Pioneering Safety & Efficiency in Ammonia Refrigeration

In ammonia refrigeration, safety and efficiency are critical. Transpek Industry Limited partnered with Alfa Laval to replace its legacy evaporator with the first U-turn semi-welded Plate Heat Exchanger in a 135 TR brine plant. This innovation reduced ammonia charge by 650 kg, improved thermal performance, and cut energy consumption - delivering a smarter, safer, and more sustainable solution for industrial cooling.

DATE 2025-12-17

Why U-turn Semi-Welded PHE?

Plug & Play Module: Easy installation, minimal site work
Compact Design: Smaller footprint, maximum efficiency
Natural Refrigerant: Uses ammonia, eliminating GWP emissions
Energy & Resource Savings: Lower power needs and reduced ammonia volume

Customer Challenge

Transpek faced growing concerns over safety and efficiency in its ammonia refrigeration system - high refrigerant volume, rising energy costs, and limited thermal performance demanded an urgent upgrade.

Managing ammonia-based refrigeration systems comes with two major challenges:

Reducing ammonia hold-up volume to minimize safety risks
Lowering energy consumption to cut operational costs

The existing shell-and-tube flooded evaporator was falling short, leading to:

High ammonia volume and safety concerns
Suboptimal energy performance due to poor heat transfer

The Alfa Laval Solution

Alfa Laval introduced its Next Generation Semi-Welded TK20BW PHE with patented U-turn separator design, replacing the legacy evaporator with a compact, energy-efficient, and reliable system.

Key Features

CurveFlow technology for superior thermal efficiency
700-mesh inline filter for particulate protection
Auto-cleaning back-flush mechanism for reduced manual maintenance
Seamless integration with an evaporative condenser for optimal synergy

Impact

Ammonia charge reduced by 650 kg
Lower compressor discharge pressure
Improved suction pressure and approach temperature
Significant reduction in specific power consumption

The Future of Refrigeration Starts Here

Alfa Laval’s U-turn semi-welded Plate Heat Exchanger is more than an upgrade - it is a commitment to safety, efficiency, and sustainability. By reducing ammonia charge, cutting energy consumption, and delivering superior thermal performance, this innovation sets a new benchmark for industrial refrigeration. For businesses striving to minimize risk, optimize operations, and align with global sustainability goals, the time to act is now.

Partner with Alfa Laval and transform your refrigeration system into a smarter, safer, and future-ready solution.

Alfa Laval’s U-turn PHE helped us bring down ammonia charge by 650 kg, substantially enhancing safety. With better approach temperature and lower discharge pressure, we’ve achieved meaningful energy savings.
- Vipul Parikh, Plant Manager, Transpek Industry Ltd.