Cold chain answers

The usual failure is sizing a building first and discovering the refrigeration load afterwards. Volume is driven by tonnes per day multiplied by dwell days divided by realistic net product density, then divided again by a utilisation factor that covers aisles, evaporator clearance and picking faces.

Refrigeration load is a separate calculation: transmission through the envelope, product pull-down, infiltration through doors, people, lighting, fork trucks, fans and defrost, plus a safety margin. Load per cubic metre varies by more than a factor of five between a low-turnover chilled store and a blast tunnel, so a single rule of thumb across a mixed facility will be wrong somewhere.

Utilities decide feasibility as often as budget does: available electrical capacity, supply reliability, water for condensers, and whether the site can host the plant room and safety distances the refrigerant choice requires.

A quotation is only comparable when every bidder prices the same duty at the same design conditions. Publish the ambient design temperature you want the plant rated at, not just 'summer', and state whether the price must include installation, electrical work, commissioning and training.

State exclusions explicitly. Civil works, drainage, standby generation, floor heating under freezers and the incoming electrical supply are the items most often silently omitted from the cheapest quotation.

Size the standby supply for the duty you must keep running, not the full connected load: plant, condenser fans, controls, monitoring and dock lighting usually suffice, while battery chargers and office loads can be shed.

On weak or unstable grids the generator stops being a backup and becomes part of the base design, which changes fuel budgeting, maintenance and the case for solar-hybrid operation. State grid reliability in the RFQ so bidders price the same assumption.

Capacity and throughput are not the same variable. A store holding 5,000 pallets that receives 40 pallets a day and one that receives 400 pallets a day need different refrigeration capacity, different door and dock design and different defrost strategies, even at identical volume.

Ambient climate changes condensing conditions and therefore capacity, energy demand and equipment selection. A plant rated at a 32 °C design ambient behaves differently on a 45 °C site.

Room configuration matters too: one large freezer, three mixed-temperature rooms, or a chilled store plus a blast tunnel are three different projects even at the same total volume.

Typical sequence: size the room with the cold room size calculator, estimate the duty with the refrigeration load calculator, check running cost with the electricity cost calculator and refrigeration TCO calculator, test backup or solar scenarios where power reliability is a concern, then score readiness with the RFQ readiness score calculator before issuing the RFQ.

Inputs are the same project variables suppliers will ask for: product, temperature, volume or pallet count, throughput, ambient conditions, operating hours and power availability. Outputs are indicative planning ranges intended to open a tender, not to replace design.

Every tool links onward to the RFQ builder so the numbers reach suppliers in a structured brief instead of being retyped.

Key inputs: internal dimensions and clear height, insulation type and thickness, site ambient design temperature and humidity, target room temperature, daily product intake in tonnes, product entering temperature, required pull-down time, number and type of door openings per day, and hours of operation.

Why they matter: two rooms of identical volume can differ by a factor of several in duty if one receives warm product daily and opens its doors hundreds of times, while the other holds frozen stock with low turnover. Blast freezing and pre-cooling are peak-driven and should be calculated separately from holding rooms.

What ColdMatch helps with: turning these inputs into an indicative planning figure and carrying them into a structured RFQ so every manufacturer quotes against the same assumptions. Limitation: the platform's load figure is a preliminary planning estimate, not an engineering calculation — the selected qualified provider performs the final load calculation and design.

Write the temperature requirement as three values: set point, permitted operating band, and the recovery expectation after a door cycle or a defrost. Many disputes after commissioning come from a room that holds the set point on average but drifts outside the band during loading.

Mixed-product facilities are usually cheaper and safer as separate zones than as one compromise room, because the coldest, most humidity-sensitive product otherwise sets the duty for the whole envelope.

Freezing (pull-down) and holding are different duties. A holding freezer sized for storage will not freeze incoming warm product to core temperature within a shift; that requires a blast freezer or freezing tunnel priced separately.

Running hours matter as much as the load itself: the same daily heat load spread over 16 hours needs materially less installed capacity than the same load over 12 hours, but a shorter run window buys defrost and recovery headroom.

A planning estimate is enough to open a tender and compare bidders at the same duty. The selected engineering provider produces the certified design, refrigerant charge, pipe sizing and equipment selection.

If pull-down is a core requirement, consider whether a separate pre-cooling or blast stage is more efficient than oversizing the holding room, which then runs at poor part-load for most of the year.

