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Food & Beverage

Pasteurizing with hot water: integrating process and facility energy from the start.

At Ocean Spray’s Lehigh Valley bottling facility, WEI redesigned the plant’s utility concept around high-efficiency hot water, process heat recovery, ductless positive-pressure HVAC and integrated controls.

Key Results

Key results

>$1M/yr
Guaranteed utility savings
First in U.S.
Juice plant to pasteurize with hot water
0 purchased heat
Winter building heat from recovered energy
1 The Challenge

Design a new beverage plant around total energy performance

When Ocean Spray developed its new Lehigh Valley juice bottling facility, the goal was not simply efficient equipment but integrating process heating, cooling, HVAC and utility systems.

The conventional design relied on steam. WEI instead mapped the full thermal path through the juice process and facility — where energy could be delivered at lower temperatures, where heat was rejected, and where it could be reused.

2 WEI’s Approach

Replace steam with a closed-loop hot-water platform

WEI built an integrated energy model during construction and redesigned the utilities around a 230°F hot-water platform, cutting the penalty of generating and distributing steam while improving control, reliability and maintainability.

WEI supplied major energy equipment, developed sequences of operation, programmed controls and supported Check/Test/Start, commissioning, training and performance verification.

Core Solution

Hot water + heat recovery + positive-pressure HVAC

Rather than treating process and building loads separately, WEI linked the plant’s hot-water, cooling and HVAC systems so rejected process heat becomes a useful energy source elsewhere.

3 Recover the Heat

Use process rejection energy twice

The juice process heats product for pasteurization, then cools it before filling. WEI found that much of the energy normally rejected during cooling could be recovered instead.

Moderate-temperature recovered heat preheats juice, while lower-temperature tower-water heat feeds HVAC heating coils in season — heating the building with recovered rejection energy rather than purchased energy in winter.

Process Heat Recovery

Captured, then reused

Heat rejected during bottle cooling is captured and reused to reduce the energy required for juice preheating.

Ductless Positive Pressure

Less air-moving energy

WEI’s HVAC strategy uses building pressurization and low-temperature recovered heat to condition the manufacturing space with less air-moving energy.

4 Controls & Verification

Keep the systems integrated after startup

WEI built the controls architecture and energy dashboard to integrate facility and process systems, compare actual performance with targets, and feed ongoing Monitoring & Verification.

Long-term performance is built into the model: engineer, commission, train operators, monitor, and use real data to find the next optimization.

5 Results

A first-of-its-kind hot-water beverage plant

Ocean Spray’s Lehigh Valley facility became the first U.S. juice plant to pasteurize with hot water instead of steam. Recovered rejection energy lets it use zero purchased energy for building heat in winter.

>$1M
Guaranteed annual utility savings
Juice + HVAC
On hot water instead of steam
Winter
Building heat from recovered energy

It shows how food and beverage plants can cut purchased energy by designing process, utility plant, HVAC and controls as one connected thermal system.

6 Continuing the Work

From one facility to portfolio-wide energy strategy

WEI’s work with Ocean Spray continued beyond Lehigh Valley — ongoing monitoring and optimization, further heat-recovery evaluations at the plant, and a corporate emissions-reduction assessment across multiple facilities.

The same principle drives the work: understand where energy enters the process, where it is rejected, and how much can be recovered before buying more.

7 WEI Services

Integrated process and facility energy engineering

Energy Modeling & Feasibility Analysis
Process / Facility Thermal Integration
Hot-Water Utility System Design
Waste-Heat Recovery
Ductless Positive-Pressure HVAC
Controls & Energy Dashboard
Equipment Procurement & Integration
Check / Test / Start (CTS)
Commissioning & Training
Monitoring & Verification

ENGINEERED. INSTALLED. VERIFIED.

In food and beverage, rejected process heat is an energy resource.

WEI connects process, utility and HVAC systems so facilities can recover more energy, purchase less and verify performance over time.

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