Donald H Spethmann

42146267, Jul 29, 1980

Sep 5, 1978

5/939513

Donald H. Spethmann - Arlington Heights IL

Honeywell Inc. - Minneapolis MN

F25B 2900

165 29

An air conditioning control system is disclosed for controlling a refrigeration unit located in a building which has both interior zones and exterior zones, the refrigeration unit being capable of supplying both chilled water for cooling and hot water for heating. The hot water temperature is controlled by first controlling the amount of heat rejected by a cooling tower, then by controlling the position of an outdoor air damper as a source of free cooling, then by overriding both the chilled water and hot water temperature controllers and finally by controlling the amount of fuel heat supplied to the hot water. The chilled water temperature controller is overridden to lower the chilled water temperature thus increasing the rejected heat from the refrigeration unit. The hot water temperature controller is overridden to increase the rejected heat supplied by the refrigeration unit.

40449475, Aug 30, 1977

Jun 1, 1976

5/691668

Donald H. Spethmann - Arlington Heights IL

Honeywell Inc. - Minneapolis MN

F24F 1304

236 13

In an air conditioning system wherein the outdoor air and recirculated air mixing dampers are operated to control the volume and condition, such as temperature, of the mixture of outdoor air and return air to be discharged to at least one zone, a control apparatus is disclosed having sensors for sensing the condition and volume of the mixture and a control system responsive to the sensors for controlling the operation of the outdoor air and recirculated air dampers for maintaining a predetermined condition and a predetermined volume of the mixture. In addition, an exhaust air damper may also be provided, controlled by the control system, for regulating the amount of air returned for the system.

41472969, Apr 3, 1979

Dec 9, 1977

5/859505

Donald H. Spethmann - Arlington Heights IL

Honeywell Inc. - Minneapolis MN

G05D 2312

236 1B

In a system for limiting power consumption during peak power consuming periods, a proportional demand limit controller is disclosed having a condition sensor for sensing the condition of air being supplied to a space, a reset circuit responsive to the condition sensor for controlling a load connected thereto for in turn controlling the condition of the air being supplied to the space, and a proportional demand controller for sensing load consumption of the loads within a building and for resetting the reset circuit in a manner to maintain the power consumption of the building loads below a predetermined demand limit.

43275591, May 4, 1982

Mar 2, 1981

6/239792

Donald H. Spethmann - Arlington Heights IL

Honeywell Inc. - Minneapolis MN

F25D 1700
F24F 700

62179

A control system for minimizing the total energy consumed by an air conditioning system of a building is disclosed having a sensor for sensing the energy expended by the fan of the air conditioning system, a sensor for sensing the energy expended by the chiller of the air conditioning system, and a controller responsive to the fan energy sensor and the chiller energy sensor for controlling the air conditioning system so that the total energy consumed by the fan and chiller systems is minimized.

44635745, Aug 7, 1984

Mar 15, 1982

6/358497

Donald H. Spethmann - Arlington Heights IL

Honeywell Inc. - Minneapolis MN

F25B 700
H02J 100

62175

A system for meeting building air conditioning load conditions by optimally selecting a combination of chillers having dissimilar efficiency characteristics, the system having a load sensor for sensing building load a refrigerant head sensor for sensing refrigerant head of the chillers, and a controller connected to the load sensor and to the refrigerant head sensor for sorting the chillers according to their efficiency characteristics data with the chiller having a minimum kw/ton versus capacity point being ranked first and for selecting a combination of the chillers which will require a minimum energy input to meet building load conditions.