Throughput also drives door traffic, dock design, aisle layout and forklift heat — all of which feed back into the load calculation.

Inputs needed: external envelope area by surface, insulation type and thickness, ambient design temperature for each boundary (a wall facing an unconditioned dock is not the same as one facing outdoor sun), room set point, and whether the floor is heated or sits over ground.

Why it matters commercially: increasing panel thickness raises capital cost once, while under-insulating raises running cost every hour of the store's life. Envelope decisions therefore belong to the planning stage, before the RFQ, because they change the duty every bidder quotes.

Limitation: a planning estimate uses simplified U-values and a single design ambient. The selected engineering provider performs the surface-by-surface calculation, including thermal bridging and solar gain.

Also state: any power-quality or harmonic requirements, standby generator presence and rating, UPS needs for controls and monitoring, and site restrictions on cable routing or plant-room location.

Comparison consequence: one bidder may include transformers, switchgear, cabling and earthing while another quotes 'terminals of the plant only'. Normalise the electrical scope line by line before comparing totals.

Limitation: ColdMatch does not perform electrical design or verify site supply capacity; that is the responsibility of the buyer's electrical engineer and the selected provider.

Inputs: peak stock in pallets or tonnes, pallet dimensions and stack height, product density, racking type and levels, aisle width for the handling equipment used, inbound/outbound staging area, door and dock positions, and any future expansion allowance.

Common planning mistake: sizing for average stock rather than seasonal peak, and forgetting staging space for goods waiting to be received or dispatched. Both force costly extensions or external storage later.

Limitation: a size estimate is a planning figure. Final layout depends on racking design, fire and access rules, floor loading and local building requirements, which the buyer's design team and the selected provider confirm.

Inputs: number of people and hours worked inside the room, lighting installed power and hours, handling equipment type and duty cycle, evaporator fan power and run hours, defrost energy and frequency, and any in-room process equipment.

Design consequence: fan power and defrost are recursive — larger coils and longer defrost add load, which adds capacity. This is one reason a planning estimate should be treated as indicative and confirmed by the engineering provider.

Practical lever: efficient lighting with occupancy control, fan speed control and reduced door-open time lower both the load and the running cost, without changing the stored product.

State in the RFQ: expected growth over the planning horizon, whether phase two is committed or optional, and which provisions must be included now (plant-room footprint, header and pipework sizing, electrical spare capacity, structural allowance, condenser space).

Comparison consequence: a bidder that ignores expansion looks cheaper than one that includes provisions. Ask every bidder to price the provisions as a separate, clearly identified line so the comparison stays fair.

Why the order matters: each item constrains the next. Product sets temperature; temperature and throughput set duty; duty and site conditions set equipment; equipment and redundancy set electrical supply and plant-room space. Working backwards from an equipment preference usually produces a specification that does not match the operation.

What ColdMatch helps with: capturing these inputs once, producing indicative planning figures with the calculators, building a structured RFQ, researching manufacturers suited to that requirement, and organising returned proposals side by side with human support throughout.

Limitation: ColdMatch is not a manufacturer, installer or certified engineering firm. Final design, performance and compliance responsibility sits with the selected provider and the buyer's own engineers.

The operational difference shows in infiltration. A warehouse with frequent door openings and a dock needs door protection, air curtains or an air-locked dock, and its infiltration load can exceed transmission through the walls.

Redundancy expectations also differ. A single cold room usually accepts a single plant with spare parts on site; a warehouse holding weeks of stock is normally specified N+1 so one compressor can fail without losing the load.

IQF equipment is priced per tonne of hourly capacity and is sensitive to product piece size and moisture; a line specified for one product rarely runs another at the same rate without changed belt speed and airflow.

Both technologies carry far higher specific loads than storage. Sizing the freezing plant from a storage rule of thumb is a common and expensive error.

In the EU, refrigerant choice is constrained by the F-gas Regulation; in the United States, EPA SNAP lists acceptable substitutes by end use; many other countries follow the Kigali Amendment phase-down schedule. Check the rule that binds your site before comparing efficiencies.

Ammonia installations are governed by safety standards — IIAR practice in North America, EN 378 in Europe — that dictate machinery-room design, detection, ventilation and charge limits. These are project cost items, not paperwork.

Service availability is decisive in markets with few trained technicians: the most efficient plant is the wrong plant if nobody within a day's travel can maintain it.

