{ "dataset_version": { "id": 3, "label": "v1.0 initial research build", "sha256": "39b09a298de0018be3f245e1a6765062fd7bd70f46ed2f97bf0e992b4d0a7666", "created_at": "2026-09-25 15:42:32" }, "material": { "id": "forest-residues", "category": "Forest residues", "feedstock": "Logging residues (tops and branches) from softwood final fellings", "product": "Wood fibre insulation board, dry process", "image": "forest-residues.jpg", "declared_unit": "1 m3 of installed wood fibre insulation board, 153 kg/m3", "density_kg_m3": 153, "summary": "Residues left at the landing are chipped and hauled to a fibreboard plant, defibrated, dried, mixed with PMDI and paraffin, and pressed into low-density boards.", "params": [ { "id": "rho", "label": "Board density", "value": 153, "unit": "kg/m3", "status": "S", "dq": 2, "sources": [ "S25" ], "note": "STEICO dry-process EPD reference density." }, { "id": "fossil", "label": "Fossil share (binder + additives)", "value": 0.04, "unit": "mass fraction", "status": "P", "dq": 3, "sources": [ "S26" ], "note": "From a dry-process wood fibre EPD (TimberBoard)." }, { "id": "alloc", "label": "Allocation of forest operations", "value": "Harvest burdens allocated to stemwood; residues burden-free at the landing", "unit": "", "status": "A", "dq": 3, "sources": [ "S47" ], "note": "Methodological choice; see sensitivity in the gap register." } ], "scale": [ { "basis": "DU", "value": 1, "label": "per declared unit" }, { "basis": "bdt", "value": 0.14688, "label": "bone-dry tonnes residue per DU", "status": "D", "note": "= 0.96 x 153 kg" } ], "processes": [ { "id": "res-01", "module": "A1", "stage": "Forest operations", "name": "Stemwood harvest (residues generated)", "description": "Felling and processing produce tops and branches at the landing.", "flows": [ { "id": "f1", "flow": "Harvest burden allocated to residues", "amount": 0, "unit": "L", "basis": "DU", "ef": "diesel_nr", "status": "A", "dq": 3, "sources": [ "S47" ], "note": "Allocation choice: burdens stay with stemwood.", "kind": "input" } ] }, { "id": "res-02", "module": "A1", "stage": "Residue handling", "name": "Seasoning on site", "description": "Residues left 3-12 months to dry and drop needles (nutrient retention).", "flows": [ { "id": "f1", "flow": "No energy input", "amount": 0, "unit": "-", "basis": "DU", "ef": null, "status": "I", "dq": 3, "sources": [], "note": "", "kind": "info" } ] }, { "id": "res-03", "module": "A1", "stage": "Residue handling", "name": "Forwarding, chipping at landing and haul (48 km)", "description": "Combined value for recovery, chipping and haul.", "flows": [ { "id": "f1", "flow": "Diesel, forwarding + chipper + haul", "amount": 8.1, "unit": "L", "basis": "bdt", "ef": "diesel_nr", "status": "S", "dq": 3, "sources": [ "S27", "S28" ], "note": "Includes 48 km haul (part of A2).", "kind": "input", "range": [ 8.1, 12 ] } ] }, { "id": "res-04", "module": "A1", "stage": "Residue handling", "name": "Nutrient compensation (wood-ash recycling)", "description": "Optional return of ash to compensate nutrient export.", "flows": [ { "id": "f1", "flow": "Ash spreading", "amount": null, "unit": "-", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "res-05", "module": "A1", "stage": "Field emissions", "name": "Soil carbon effect of residue removal", "description": "", "flows": [ { "id": "f1", "flow": "SOC change", "amount": null, "unit": "kg CO2", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "Report under GWP-luluc when quantified.", "kind": "input" } ] }, { "id": "res-06", "module": "A2", "stage": "Transport", "name": "Additional haul to board plant", "description": "Haul beyond the 48 km already in res-03.", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": 0, "unit": "t.km", "basis": "DU", "ef": "truck", "status": "A", "dq": 4, "sources": [ "S38" ], "note": "Set > 0 for plants