--- title: Self-generating Heat and Electricity slug: self-generating-heat-and-electricity docTags: createdAt: 2024-11-18T15:53:30.926Z --- # Self Generated Electricity :::hint{type="info"} If your installation generates its own electricity, whether from renewable sources or a mix of fuels, you can represent this in the diagram and allocate the generated electricity to your production process(es). The emissions from your self-generated electricity will be added to your *indirect (Scope 2) emissions*. [How does the EU CBAM differ from the GHG Protocol rules?](docId\:D2ZsuoqnHQioQFUE5YQPU) ::: ## Add Self Generated Electricity :::::WorkflowBlock :::WorkflowBlockItem Right-click on the screen and select **Self-generating Heat and Electricity** **>** **Self Generated Electricity** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/4ryhBbiiKMsjWvJMA54Rt_image.png) ::: ::::WorkflowBlockItem Select the unit in either MWh or kWh :::hint{type="info"} The electricity emission factor is disabled because it will be automatically calculated once you connect any fuels used to produce your electricity. **If no fuels are connected, the emission factor (EF) will be 0 tCO2/MWh, indicating that you are using renewable energy.** ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/hWyUtO7P0wOrE2J28Bpdn_image.png) :::: :::WorkflowBlockItem Enter the **Quantity** of electricity generated ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/oTdJk-7ZbHX156YBeYIn2_image.png) ::: ::::WorkflowBlockItem If applicable, add any **Notes** :::hint{type="info"} For instance, if your self-generated electricity came from solar panels, specify this in the **Notes** field. ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/YBjgfYWkRstWxfuBA8kKk_image.png) :::: :::WorkflowBlockItem Click **Next** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/75_iJTO-ojZzwszUGGQ9J_image.png) ::: :::WorkflowBlockItem If applicable, add a **Fuel** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/gsAyziTLHcc_cfmwttFs3_image.png) ::: :::WorkflowBlockItem Click on the black dot at the edge of the **Fuel** and drag the line to connect it to one of the black dots on the **Self Electricity** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/FAr3bncLaS5IdtLot8Shr_image.png) ::: :::WorkflowBlockItem Enter the **Quantity **of **Fuel** you want to send to the **Self Electricity** unit ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/ndEZZxjhUY3cFWixX4RL2_image.png) ::: :::WorkflowBlockItem Click **Add** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/OItH-lC8n5Rd1TUrbInwc_image.png) ::: ::::WorkflowBlockItem Emissions are calculated based on the amount of fuel used to produce the electricity :::hint{type="info"} The example below consumed 5,000 m3 of natural gas in the power unit. The platform automatically performs the following calculation: 20,418.26 tCO2e / 10,000,000 m3 = 0.002042 tCO2e/m3 0.002042 tCO2e/m3 x 5,000 m3 = 10.21 tCO2e Electricity emission factor (EF) = 10.21 tCO2e / 1 MWh = 10.21 tCO2e/MWh ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/pw_e9EcIcKKvanfJ6pysE_image.png) :::: ::::: ## Edit Self Generated Electricity ::::WorkflowBlock :::WorkflowBlockItem Right-click on **Self Generated Electricity** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/w3py5Qx-3qM3LWURJ-EN5_image.png) ::: :::WorkflowBlockItem Click **Edit** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/EEg5v-IRLFxNCBLdYz6ik_image.png) ::: :::WorkflowBlockItem Click **Next **to save your changes ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/GXryHyjKN_ziJfLS3rk0O_image.png) ::: :::: ## Delete Self Generated Electricity ::::WorkflowBlock :::WorkflowBlockItem Right-click on **Electricity** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/w3py5Qx-3qM3LWURJ-EN5_image.png) ::: :::WorkflowBlockItem Click **Delete** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/EE2zRRU_u40OAJ7QzGEv0_image.png) ::: :::: # Central Heat Unit :::hint{type="info"} If your installation produces heat centrally and then distributes it to different production processes and/or