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Table 3 Optimal scenarios with changed side parameters and results

From: Smart energy systems for smart city districts: case study Reininghaus District

Scenario Changed parameter Cost variation (purchase) Result
ID Name Description Building standard Up or down to Value added per year (all quarters) Value added per year (quarters 1, 4 and 4a)
0a Baseline No additional changes OIB 416,000 €/year 84,000 €/year
0b Baseline No additional changes NZE 286,000 €/year 21,000 €/year
1a Natural gas Increased+/reduced* natural gas energy price OIB € 57+/€ 47* 358,000 €/year+ 91,000 €/year*
1b Natural gas Increased+/reduced* natural gas energy price NZE € 51+/€ 45* 259,000 €/year+ 24,000 €/year*
2a District heat Reduced district heat cost OIB € 51/€ 56 395,000 €/year 74,000 €/year
2b District heat Reduced district heat cost NZE € 50/€ 51 270,000 €/year 18,000 €/year
3a PV Reduced PV feed-in tariff OIB € 89 375,000 €/year 80,000 €/year
3b PV Reduced PV feed-in tariff NZE € 89 245,000 €/year 16,000 €/year
4a CHP Increased CHP feed-in tariff OIB € 74/€ 80 424,000 €/year 88,000 €/year
4b CHP Increased CHP feed-in tariff NZE € 75/€ 91 316,000 €/year 26,000 €/year
5a Economic and ecological optimum No energy cost for purchasing cooling water from deep water well OIB € 0 641,000 €/year 193,000 €/year
5b Economic and Ecological Optimum No energy cost for purchasing cooling water from deep water well NZE € 0 525,000 €/year 98,000 €/year
6a Waste heat limitation Availability of waste heat just from Marienhütte Stahlwerk OIB 417,000 €/year 74,000 €/year
6b Waste heat limitation Availability of waste heat just from Marienhütte Stahlwerk NZE 282,000 €/year 17,000 €/year
7a Autonomy heat No external energy for heating OIB 363,000 €/year 85,000 €/year
7b Autonomy heat No external energy for heating NZE 261,000 €/year 21,000 €/year
8a Autonomy heat and electricity No external energy for heating and electricity OIB Not possible with just 1 % space on roofs for PV Not possible with just 1 % space on roofs for PV
8b Autonomy heat and electricity No external energy for heating and electricity NZE Not possible with just 1 % space on roofs for PV Not possible with just 1 % space on roofs for PV
  1. Energy price purchase cost for energy only without infrastructure cost etc., €/year euros/year; OIB low energy house standard, NZE passive house standard
  2. +increased energy price*decreased energy price