Air temperature and product temperature are not the same thing. A store running −20 °C air can still hold product warmer than −18 °C at the pallet centre after a warm intake, which is why pull-down capacity and intake temperature belong in the RFQ alongside the storage set point.

Colder set points cost energy roughly in proportion to the lift the plant must produce, so a blanket −25 °C across a mixed facility is an avoidable operating cost when only one zone needs it. Zone the building instead.

Compare panel offers on core material, declared thermal conductivity, joint and sealing detail, vapour-tightness and fire classification — not on millimetres alone. Two panels of the same thickness can have materially different heat gain and very different fire behaviour.

Freezer rooms also need a floor strategy: under-floor heating or a ventilated slab prevents frost heave. This item is frequently excluded from the cheapest quotation and should be an explicit RFQ line.

Thermal bridging at junctions, doors and penetrations can dominate real-world transmission losses even when the panel specification is correct.

Mitigations commonly specified include high-speed doors, air curtains, strip curtains, dock seals and shelters, vestibules or airlocks between temperature zones, and layout changes that reduce cross-zone traffic.

State door size, type and expected openings per hour in the RFQ. Without it, bidders assume very different traffic and their capacity, defrost strategy and energy figures stop being comparable.

Quantify the exposure first: product value at risk per hour of downtime, how long the room holds temperature unaided, lead time for the critical component, and local service response time. Those four numbers make the redundancy discussion commercial rather than theoretical.

Redundancy must be stated in the RFQ, because it changes the plant architecture and price. A single-compressor package and an N+1 rack are not comparable offers.

Specify monitoring in the RFQ, not after handover: number and position of sensors, calibration and traceability, logging interval, data retention, alarm thresholds, escalation path, and whether the system must operate through a power failure.

Where a system is used for regulated storage, the buyer or their quality function owns the compliance decision. ColdMatch does not certify systems or issue compliance approval.

Inputs to state in the RFQ: product and packaging, required relative humidity band if any, tolerance, and whether the band must be recorded. If no band is stated, bidders will assume the value that suits their standard coil selection, and the offers stop being comparable.

Where active control is required, options include coil selection at a reduced temperature difference, dehumidification, air-curtain or vestibule control of infiltration, and adjusted defrost frequency. Each has a capital and energy consequence.

Limitation: relative humidity in an operating room varies with load, door usage and defrost. Treat any single figure as a design target, not a guarantee.

Inputs: peak duty in kW at stated conditions, evaporating temperature, design condensing temperature, refrigerant, expected load profile across the year, available electrical supply and starting constraints, noise limits, and service access.

Comparison consequence: two proposals quoting the same nominal kW can differ substantially once the conditions are equalised, because capacity is only meaningful at stated evaporating and condensing temperatures. Always require bidders to state both.

Limitation: ColdMatch does not select equipment or issue engineering designs; the qualified provider is responsible for selection, sizing and performance.

Inputs: site design dry-bulb (and wet-bulb where evaporative rejection is proposed), heat-rejection method — air-cooled, evaporative or adiabatic — available water, altitude, and any noise or space limits on the condenser location.

Comparison rule: require every bidder to state evaporating temperature, condensing temperature and the ambient design condition used. Normalising to one common set of conditions is the first step of proposal comparison; price comparison before that step is unreliable.

Limitation: design ambient conditions should come from recognised local climate data for the site, not from a generic regional figure.

Inputs: room temperature and humidity target, room geometry and rack layout, product sensitivity to air movement, door positions, and expected moisture ingress from traffic.

In the RFQ, ask for coil temperature difference, number and position of units, air throw, defrost method and frequency, drain and trap heating, and whether fan speed control is included. These items materially affect both energy use and product quality.

Limitation: airflow and uniformity depend on the final layout and stacking practice; no single specification guarantees uniform temperature in an operating room.

Frozen space costs more than chilled space for the same volume: thicker insulation, floor heating, lower evaporating temperature and larger plant. Blast and IQF capacity costs several times more per cubic metre than storage.

Landed cost dominates in inland and small-port markets. Ocean freight, duty, clearance and inland haulage can be a fifth of the installed cost before a bolt is turned.

Demand charges matter as much as energy in many industrial tariffs: peak kW can be a fifth of the annual electricity cost, and load-shifting or thermal storage can cut it without touching consumption.

