- How much electricity does pharmaceutical cold storage use?
- Electrical input is the refrigeration duty divided by the system COP, multiplied by running hours and load factor. A 60 kW +2/+8 °C duty at COP 2.8, running 8,000 hours at 70% load, draws roughly 120,000 kWh a year. The same duty at −80 °C, where COP is closer to 0.8, would draw over 400,000 kWh — which is why band, not area, is the first input.
- What COP should I assume for a pharmaceutical cold store?
- As a planning range: roughly 2.1–3.4 for +2/+8 °C, 1.3–2.1 for −20 °C and 0.55–1.0 for −70/−80 °C, depending on refrigerant, condensing strategy, part-load control and ambient. Never use a single figure in a budget — run the optimistic, base and pessimistic scenarios and present the band.
- What affects pharmaceutical cold storage energy consumption most?
- Temperature band first, then condensing conditions and control quality, then door and infiltration discipline, then the redundancy configuration (standby plant that idles still consumes), then defrost strategy. Insulation matters but is usually a smaller lever than the others once the envelope meets a reasonable standard.
- Does redundancy increase running cost?
- It can. N+1 plant that rotates duty across more compressors often runs each at better part-load efficiency and can lower consumption; plant that keeps standby equipment energised without load can raise it. Ask bidders how the standby machine is controlled and what it consumes when not on duty.
- How should this be used in a supplier comparison?
- Fix the duty, running hours, load factor and tariff, then require every bidder to state COP or absorbed power at the same design point. Feed those numbers here to convert quoted efficiency into an annual cost, and carry it into the total cost of ownership comparison before deciding.
