Differential pressure,bypass chilled/heating water systems: Criterion and procedure for balancing

Abstract

A criterion and procedure for balancing differential-pressure-bypass chilled/heating water systems is described. Theoretical analysis has been carried out which suggests that the proposed criterion is feasible. The drawback is that slight oversizing of coils is required. Advantages are simplification in balancing procedure, and achieving a higher operating differential temperature across the mains than the system design value which would allow chillers/boilers to operate to their design thermal output.

Get full access to this article

View all access options for this article.

References

Bochum P.

Pas Statische, Regelunhsverhalten von Warmeubertragem (Static control behaviour of heat exchanger)

HLH 31(8) 285-288 (1980)

Carrier, Grant, Cherne and Roberts Modern air conditioning heating and ventilating (USA: Pitman) pp 320-321 (1959)

Daikin Engineering Data Volume 3, ch. 11 (Japan: Daikin Engineering) (1992)

Automatic controls Applications Manual AMI pp 27-29 (London : Chartered Institution of Building Services Engineers ) (1985)

HVAC Systems and Equipment Handbook p12.11 (Altanta: American Society of Heating, Air-conditioning and Refrigeration Engineers ) (1992)