Cooling demand is rising fast worldwide, which is why efficiency measures increasingly pay back on energy price alone rather than on carbon accounting.

The useful question is not 'can solar run it' but 'what share of annual kWh can solar displace at what payback'. Facilities with daytime-heavy loads — packhouses, pre-cooling, daytime picking operations — displace far more than a static frozen store that draws a flat load around the clock.

Thermal storage is often cheaper than batteries for refrigeration: over-cool the store or an ice/glycol bank while the sun is up and coast through the evening peak. That only works where the product and the plant tolerate the temperature swing.

Ask every bidder to state the assumptions behind their energy figure: ambient design condition, running hours, load profile, defrost strategy, part-load behaviour and control strategy. Numbers stated without assumptions are not comparable and are not a guarantee.

Refrigerant choice affects lifecycle cost through efficiency, regulation, availability, service skills and leak-management obligations, not only through the purchase price of the plant.

Ask each bidder to price the same three things separately: equipment supply, installation and commissioning, and the first two years of service and spares. Bundled lump sums hide where the money and the risk sit.

Set the acceptance criteria before award. A pull-down test at stated ambient with a stated product load is the clause that turns a performance promise into something enforceable.

Reference checks are worth more than certificates. Ask for a site at a similar duty, in a similar climate, commissioned at least two years ago, and call the operator.

Confirm what happens to the warranty if a local subcontractor installs equipment supplied by an international manufacturer — a split scope with no single responsible party is where cold-chain disputes start.

Procurement time is the part a buyer controls. Projects that stall almost always stall before the RFQ, because the temperature, throughput and site data were never fixed, so each bidder quotes a different scope and the comparison has to start again.

Delivery time is quoted by the selected supplier and depends on manufacturing slots, shipping, site readiness and the local approvals chain. ColdMatch does not deliver, install or commission, and does not guarantee a supplier's programme.

Matching is duty-driven. An ammonia plant for a 20,000-pallet warehouse and a packaged CO₂ system for a packhouse are different supplier populations, so a shortlist is built from the technical brief rather than from a single fixed vendor list.

Screening has limits and they are stated openly: it does not audit a factory, verify every certificate, or replace the buyer's own due diligence and contract terms with the selected provider.

What screening does catch: obvious scope mismatch, absent references at the required temperature class, missing declared certification, and no service presence in the destination market.

What it cannot catch: current factory conditions, live production quality, and financial stability at the moment of contracting. Buyers should request recent references, and commission independent inspection or third-party audit where project value justifies it.

The most common distortions are scope exclusions: civil works, incoming electrical supply, standby generation, floor heating under freezers, drainage, insulated doors, controls integration and commissioning. The cheapest bid is often the one that excluded most.

Ask each bidder to price equipment supply, installation and commissioning, and the first years of service and spares separately. Bundled lump sums hide where cost and risk sit.

ColdMatch helps organise proposals against the same defined project inputs so differences are visible. It does not fully normalise proposals into a single score, does not audit supplier claims and does not guarantee performance.

Practical considerations: state clearly whether the scope is equipment supply only, supply and installation, or turnkey including civil and panel works; and say which drawings, site photos or existing plant details are available. Ask every manufacturer to return the proposal in the same structure so line items line up.

What ColdMatch helps with: collecting these inputs once, producing a structured RFQ, and organising returned proposals side by side. Limitation: ColdMatch does not manufacture, design, install or certify equipment, and does not verify manufacturer performance claims.

Next step: prepare the brief in the RFQ builder rather than sending free-text emails.

Items most often missing from the cheapest offer: electrical works to the plant, standby power, freezer floor heating, drainage, civil works, controls integration, monitoring, commissioning, training, documentation and spare parts.

Restate each bid on one sheet: design conditions, duty at those conditions, architecture, main components, refrigerant, insulation, doors, controls, monitoring, redundancy, installation, commissioning, warranty, spares, service response, and stated energy assumptions. Differences that survive that exercise are real.

Define acceptance explicitly: which conditions the plant must demonstrate, over what duration, with which instrumentation, and who witnesses it. Vague acceptance wording creates disputes at the end of the project, when leverage is lowest.

Warranty comparison should cover duration, what it covers, exclusions, response time, spare-parts availability, and whether labour and travel are included — not only the number of months.

