P20
The baseline for assessing the DH&C solution in the city district will be individual heat pumps for heating and individual chillers for cooling. In the table below, we see the main data of the DH&C system with ATES, heat and cold water storage tanks and a heat pump for co-generation of heat and cold. The electricity consumption for cooling can be optimized with the cold water storage tank, and the electricity consumption for heating can be optimized and interrupted with the heat storage and the gas boiler.
Figure 6 Heat production and storage
In Fig. 7 below we see the heat production and storage capacity for the whole year.
Table 1 Data for the DH&C solution
The table below shows the total investments in the baseline and the DH&C solution.
Figure 7 Annual solar heat and storage capacity
We can also see that the solar heating uses the storage from April to September.
The case illustrates that the DH companies that have the same opportunities as Gram could establish a similar production and storage facilities. Case 2 New urban development But what if there is no DH&C? Will it be profitable to establish a new system, and can the value of a virtual battery and economies of scale justify investments in the DH&C grids? There is no simple answer. It depends on the building density and the climate as well as the local energy policy, instruments to implement it and consumer incentives to co-operate. We have looked at a typical urban development district in a Danish municipality. It has a mix of commercial, residential buildings and a new hospital. The total land area is 1.8 million m2. The total heated floor area will be 660,000 m2, of which 470,000 m2 is expected to have a cooling demand. The capacity demand at building level is 14 MW for heating and 13 MW for cooling.
Table 2 Investments in DH&C solution and baseline
We can see that the total investments in the baseline and in the DH&C alternative are roughly the same. In other words, the virtual electricity storage is made available, in principle, at no additional investment cost. The additional benefits of operating the storage as well as reduced energy and maintenance costs, due to economies of scale, will create an economic incentive for the municipality, the developer and the building owners to look for DH&C. References: https://stateofgreen.com/en/profiles/ramboll https://ec.europa.eu/jrc/en/publication/efficient-district-heating-and-cooling- markets-eu-case-studies-analysis-replicable-key-success
For further information please contact:
Ramboll Att.: Anders Dyrelund
Phone: +45 51618766 ad@ramboll.dk
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