...
TempHPColdSupplyMin = CoolingSP - 1;
(= minimal temperature in the cold thermal store for activation HP active cold supply)TempHPColdSupplyMax = CoolingSP +1;
(= maximal temperature in the cold thermal store for deactivation HP active cold supply)StorageHotMiddleAEHotReleaseOn = 60;
(= temperature at the middle of the hot thermal store when the dry cooler hot release is activated, in °C)StorageHotTopAEHotReleaseOff = 60;
(= temperature at the top of the hot thermal store when the dry cooler hot release is deactivated, in °C)StorageColdMiddleAEColdReleaseOn = 2;
(= temperature at the middle of the cold thermal store when the dry cooler cold release is activated, in °C)StorageColdTopAEColdReleaseOff = 2;
(= temperature at the top of the cold thermal store when the dry cooler cold release is deactivated, in °C)BTESColdDepositLimit = 9999999999999999;
BTESColdWithdrawLimit = 9999999999999999;
AEColdDepositLimit (= limited energy amount for cold deposit going in the BTES system, if this amount is crossed cold deposit won’t be allowed until the following year, in kWh)
BTESColdWithdrawLimit = 9999999999999999;
AEColdWithdrawLimit = 9999999999999999;
HPActiveColdDepositLimit = 9999999999999999;
Notices/Remarks
HT cooling + HT and LT heating separate
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HT cooling + HT and LT heating together
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LT heating + LT and HT cooling separate
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LT heating + LT and HT cooling together
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(= limited energy amount for cold withdraw going out of the BTES system, if this amount is crossed cold withdraw won’t be allowed until the following year, in kWh)
AEColdDepositLimit = 9999999999999999;
(= limited energy amount for cold deposit by the dry cooler, if this amount is crossed the dry cooler won’t be allowed to deposit cold anymore until the following year, in kWh)AEColdWithdrawLimit = 9999999999999999;
(= limited energy amount for cold withdraw by the dry cooler, if this amount is crossed the dry cooler won’t be allowed to withdraw cold anymore until the following year, in kWh)HPActiveColdDepositLimit = 9999999999999999;
(= limited energy amount for active cold deposit by the heat pump, if this amount is crossed the heat pump won’t be allowed to actively deposit cold anymore until the following year, in kWh)
Notices/Remarks
The system can be further optimised by doing sensitivity studies. For instance, a sensitivity study can be done for the size of the storage vessel or the thermal power of the HP and/or BTES system. To change the thermal power, the user should change the power spread found in the hybrid production configuration BC and/or the production BC’s. More information about hybrid production configurations and production BC’s can be found in Hybrid production Heating, Production Heating, Geothermal energy storage, Ambient exchange.
The user can change the design temperatures, thermal power, end units, etc. Keep in mind that the controls have to be changed as well. This can be done by changing the “settings” in the programmable controller which are listed in the top of the code. After changing the settings, the correct operation has to be checked again. The user should only change the “settings” and nothing else in the code to make sure the correct control strategy is still valid. If the user wants to change the control strategy, please contact our support team.
If the user changes the power of the end-units the thermal capacity of the boiler, chiller and heat pump doesn’t change automatically. The user should implement a correct capacity corresponded with the thermal power of the production units.
There are default COP and power tables for the heat pump, but these can be changed by the user.
The user can alter the template by deleting everything that’s not applicable in their case, but the basic components mentioned in the chapter “Working principle” still have to be there. The basic components are needed to make sure the control strategy is still valid. If the user deletes parts of the system, the control lines should be deleted as well. Otherwise, the system will give an error saying there are nodes not connected.
Geothermal energy storage systems are complex. If there are any more questions, please contact our support team.
HT cooling + HT and LT heating separate
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This template is the same as the previous template “BTES 1.0 - LT heating + HT cooling” except for the additional HT heating. The HT heating required is only supplied by the boiler, not by the heat pump.
HT cooling + HT and LT heating together
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This template is the same as the previous template “BTES 1.0 - LT heating + HT cooling” except for the additional HT heating. The HT heating required is both supplied by the heat pump as the boiler. This template is similar to the previous template “HT cooling + HT and LT heating separate”. The most optimal configuration between these two depends on the situation and should be simulated. If the return temperature of the HT heating is low enough for the heat pump, it might increase the contribution of the heat pump by combining the HT and LT heating.
LT heating + LT and HT cooling separate
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This template is the same as the previous template “BTES 1.0 - LT heating + HT cooling” except for the additional LT cooling. The LT cooling required is only supplied by the chiller, not by the BTES system or heat pump.
LT heating + LT and HT cooling together
...
This template is the same as the previous template “BTES 1.0 - LT heating + HT cooling” except for the additional LT cooling. The LT cooling required is both supplied by the BTES system as the chiller. This template is similar to the previous template “LT heating + LT and HT cooling separate”. The most optimal configuration between these two depends on the situation and should be simulated. If the return temperature of the LT cooling is high enough for the BTES system, it might increase the contribution of the BTES by combining the LT and HT cooling.
HT and LT heating separate + LT and HT cooling separate
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This template is a combination of “HT cooling + HT and LT heating separate” and “LT heating + LT and HT cooling separate”.
HT and LT heating together + LT and HT cooling separate
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This template is a combination of “HT cooling + HT and LT heating together” and “LT heating + LT and HT cooling separate”.
HT and LT heating separate + LT and HT cooling
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together
...
This template is a combination of “HT cooling + HT and LT heating
...
separate” and “LT heating + LT and HT cooling
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together”.
...
HT and LT heating
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together + LT and HT cooling together
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This template is a combination of “HT cooling + HT and LT heating together” and “LT heating
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+ LT and HT cooling
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together”.