Limitation: ColdMatch does not install, commission, certify or warrant equipment. Those obligations sit in the contract between the buyer and the independent provider.

The engineering consequence is redundancy: N+1 plant, an alarmed monitoring system independent of the control system, and a documented excursion procedure.

Specify who produces the validation documentation in the RFQ. Retrofitting a qualification package after commissioning is far more expensive than buying it with the plant.

Post-harvest loss is concentrated in the first hours after harvest, which is why FAO's loss work consistently points at the cooling gap rather than at warehouse capacity.

Sizing follows the crop: leafy vegetables suit vacuum cooling, stone fruit and grapes forced air, some root crops hydro cooling. Mixing crops in one pre-cooler always compromises one of them.

Practical consequences for the RFQ: pharma bidders must price qualification documentation and mapping support, redundancy that keeps the band during a fault, and controlled change procedures. Food bidders are more often compared on duty, hygiene detail, throughput and energy.

Both cases share the same starting point: product, temperature band, throughput, ambient design conditions and site utilities. The difference appears in evidence and assurance requirements, not in the load calculation.

Project consequences: a frozen store commonly needs under-floor heating, heated door frames and drains, hot-gas or electric defrost, and vestibules or high-speed doors. A chilled packhouse more often needs pre-cooling capacity, humidity management and rapid product turnover.

Exact temperature bands depend on the product, the buyer's own quality standard and the applicable local rules. State the required band and tolerance in the RFQ rather than relying on a generic 'chilled' or 'frozen' label.

Limitation: ColdMatch does not set food-safety temperature requirements or certify compliance; those follow the applicable regulations and the buyer's quality function.

What ColdMatch does: structures the technical brief, prepares a comparable RFQ, circulates it to relevant independent suppliers, and helps the buyer compare the responses on the same basis.

What stays with the provider: final engineering, compliance with local regulation, pricing, delivery, installation, commissioning, warranty and performance. Where financing is discussed, introductions are to independent third parties who decide eligibility and terms themselves.

A well-prepared file is what makes a cold-chain project reviewable at all: lenders decline far more projects for missing documentation and unclear scope than for weak economics.

Keep any indicative payback, NPV or debt-service figure clearly labelled as the buyer's own planning estimate, to be confirmed with an accountant and the financing institution.

For a breakdown, call a local refrigeration service company — a sourcing process takes days, and a failed plant does not have days.

For a small, well-defined replacement where you already know the make and model, buying direct from a manufacturer or their local dealer is usually faster and cheaper.

Practical consequence: performance guarantees (pull-down time, temperature stability, energy consumption, uptime) must be written into the supply or EPC contract itself, with test conditions, measurement method and remedies. A comparison sheet cannot substitute for contractual language.

Split-scope projects (panels, refrigeration plant, racking, controls, civils) need a single named party responsible for interfaces and overall temperature performance, otherwise responsibility gaps appear at commissioning.

Who uses it: cold-storage buyers, industrial project developers, refrigeration consultants and procurement teams working on commercial and industrial projects.

The working sequence is: define product and temperature, define capacity and throughput, define rooms and supporting infrastructure, calculate, structure the project, issue an RFQ, research manufacturers, collect proposals, compare them on the same basis, and take the decision with human support available at each step.

Supplier-neutral means ColdMatch is not tied to one manufacturer or technology. The buyer chooses; the selected independent provider contracts, designs, delivers and warrants the scope.

Practical consequence: contacting ten suppliers with an undefined brief produces ten different scopes at ten different assumptions. Contacting five suppliers with a defined duty, ambient design condition, scope split and required proposal format produces comparable numbers.

ColdMatch is supplier-neutral. It does not sell equipment, does not favour one refrigerant or manufacturer, and does not earn a margin on the equipment the buyer selects.

A directory is useful once the project is defined. That is the order ColdMatch works in: project first, suppliers second.

Typical use: a consultant defines the brief with the client, uses the platform to produce a structured RFQ and a documented set of project inputs, then reviews the returned proposals with the client against those inputs.

ColdMatch does not contact the consultant's client behind them, does not issue engineering approvals and makes no contractual guarantee about supplier outcomes.

The platform's role stops at project structuring and proposal organisation. The selected independent provider contracts with the buyer, performs the design and the works, and carries performance and warranty responsibility.

Financing introductions, where offered, are to independent partners who decide eligibility and terms; no financing outcome is guaranteed.