Multi-system heat pump

Multi-system heat pump

or a mechanical vacuum gauge. Its charging capacity is 2 or 4 kg, refrigerants used are R 12, R 22 and R 502. The vacuum pump operates at 1.8 m 3 with...

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or a mechanical vacuum gauge. Its charging capacity is 2 or 4 kg, refrigerants used are R 12, R 22 and R 502. The vacuum pump operates at 1.8 m 3 with an obtainable vacuum of 0.04 Torr. The unit's dimensions are 640 x 480 x 200 mm and it weighs 19 kg. A'Gramkow, Sondervang 3, DK-6400 Sonderborg, Denmark

Saving heat A unit which recovers waste heat from hot gas discharge pipework for all types of refrigeration and air conditioning plants is available. The capacity ranges from 1-20 tons refrigeration. Hainault Thermal Services claim that for a plant of 7.5 ton refrigeration capacity using 38-64 gallons (1 73-291 l) of hot water per hour, the unit will pay for itself in nine months. A plant rated at 20 ton refrigeration will pay for itself in six months. The units are of modular stainless steel construction with a copper heat exchanger and can be connected in parallel. Hainault Thermal Services Limited, 19-21 Fowler Road, Hainault, Ilford, Essex, UK

Cold storage equipment Cold storage equipment is to be supplied for a new Central Store in Kuwait, by Electrolux Constructor.

The 40 000 m 2 Central Medical Store is being built for Kuwait's Ministry of Public Health. It will be a fully computerized cold storage and distribution centre for pharmaceutical products. The store will serve all hospitals, clinics and other medical institutions within the health sector in Kuwait. The system has been designed for high-rise density storage. It comprises 2 km of PKZ FIFO racks holding 2 6 0 0 0 roll containers and 13 km of FIFO racks holding 2 0 0 0 0 plastic boxes. In addition, there are large quantities of drawer cabinet installations for the storage of small, high value items. Electrolux Constructor, PO Box 18, Oakley Road, Luton LU4 9QE, UK

Multi-system heat pump from Toshiba. There is a wall mounted unit (above) or floor-standing unit (below)

Mobile hose crimping

M ulti-system heat pump

Air conditioning dealers and service centres can now make their own top quality high pressure hose assemblies quickly, conveniently and economically. The Salmon Mini Crimp will enable a technician to safely produce custom-made hoses with fittings and unions. The Mini Crimp is completely portable for mobile crimping work, or can be bench mounted. It is suitable for standard barb automotive pushon fittings and ferrules and only requires a ratchet and socket or impact wrench to make perfect hose assemblies every time. Salmon Diavia Artico, Thames Ditton, Surrey, UK

Teddington moves to Cornwall Teddington Refrigeration Controls Limited have moved to St Austell in Cornwall. This is to stream-line the administration of refrigeration sales and give better service to customers. The Hayes, Middlesex. offices have now been closed. A model of the new Central Medical store in Kuwait where Electrolux Constructor are supplying cold storage equipment

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Teddington Refrigeration Controls Ltd, Holmbush Estate, St Austell, Cornwall PL25 3HS, UK

A multi-system air-to-air heat pump is to be launched in Britain in 1982 by Toshiba. Operating on single phase 240 V ac mains and with a COP of 285% at 7°C ambient temperature, the heat pump is designed to provide heating and air conditioning for the modern, well insulated home and office suite. The system comprises an outdoor condenser unit which can be teamed up with four indoor fan coil units, each capable of delivering 12 000 Btu heating, or 8000 Btu cooling comfort. With the wall mounted unit, the air flow rate is 8.5 m 3 min -~, whilst with the floor standing version, the rate is 7.2 m 3 min -1. Both models remove moisture at a rate of 1.2 I m i n - 1 The RBZ 23 HE mixing unit allows two internal fan coil units to be run off one condenser circuit in what Toshiba describes as a 'lead-lag' arrangement. Whichever one of the pairs is switched on first becomes the lead machine, and whilst it is providing heating/cooling the other runs on fan only. Once the lead machine has achieved the

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desired room temperature, the RBZ23 mixing unit automatically switches in the lag machine, until it also achieves the desired temperature. The system then becomes self-balancing as required. The Toshiba multisystem is designed to operate at

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temperatures well below freezing and is perfectly suitable for use in temperate climates. At - 5 ° C the system operates with an efficiency of 182% giving 7300 Btu of usable heat. An auto defrost circuit is incorporated in the multisystem whereby a frost sensor in the

outdoor condenser unit causes hot gas to circulate in the condenser coils. Defrosting takes about 30 s, during which time the fan coil heating units cease to run and an indicator light warns the user that defrosting is taking place. Toshiba (UK) Limited, Frimley, Surrey, UK

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the journal of the economics, planning and politics of food and agriculture

For further information or sample copy contact Jan Holloway Butterworth Scientific Limited - - Journals Division PO Box 63 Westbury House Bury Street Guildford Surrey GU2 5BH England Telephone 0483 31261 Telex SCITEC G

Volume 5 Num6ro 4 Juillet 1982

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