## Info

¿-(from h) is greater than ¿(from v) at ISO and 160°C, so the solution cannot lie between these two temperatures. However, at 170°C, *(from h) is smaller than jc(from v), so the solution must lie between this temperature and 160°C. Linear interpolation provides the final solution.

¿-(from h) is greater than ¿(from v) at ISO and 160°C, so the solution cannot lie between these two temperatures. However, at 170°C, *(from h) is smaller than jc(from v), so the solution must lie between this temperature and 160°C. Linear interpolation provides the final solution.

¿(from v)-0.388 = *(from h)-0.396 0.494 - 0.388 ~ 0.381-0.3%

This problem illustrates the potential benefits of a computer program containing the thermodynamic data for water in the steam tables and algorithms for calculating the state of the system given any two properties (or one property and the quality). Fortunately, a number of sites on the Web provide numerical values of water properties just by entering the conditions (e.g., saturated steam at 150°C).

2.7.2 Single-Phase Superheated Vapor—Compressed Liquid

Tables 2.3 and 2.4 list the properties of water in its single-phase superheated vapor and compressed liqjiid states. The term "superheated vapor" means that the vapor temperature is greater than the saturation temperature at a specified pressure. The isobars KL and GH in the T-v diagram of Figure 2.9 arise from the entries and equations in Table 2.3. The term "compressed liquid" applies to liquid water at temperatures below the saturation temperature at a specified pressure. Alternatively, if the temperature is specified, a compressed liquid is one that is overpressurized compared to the saturated liquid. The numbers in Table 2.4 correspond to the isobars

## Getting Started With Solar

Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.

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