Purchase Order NNL14AA83P

STATEMENT OF WORK MEZZO TECHNOLOGIES WATER PCM HX DEVELOPMENT PURPOSE, OBJECTIVE, AND BACKGROUND OF WORK TO BE PERFORMED: THE OBJECTIVE OF THE PHASE CHANGE MATERIAL HEAT EXCHANGER DEVELOPMENT PROJECT IS TO CREATE VIABLE SOLUTIONS FOR FUTURE EXPLORATION VEHICLES IN THE AREA OF LONG TERM SUPPLEMENTAL HEAT REJECTION. PHASE CHANGE MATERIAL HEAT EXCHANGERS (PCM HX) CAN BE USED AS A LONG DURATION SOURCE OF SUPPLEMENTAL HEAT REJECTION WHEN SUCH A SOURCE IS NEEDED. A TYPICAL PCM HX IS USED TO STORE THE EXCESS THERMAL ENERGY DURING PERIODS OF HIGH HEAT LOADS (OR HOT THERMAL ENVIRONMENTS) BY MELTING A PHASE-CHANGE MATERIAL AND REJECTING THE STORED ENERGY AT A LATER TIME. DURING THE REJECTION PERIOD, THE MATERIAL IS FROZEN AGAIN PREPARING IT FOR THE NEXT HEAT LOAD (MELTING) PERIOD. AN EXAMPLE OF THIS IS THE LOW LUNAR ORBIT THERMAL ENVIRONMENT. THIS ENVIRONMENT IS QUITE UNIQUE DUE THE MOON S HIGH IR BACKLOAD FROM ITS SURFACE. THIS RESULTS IN A HIGH ENVIRONMENTAL SINK TEMPERATURE FOR ORBITING VEHICLES. CURRENTLY, ORION HAS BASELINED A PCM HX FOR ITS EXPLORATION MISSION 2 (EM-2) DUE TO THE PLANNED LUNAR ORBIT MISSION PROFILE. THE VEHICLE IS EXPECTED TO REQUIRE MORE THAN 6000 KJ OF ENERGY STORAGE FOR THIS MISSION. THE PROJECT HAS IDENTIFIED A VIABLE DESIGN CONCEPT FOR THE NEXT GENERATION PCM HX. THIS HEAT EXCHANGER UTILIZES WATER AS A PHASE CHANGE MATERIAL (INSTEAD OF TRADITIONAL WAX), AND THE TECHNOLOGY IS AT A TRL OF 4. WATER-BASED PCM HX S OFFER A SIGNIFICANT MASS AND VOLUME SAVINGS OVER WAX-BASED PCM HX DUE TO THE INCREASED HEAT OF FUSION OF WATER OVER WAX. THE PROJECT WILL LEVERAGE AN SBIR PHASE III IN PARTNERSHIP WITH MEZZO TECHNOLOGIES TO EVALUATE MULTIPLE WATER-BASED PCM HX CONCEPTS. THE INITIAL PHASE OF DEVELOPMENT WILL CULMINATE TO A KEY DECISION POINT ON WHETHER OR NOT A WATER PCM HX IS A VIABLE OPTION AND HAS REACHED A TRL OF 5. IF SO, THE PROJECT WILL DESIGN AND FABRICATE A FLIGHT-LIKE WATER PCM HX FOR DEMONSTRATION ON THE ISS. DESCRIPTION OF THE WORK TO BE PERFORMED: MEZZO TECHNOLOGIES PCM HX DESIGN OPTION 1 THE PCM HX DESIGN OPTION 1 WILL BE CENTERED ON FABRICATION AND TESTING OF A MASS OPTIMIZED HEAT EXCHANGER FROM MEZZO. THE PROJECT WILL LEVERAGE WORK PERFORMED BY MEZZO DURING THE PHASE I EFFORT OF THE NASA SBIR. THE PHASE I SBIR WITH MEZZO YIELDED WATER PCM HX DESIGN OPTIONS THAT MET NASA REQUIREMENTS. THE REQUIREMENTS MEZZO WILL WORK TO MEET ARE OUTLINED IN TABLE 1 BELOW. THE EFFORT WILL LAST ABOUT 18 MONTHS CULMINATING WITH THE TESTING AND EVALUATION OF THE MASS OPTIMIZED PCM HX. TABLE 1. MICROTUBE WATER PCM HEAT EXCHANGER REQUIREMENTS ITEM VALUE PHASE CHANGE MATERIAL WATER COOLANT 50/50 PGW ENERGY STORAGE 450KJ MAX HX PRESSURE DROP 2.0 PSID MELTING MELT TIME 24 MIN COOLANT FLOW RATE 250 LB/HR COOLANT INLET TEMPERATURE 30 C EXIT COOLANT TEMPERATURE IDEAL