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Ternary nitrate mixtures represent a new class of high-temperature working fluids for chemical heat pumps. Water is the refrigerant and the solute is composed of 53 wt % LiNO3, 28 wt % KNO3, and 19 wt % NaNO3. The fluid mixture is a competitor to existing chemical heat pump fluids and operates up to 260°C (500 F) without causing corrosion problems. In this paper, polynomial expressions using least square fit techniques are developed that correlate experimental vapor-liquid-equilibrium (VLE) and specific enthalpy-concentration data for the aqueous nitrate mixture. These equations are necessary for computer simulation of heat pump cycles.

Units: Dual

Citation: ASHRAE Transactions, 1988, vol. 94, pt. 2, Ottawa

Product Details

Published:
1988
Number of Pages:
10
File Size:
1 file , 600 KB
Product Code(s):
D-OT-88-3183