETEEM provides the costs related to commodity transformation process under the given constraints (e.g. capacity constraints, demand needs, CO2 limitations).

Media Gallery

Conversion/storage process

Model Details

Classification

Domain		thermal storage energy conversion device
Intended application (including scale and resolution)		The models are used for the optimization of the overall energy system costs. Each model is part of the available technology portfolio within the system; those heat and electricity demand is provided by the technology portfolio (and under additional boundary conditions). The lowest possible time resolution is one hour, but daily, monthly or yearly resolution is also often used. The scale is on the district level.
Modelling of spatial aspects		lumped (single device) The battery is considered as a single lumped component, which provides a certain power or stores a defined amount of energy according to supply and demand.
Model dynamics		static The model outputs are assumed to be constant within one hour, but changes during a day/month/year.
Model of computation		other, please specify: to be used by an optimization algorithm Hourly steps of pivot years over a long-term planning horizon (for ex. 20-40 years)
Functional representation		explicit The component model representation itself is explicit, whereas its usage in the overall optimization model is implicit (function of electricity, heat, CO2 emission, costs).

Mathematical Model

Input variables (name, type, unit, description)		Real VarlCAP_y,p:invested capacity at period Y of a process P [MW] Real VarCOM_y,s:amount of commodity C produced/consumed by the process P at the time slice S of the period Y [MWh] Real FOPEX: fixed operational expenditures [€/(MWa)]* Real VOPEX: Variable operational expenditures [€/MWh] Real CAPEX: capital expenditure [€/MWp] Real IMPEX: Import/Export costs of a commodity Real Lifespan: Technical Lifetime [y] Real δ: discount rate [%]
Output variables (name, type, unit, description)		Real VarCost_C,Y,S,P: cost of commodity C produced/consumed by the process P at the time slice S of the period Y [M€] Real Total_costs: total costs of the overall system [M€]
Parameters (name, type, unit, description)		Real EffFLO_P,C: efficiency of Process P for Commodity C [%]
Internal variables (name, type, unit, description)		-
Internal constants (name, type, unit, description)		Indices: Y: year S: time slice P: process Y: year C: commodity
Model equations		Governing equations

		Constitutive equations

Initial conditions		-
Boundary conditions		commodity balance (demand satisfaction) equation storage balance (evolution between two time slices; aquifer assumed to be unlimited capacity capacity utilisation equation depending on scenario: equations describing legislative / CO2 maximum / self-consumption constraints)