Heat storage materials suitable in particular for indoor air cooling

US4400286A · kind A · utility

Inventors

• Peter Schaper · Waiblingen, DE
• Oliver Laing · Tübingen, DE

Key dates

• Filing date: Jan 15, 1981
• Grant date: Aug 23, 1983
• Expiry date: Jan 15, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K5/063
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The use of Na.sub.2 CrO.sub.4.10 H.sub.2 O as a heat storage medium is disclosed. Various amounts of Na.sub.2 SO.sub.4.10 H.sub.2 O may be included to provide a melting temperature between 19.degree. C. and 31.9.degree. C. A lower melting temperature can be obtained by adding CO(NH.sub.2).sub.2. Paper sludge or waste products from the processing of sugar cane or peat can be added to increase viscosity. Auxiliary liquids such as trichlorethylene and tetrachlorethylene or silicone oils can be added to maintain pumpability of the compositions.