4909318 Method and apparatus for recovering heat from flue gases and for cleaning the same

New Patents 4909312 INTERFACE EQUIPMENT BETWEEN A HEAT PUMP AND A BURIED HEAT EXCHANGER Homer M Biedenbach, Eugene L Timperman An interface assembly between a heat pump and an elongated ground heat exchanger. First and second valve means are connected to opposed end portions of the ground heat exchanger. A conduit of a coolant-to-heat transfer liquid heat exchanger in the heat pump, a tank column, and pump means between the second valve means and the first valve means are connected in series between the first and second valve means.

paratus comprising a casing with heat exchange e i b ~ t s i h ~ r t e d t h ~ t o , a medium being provided for absorbing heat from the flue gas. According to the invention the medium that shall absorb heat from the flue gas is conducted through the heat exchange elements, the heat exchange elements and the connections to the casing for flue gas being so placed that the flue gas streams perpendicularly to the heat exchange elements, the flue gas being given a flow velocity cross the heat exchange elements of not more than 3 m/see. Soot in the flue gas is collected on the heat exchange elements and adsorbs and/or dissolves gaseous substances such as sulphur dioxide. The invention also relates to an apparatus for carrying out the method. 4909319

4909316

HEAT EXCHANGER

DUAL-TUBE HEAT PIPE TYPE HEAT EXCHANGER

Atuyum Ishikawa, Takeshi Kanai, Hirofumi Iinuma, Ohta, Japan assigned to Sanyo Electric Co Ltd

Mitsur Kamei, Takao Sakai, Shinichi Sugihara, Motohar Yatsuhashi, Ryuichi Okiai, Masataka Mochizuki, Mito, Japan assigned to Doryokuro Kakunenryo Kaihatsu Jigyodan; Fujikura L

A heat exchanger having an improved and substantially uniform heat exchange efficiency, provided with a plurality o f plate fins each of which has tube inserting bores arranged in a staggered manner, and heat transfer tubes inserted through these bores, a plurality of each of the fins which are between the tubes being cut doubly to a small width and raised so as to form louver elements so that the louver elements cross a flow of the air stream. The root portions of the louver elements are positioned so as to surround the inserted portions of the tubes, the louver elements consisting of central louver elements formed on both sides of the center line of the row of the tubes, and a plurality of rows of divisional louver elements formed on both sides of the central louver elements with base portions left on the regions of the fin which are on a line crossing the mentioned center line, and the length of the divisional louver elements in the outside rows farthest away from the center line is set substantially equal to the distance between the louver elements in each row and the length of the divisional louver elements in the inside rows.

Herein disclosed is a dual-tube heat pipe type heat exchanger comprising a heat pipe confined with a working fluid for transferring a heat as a latent heat by repeating evaporations and condensations. The heat pipe includes an outer tube which is disposed within a hot fluid such that its axis is generally horizontal. Further included is an inner tube which is inserted in the outer tube and radially offset upward to substantially contact with the top portion of the inner face of the outer tube and to confine a space between the inner circumference of the outer tube and the outer circumference of the inner tube, thus forming the heat pipe. 4909318 METHOD AND APPARATUS FOR RECOVERING HEAT FROM FLUE GASES AND FOR CLEANING THE SAME

4910966

Gunna Ymse, Lund, Sweden assigned to AlfaLaval Thermal AB

HEAT PUMP WITH SINGLE EXTERIOR TEMPERATURE SENSOR

The present invention relates to a method for recovering heat and separating substances from a flue gas streaming through a heat exchange ap-

Michael Levine, James Russo, Victor Rigotti, Nichola Skogler assigned to Honeywell Inc