Integration of 50 % wind power in a CHP-based ... - Ea Energianalyse

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Integration of 50 % wind power in a CHP-based ... - Ea Energianalyse

Economic Analyses 131With this being said, it is important to stress the fact that extraction units operating inbackpressure mode not automatically means that electricity generation is completelyconstrained by the heat. This is illustrated by Figure 7.5 below, showing a plot of theproduction in April and November both subjected to the wind penetration anno 2017, inwhich heat is alternately produced during backpressure- and bypass mode, respectively.Single‐unit bypass scenarioApril, 2017 November, 2017El.El.HeatHours where backpressure mode ismore optimal than BPO modeHeatFigure 7.5, Two months in 2017 – April and November - showing the production of asingle unit with BPO applied. The plots illustrate an example of heat produced in backpressuremode, deselecting the bypass mode.The implementation of central heat pumps ultimately results in a more scattered plot asseen in Figure 7.6 below, which is a consequence of the increasing demand on electricity.In addition to greater diversification, an increased amount of condensing electricity inJanuary, alongside with a great amount of co-generated heat produced in backpressuremode, is seen. An interesting tendency in the January heat pump scenario, is that theoptimal solution requires the two types of power plant producing energy separately theway they do it the best: by condensing- and backpressure mode, respectively (and notparticularly in between these operating modes). The production in May is very scatteredtoo, but characterized by a lower heat production than in January. A general thing, characterizingthe production under the inclusion of heat pumps, is the upper power limitbeing reached more frequently.

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