subprocesses, you can reflect this on the diagram. Only measurable heat should be considered, i.e., heat that is transported through a heat medium such as steam, hot water, liquid salts, etc., and where its flow rate can be measured in pipes, ducts, or similar conduits. **Note**: If a production process produces or recovers heat and exports it to another process, the emissions from that heat will be deducted from the first process and attributed to the process consuming the heat. ::: ## Add Central Heat Unit :::::WorkflowBlock :::WorkflowBlockItem Right-click on the screen and select **Self-generating Heat and Electricity** **>** **Central Heat Unit** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/HKE2BKi7l38xao4rN16Ky_image.png) ::: :::WorkflowBlockItem Specify the **heat efficiency** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/_slSAW4jSStKatJWL1-XS_image.png) ::: :::WorkflowBlockItem If applicable, add any **Notes** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/81M21ADy_udPrIf0vYkdK_image.png) ::: :::WorkflowBlockItem Add a **Fuel** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/oh5n9Fj-7Vc7KFZzrHnWp_image.png) ::: :::WorkflowBlockItem Click on the black dot at the edge of the **Fuel** and drag the line to connect it to one of the black dots on the **Central Heat** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/YLxqGk7h0wZ03oMS6pdbq_image.png) ::: :::WorkflowBlockItem Enter the **Quantity** of **Fuel** you want to send to the **Central Heat** unit ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/6NtpcJG2h_nhUP128J-yy_image.png) ::: :::WorkflowBlockItem Click **Next** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/HAxnvSKI9e9NSq7FPVoyN_image.png) ::: ::::WorkflowBlockItem The amount of heat generated in the **Central Heat **unit will be automatically calculated using the net calorific value (NCV) of the fuel :::hint{type="warning"} You can connect multiple fuels to your central **Heat Unit**. ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/PfyETKzKfokLYN99IXxx9_image.png) :::hint{type="info"} In the example below, we used natural gas with a net calorific value (NCV) of 0.00003574 TJ/m³. Therefore, the platform performs the following calculation to determine the total quantity of heat generated: **0.00003574 TJ/m³ × 1,000,000 m³ = 35.74 TJ** The platform then accounts for the heat efficiency that was input, which in this example was 70%. Hence, the heat generated is calculated as: **35.74 TJ × 0.7 = 25.018 TJ** The emission factor for heat is calculated by dividing the total emissions associated with heat generation (in tCO₂e) by the total heat generated (in TJ): **2,041.83 tCO₂e ÷ 25.018 TJ = 81.6143 tCO₂e/TJ** ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/uTThkk2dVrHwaekIvMcct_image.png) :::hint{type="warning"} If you don't assign an NCV value to the fuel and connect it to the **Central Heat** unit, no heat quantity will be calculated, and as a result, you won't be able to attribute any heat to the production processes. ::: :::: :::WorkflowBlockItem Click on the black dot at the edge of the **Central Heat** and drag the line to connect it to one of the black dots on the **Production Process** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/QpD-7aYulw-bljyNTWy31_image.png) ::: :::WorkflowBlockItem Enter the quantity of heat you want to send to the production process ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/H_3LWOsr3Ul8Nw9skhjCv_image.png) ::: :::WorkflowBlockItem Click **Add** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/0ADPGZJgTSNRVZKPEIOla_image.png) ::: ::::WorkflowBlockItem The heat emissions are automatically allocated to the production process based on the amount of heat used in that specific production process :::hint{type="info"} In the example below, the entire amount of heat is consumed by the production process, so the total emissions from that heat are attributed to the production process. ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/5uXuUDtTTv3XL1z4xgfIA_image.png) :::: ::::: ## Edit Central Heat Unit ::::WorkflowBlock :::WorkflowBlockItem Right-click on **Central Heat** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/_3sB8yTbKIXs7imf-WCCA_image.png) ::: :::WorkflowBlockItem Click **Edit** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/a0S2wPXSFOO9EPrI9lkxN_image.png) ::: :::WorkflowBlockItem Click **Next **to save your changes ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/BXopYckuh4N8MmktsvG1M_image.png) ::: :::: ## Delete Central Heat Unit ::::WorkflowBlock :::WorkflowBlockItem Right-click on **Central Heat** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/_3sB8yTbKIXs7imf-WCCA_image.png) ::: :::WorkflowBlockItem Click **Delete** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/01M2WLQA8eCyYLNGfwMUM_image.png) ::: :::: # Combined Heat and Power (CHP) :::hint{type="info"} Combined heat and power (CHP), also referred to as "cogeneration", is the simultaneous generation of heat and power in a single integrated process. The heat produced from CHP is recovered for a useful heat consuming purpose in the form of hot water, steam or hot air, whilst the power output is usually electricity. ::: ## Add CHP :::::WorkflowBlock :::WorkflowBlockItem Right-click on the screen and select **Self-generating Heat and Electricity** **>** **Combined Heat & Power** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/pbGWxLW5DPvK9hiJaRScv_image.png) ::: ::::WorkflowBlockItem Specify the **Source of Values** :::hint{type="info"} What are the [average efficiencies](docId\:D2ZsuoqnHQioQFUE5YQPU)? ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/SnnWKgGVQhV0tz386xx7s_image.png) :::: ::::WorkflowBlockItem Specify the **Heat Reference Efficiency** :::hint{type="info"} What are the [reference efficiencies](docId\:D2ZsuoqnHQioQFUE5YQPU)? ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/3Nyxxw2U0CN02Y-k8y0ZB_image.png) :::: ::::WorkflowBlockItem Specify the **Electricity Reference Efficiency** :::hint{type="info"} What are the [reference efficiencies](docId\:D2ZsuoqnHQioQFUE5YQPU)? ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/SrugOXd933GJoxih4sJlr_image.png) :::: :::WorkflowBlockItem If applicable, add any **Notes** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/YcvFqJenR-Pi4GLoPKvNV_image.png) ::: :::WorkflowBlockItem Click **Next** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/Wy3qcbKBFGZFkYtUjyol__image.png) ::: ::::WorkflowBlockItem If applicable, add a **Fuel** :::hint{type="info"} You can also connect waste gas or heat. ::: ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/4-3dWTBsNC86YJOAvPCwf_image.png) :::: :::WorkflowBlockItem Click on the black dot at the edge of the **Fuel** and drag the line to connect it to one of the black dots on the **CHP** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/ESV_g2LJ54_lHBLXeXcPY_image.png) ::: :::WorkflowBlockItem Enter the **Quantity **of **Fuel** you want to send to the **CHP** unit ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/O6OpX6Bx5JtObrRXD6X9J_image.png) ::: :::WorkflowBlockItem Click **Add** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/bxW6731wRPSH5AFg_cfX6_image.png) ::: :::WorkflowBlockItem Emissions are automatically calculated using the [CHP equations](docId\:nMVRCWOq2rBDvKRVifvn_) ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/cfLhjH54oX7lMgFladu9M_image.png) ::: ::::: ## Edit CHP ::::WorkflowBlock :::WorkflowBlockItem Right-click on **CHP** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/DzAEmfeCBmxgBd7THYDRV_image.png) ::: :::WorkflowBlockItem Click **Edit** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/OGFxY-GVLyXct1MBKCFJQ_image.png) ::: :::WorkflowBlockItem Click **Next **to save your changes ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/Ws-yPUoUcKs6sTAIoOpEh_image.png) ::: :::: ## Delete CHP ::::WorkflowBlock :::WorkflowBlockItem Right-click on **CHP** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/DzAEmfeCBmxgBd7THYDRV_image.png) ::: :::WorkflowBlockItem Click **Delete** ![](https://api.archbee.com/api/optimize/x8OHL8j_3t12U2ealHN0O/dwdGYvIAY0gKrEM8dMjV4_image.png) ::: ::::