Objective:

This project explored commercially available and high TRL developmental body cooling technologies. Selected various options based on differing cooling technologies and methods: evaporative cooling, convective cooling, conductive cooling, phase change materials (PCMs), microencapsulated PCM fabrics, refrigerant tube cooling, wicking fabrics, etc. Pilot tested several options and assessed key parameters for heat relief, comfort, ergonomics, and health safety. Reported on each parameter and overall effectiveness. Documented pricing and accessibility. Drafted potential implementation plans and costs. Assessed financial feasibility to make body cooling widely available to shipbuilders. Estimated risk reduction.

Summary:

Shipyard workers who perform labor in hot, sunny, and/or high humidity environments are subject to fatigue and heat stress, which decreases worker performance and poses health risks. Studies show that heat exhaustion can cost $6-10k or more per incident for emergency room visits and hospital stays. One 5-day heat wave with heat index 100F-120F led to hundreds of deaths with body core temps of 105F. Legacy safety precautions of drinking more water and taking breaks do not take advantage of recent technology developments. Studies show use of cooling garments can limit the increase in body and skin temperature and limit the increase of heart rate during exercise in hot environments. Although some body cooling garments are commercially available, they are not widely tested, accepted, or implemented throughout U.S. shipyards. A trade study can provide a consumer-report type comparison on what types of technologies are available, at a range of prices, and which are more effective in specific environmental conditions. This will also help shipyards be prepared for potential OSHA regulation updates.

Key Deliverables / Benefits:

  • Stakeholder Analysis
  • Identification of Body Cooling Technologies for Testing
  • Develop Test Plan, Conduct Testing, and Gather Data
  • Analyze Data and Prepare Implementation Plan
  • Final Report

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Overview

Sustainment

Project Team: 

  • Ingalls Shipbuilding, Newport News Shipbuilding (NNS), General Dynamics Bath Iron Works (BIW), Pearl Harbor Naval Shipyard (PHNSY), TDA Research

February 2024 – March 2025

NSRP ASE Investment:  $150K

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