Cooling Suit for First Responders

描述(由申请人提供)：在应对化学品泄漏或其他危险清理工作时，第一反应人员必须经常穿着A级危险材料套装。这些工作服通过将穿戴者完全密封，使其免受外部蒸汽和液体的伤害，从而保护急救员免受化学物质的伤害。因为西服是密封的，所以需要一个通常由自给式呼吸器(SCBA)提供的新鲜空气供应。总而言之，SCBA/防渗服提供了无污染物的空气和化学危险的屏障。不幸的是，由于西装是密封的，它们很快就会变得非常炎热和潮湿。考虑到急救员可以在30-60分钟内穿西装，过热不仅是不适的来源，而且对急救员的健康构成真正的危害。此外，汗水会凝结在面板的内侧，遮挡视线，西装中的热量/湿度积聚严重限制了穿着西装的时间，而不会有中暑的风险。 TDA研究公司(TDA)建议开发一种轻便、便携的系统，该系统将对通过防护服流通的空气进行冷却和除湿。TDA将使用热交换器将热量从西装内部转移到肮脏的环境中，但将清洁和受污染的气流分开。干燥的(约15%相对湿度)清洁空气被冷却到约770F，并返回到第一个响应器。在个人防护装备(PPE)中，凉爽、干燥的空气通过轻质织物和内部管道系统分配到手、头和脚。在第一阶段项目中，我们将设计和建造一个测试换热器来展示我们的概念。此外，我们还将使用2D软件和有限元分析进行系统分析。设计分析将成为二期工程样机制造的基础。

DESCRIPTION (provided by applicant): When responding to a chemical spill or other hazardous cleanup operation, first responders must frequently wear a level A hazardous materials suit. These suits protect the first responder from chemical exposure by completely sealing the wearer against external vapors and liquids. Because the suits are sealed, a fresh air supply is required which is typically provided by a self-contained breathing apparatus (SCBA). In total, the SCBA/impermeable suit provides contaminant free air and a barrier to the chemical hazard. Unfortunately, because the suits are sealed, they quickly get very hot and humid. Given the fact that a first responder can be in the suit from 30-60 min, overheating is not just a source of discomfort, but is a real hazard to the health of the first responder. In addition, perspiration condenses on the inside of the faceplate obscuring vision, and the heat/humidity buildup in the suit severely limits the time that can be spent in the suit without risking heat exhaustion. TDA Research, Inc. (TDA) proposes to develop a lightweight, portable system that will both cool and dehumidify the air circulated through a hazmat suit. TDA will use a heat exchanger to transfer heat from the inside of the suit to the dirty environment, but keeps the clean and contaminated air streams separate. The dry (about 15% RH) clean air is cooled to about 770F and returned to the first responder. The cool, dry air is distributed to the hands, head, and feet within the Personal Protective Equipment (PPE) with a lightweight fabric, internal duct system. In the Phase I project, we will design and build a test heat exchanger to demonstrate our concept. In addition, we will perform a system analysis using a 2D software and a finite element analysis. The design analysis will form the basis of the prototype fabrication in the Phase II project.