PV Example

This example calculates the environmental impacts of a photovoltaic panel product system for 1 m^2 of its declared reference flow. It uses the service’s bundled BONSAI background and all 25 configured EF3.1 methods.

Example Records

The records are included in the repository:

The example supplies the foreground through the same CE-RISE input records as any other assessment. Background data, characterization factors, and project preparation are provided by the service.

Send the Request

Start the calculator using Deployment. These commands use its local address, http://127.0.0.1:8081, and require jq. The schema versions in the request must be registered in HEX Core. Run the commands from the repository root:

jq -n \
  --slurpfile system tests/fixtures/pv/product-system.json \
  --slurpfile inventory tests/fixtures/pv/lci-dataset.json \
  '$system[0].reference_flow_specification as $reference |
  {
    model_versions: {
      product_system: "0.0.1",
      lci_dataset: "0.0.1",
      integrated_lca: "0.2.0"
    },
    product_system: $system[0],
    lci_datasets: [$inventory[0]],
    functional_unit: {
      reference_flow_identifier: $reference.reference_flow_identifier,
      quantity: 1.0,
      unit: $reference.reference_flow_unit_reference
    }
  }' > compute-request.json

curl --fail-with-body --silent --show-error \
  -H 'Content-Type: application/json' \
  --data-binary @compute-request.json \
  --output compute-result.json \
  http://127.0.0.1:8081/compute

The response in compute-result.json is the complete Integrated LCA object. It contains one analysis instance and 25 indicators calculated from one inventory.

Inspect the Results

Count the returned indicators:

jq '.lca_analysis_instances[0].assessment_results.assessment_indicators | length' \
  compute-result.json

The result is 25. To list each indicator with its value and unit:

jq -r '.lca_analysis_instances[0].assessment_results.assessment_indicators[] |
  [.indicator_identifier, .indicator_result.numeric_value, .indicator_result.unit] | @tsv' \
  compute-result.json

The saved result includes the following values, rounded here for readability. All values refer to the same 1 m^2 functional unit:

The complete result record contains every indicator, its method and factor-set reference, the functional unit, input references, background identification, software versions, and calculation timestamp.

See Methods and Background for interpretation of categories and subcategories and Testing for numerical regression and schema-validation checks.