This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... a higher temperature than the boiling point at that pressure, vaporizes into steam. From the above it will be seen that a vacuum system can produce no pressure below atmospheric on an engine or turbine at the exhaust outlet. The best results are obtained when about 2 or 3 in. of vacuum are maintained on the return of ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... a higher temperature than the boiling point at that pressure, vaporizes into steam. From the above it will be seen that a vacuum system can produce no pressure below atmospheric on an engine or turbine at the exhaust outlet. The best results are obtained when about 2 or 3 in. of vacuum are maintained on the return of the radiators or just enough to assure the rapid removal of the air leakage and condensation. 17/. High Pressure Steam.--When high pressure live steam is used for heating up to 20 lb., the water may be returned to the boiler by a return trap, a tilting tank that alternately connects the tank with the system, filling with water, and then by its added weight due to the condensation, tilting and connecting with the higher pressure steam in the boiler. As the tank is placed above the water line with checks to temporarily shut off the heating system, the water seeks its level in the boiler. When empty, the tank tilts back and an air valve relieves the residual pressure, shutting off the boiler steam. The pressure in the heating system forces in another charge and the operation is repeated. The same arrangement may be used for kitchen fixtures and high pressure drips on power plants, returning the condensation direct to a high pressure boiler. The circuit being sealed, it is very economical. 17(7. Hot Water Heating in Connection with Condensing Reciprocating Engines.--It is possible to operate a hot water heating system with partial vacuum on a reciprocating engine but the range in vacuum and steam rate is not very great, due to the necessary changes in compression. The valves have to be set differently for condensing and for noncondensing. There are engines provided with facilities so the valve rods may be cha nged quickly but there has been seriou...
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Good. Cover and edges shows shelf wear. Former owner's name on front page. Pages are clean and intact. Very Clean Copy-Over 500, 000 Internet Orders Filled.
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Seller's Description:
UsedAcceptable. Hardcover with flexible covers; Volume 2 only; stated first edition, second impression; compiled by a staff of 46 specialists; surplus library copy wi th the usual stampings; reference number taped to spine; one-inch strip on covers brushed with shellac; fading and shelf wear to exterior; bumps to co rners and edges; crease to front cover; fading to pages; binding reinforced and repaired at spine; otherwise in acceptable condition with clean text.