further than 48 km.", "kind": "input" } ] }, { "id": "res-06b", "module": "A2", "stage": "Transport", "name": "PMDI and paraffin to the fibre plant", "description": "Inbound road freight of fossil additives.", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": 3.06, "unit": "t.km", "basis": "DU", "ef": "truck", "status": "A", "dq": 4, "sources": [ "S38" ], "note": "= 6.12 kg x 500 km (assumed supplier distance).", "kind": "input", "range": [ 1.224, 6.12 ] } ] }, { "id": "res-07", "module": "A3", "stage": "Fibre plant", "name": "Chip screening and washing", "description": "Removal of stones and fines.", "flows": [ { "id": "f1", "flow": "Electricity", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "res-08", "module": "A3", "stage": "Fibre plant", "name": "Thermo-mechanical defibration (refiner)", "description": "", "flows": [ { "id": "f1", "flow": "Electricity", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "res-09", "module": "A3", "stage": "Fibre plant", "name": "Fibre drying (flash tube dryer)", "description": "", "flows": [ { "id": "f1", "flow": "Heat", "amount": null, "unit": "MJ", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "res-10", "module": "A3", "stage": "Fibre plant", "name": "Binder and additive dosing", "description": "PMDI and paraffin emulsion.", "flows": [ { "id": "f1", "flow": "PMDI + paraffin", "amount": 6.12, "unit": "kg", "basis": "DU", "ef": null, "status": "P", "dq": 3, "sources": [ "S26" ], "note": "= 4% of 153 kg; EF not available.", "kind": "input" } ] }, { "id": "res-11", "module": "A3", "stage": "Fibre plant", "name": "Mat forming, steam-air preheating and pressing", "description": "", "flows": [ { "id": "f1", "flow": "Electricity + steam", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "res-12", "module": "A3", "stage": "Fibre plant", "name": "Cutting, profiling, packaging", "description": "", "flows": [ { "id": "f1", "flow": "Electricity + packaging", "amount": null, "unit": "-", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "res-13", "module": "A4", "stage": "Transport", "name": "Delivery to site", "description": "", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": 15.3, "unit": "t.km", "basis": "DU", "ef": "truck", "status": "A", "dq": 4, "sources": [ "S38" ], "note": "= 0.153 t x 100 km.", "kind": "input", "range": [ 7.65, 30.6 ] } ] }, { "id": "res-14", "module": "A5", "stage": "Installation", "name": "Cutting and fixing between studs / on sheathing", "description": "", "flows": [ { "id": "f1", "flow": "Fasteners, offcuts", "amount": null, "unit": "-", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] } ], "biogenic": { "dry_mass_kg": 146.88, "carbon_fraction": 0.5, "co2_kg": 269.28, "status": "D", "sources": [ "S45", "S26" ], "note": "Wood share 96% of 153 kg treated as dry mass." }, "info": [ { "label": "EPD range across densities", "value": "105 (140 kg/m3) to 135 (180 kg/m3) kg CO2e/m3 A1-A3", "note": "", "sources": [ "S25" ] } ], "benchmark": { "label": "STEICO dry-process EPD NEPD-10885-10885-2, GWP A1-A3", "value": 116, "unit": "kg CO2e/m3", "modules": "A1-A3", "use_for_residual": true, "sources": [ "S25" ], "note": "Feedstock is mainly sawmill/thinning softwood, not residues." } }, "results": { "total_fossil_gwp": 5.366040480000001, "range": [ 4.4646318, 8.7826896 ], "modules": { "A1": { "gwp": 3.7595404800000005, "lo": 3.6881568000000007, "hi": 5.5696896 }, "A2": { "gwp": 0.26775, "lo": 0.10709999999999999, "hi": 0.5355 }, "A3": { "gwp": 0, "lo": 0, "hi": 0 }, "A4": { "gwp": 1.3387499999999999, "lo": 0.6693749999999999, "hi": 2.6774999999999998 }, "A5": { "gwp": 0, "lo": 0, "hi": 0 } }, "biogenic_co2_stored": 269.28, "coverage": 0.25, "dq_weighted": 3.299382758290336, "residual": { "benchmark": 116, "modelled_a1_a3": 4.0272904800000004, "value": 111.97270952, "share_explained": 0.03471802137931035 } } }