Concept: Dairy parlour propane load profile
Dairy is propane's steady year-round livestock load — not as peaky as a poultry brooding event, but utterly intolerant of interruption. The Ontario Milk Act and Reg. 761 require defined sanitary standards; pickup is refused if CIP cleaning has not occurred to spec.
Confidence: Verified (temperature targets, run-out consequences); Estimated (consumption ranges).
Operational reference for propane consumption on Ontario dairy operations. Dairy is propane's steady year-round livestock load — not as peaky as a poultry brooding event, but utterly intolerant of interruption.
Heat uses and temperature targets
| Use | Target temperature | Notes |
|---|---|---|
| Pipeline / parlour CIP wash (main wash) | Start 71–77°C (160–170°F); return ≥49°C (120°F) | OMAFRA Raw Milk Specialist Mike Foran, Goat Gazette, June 2016 |
| Bulk-tank wash | Mirror parlour wash; start ≥77°C | Cleaned after every pickup |
| Calf milk warming | 38–40°C (100–104°F) at feeding | Body-temperature delivery; cold milk degrades abomasal performance |
| Calf-barn supplemental heat | Outcome-based; deep bedding + draft-free | NFACC 2023 Dairy Code (see Regulation: NFACC 2023 Dairy Code — calf welfare and propane-relevant requirements) |
| Teat-prep hot water | 38–45°C at the wash bucket / udder spray | Continuous lower-grade draw |
| Office, shop, milkhouse space heat | 18–21°C | Often the largest single annual draw in shoulder seasons |
CIP wash quote (OMAFRA, Mike Foran): "hot wash — chlorinated alkali wash cycle (temperature at the start (74°C (165°F) or higher) and end (49°C (120°F) or higher)." Verified.
Estimated annual consumption and tank sizing
| Operation | Annual propane (L) | Tank sizing typical |
|---|---|---|
| 50–80 cow tie-stall, modest calf heat | 3,000–6,000 | 500–1,000 USWG |
| 100-cow parallel parlour, standard calf barn | 5,000–10,000 | 1,000 USWG (3,028 L) |
| 200-cow parlour, heated calf barn | 10,000–20,000 | 1,000–2,000 USWG, often two tanks |
| 300+ cow rotary or twin-robot + heated calf barn | 15,000–30,000+ | 2,000–4,000 USWG manifolded |
Confidence: Estimated. Operations with substantial separate calf housing (NFACC 2023 air-space minimums: 6 m³ per calf to 6 weeks, 10 m³ per calf to 12 weeks) commonly consume 50–100% more than parlour-only.
Run-out consequences specific to dairy
- Parlour cannot wash → milk pickup at risk → DFO Grade A raw-milk standard infraction. The Ontario Milk Act, R.S.O. 1990, c. M.12, and the Milk Industry — Plants Regulation, R.R.O. 1990, Reg. 761, require defined sanitary standards; pickup is refused if CIP cleaning has not occurred to spec. Detail in Regulation: Ontario Milk Act — propane run-out as regulatory exposure on dairy. Verified.
- Bulk-tank temperature control compromised → SCC/IBC penalties. OMAFRA confirms milk must reach 1–4°C within two hours of first milking.
- Calf-barn cold stress → mortality, scours, slow growth → visible 60 days later in heifer weights.
The economic asymmetry: a single missed milk pickup costs many times the price of an emergency tank fill. Keep-full + telemetry is not a luxury at this size — see Concept: Telemetry and keep-full — livestock-specific operational considerations.
Sources
OMAFRA Raw Milk Specialist Mike Foran (Ontario Goat Goat Gazette, June 2016); NFACC 2023 Dairy Code; Ontario Milk Act, R.S.O. 1990, c. M.12; R.R.O. 1990, Reg. 761; OMAFRA bulk-tank cooling guidance.
On the Boucher & Jones site: Agriculture