A liquefied gas unloading and deep evacuation system may more quickly, more efficiently and more completely unload liquefied gases from transport tanks, such as rail cars, into stationary storage tanks or into truck tanks. The system may utilize a two stage compressor, an electric motor, a variable frequency drive, a four way valve, a three way valve, a two way valve, a programmable logic controller based control system and pressure and temperature transmitters. The valving enables deep evacuation of the transport or supply tank to more completely empty the transport tank. The programmable logic controller and variable speed drive may be used to variably control the speed of the two stage compressor so that the system may be running as fast as possible during changes in ambient temperature and/or different stages of offloading the liquefied gases without exceeding the compressor's horsepower limit.

A pump device for a cooling circuit of an internal combustion engine of a commercial or motor vehicle includes two electric pumps in parallel, each of which includes a switchable backflow valve in a suction line, so that the electric pumps can be operated selectively individually or in parallel.

A closing unit system for a blowout preventer (BOP) stack includes a first fluid reservoir, a first power source, a first pump system fluidly coupled to the first fluid reservoir and electrically coupled to the first power source, and a valve manifold fluidly coupled to the first pump system via a closing unit hose assembly and configured to couple to the BOP stack. The closing unit system also includes one or more processors that are configured to receive an input indicative of an instruction to adjust an actuator associated with the BOP stack, and instruct the first power source to provide power to the first pump system to cause the first pump system to pump a fluid from the first fluid reservoir to the valve manifold in response to the input.

A power-saving optimization operation method and switching point determining method for a water pump unit. In the parallel water pump units, k water pumps converters form a sub-pump unit A. The water output Q.sub.1 of a first water pump in the sub-pump unit A, the input power P.sub.1 of the frequency converter corresponding to Q.sub.1 and the operating frequency f.sub.1 of the frequency converter corresponding to Q.sub.1 are recorded, where Q.sub.A=Q.sub.1, P.sub.A=P.sub.1. The Q.sub.A-P.sub.A curve of an operating water pump serves as the working curve w.sub.1, where Q.sub.A=mQ.sub.1 and P.sub.A=mP.sub.1, and k≥m≥2. The working curve w.sub.m of m operating water pumps operating at the same frequency is obtained, where f.sub.1=f.sub.2= . . . =f.sub.m. The intersection point of the working curve w.sub.m-1 and the working curve w.sub.m is the optimal switching point between m-1 operating water pumps and m operating water pumps under the constant pressure H.sub.s.

A power-saving optimization operation method and switching point determining method for a water pump unit. In the parallel water pump units, k water pumps converters form a sub-pump unit A. The water output Q.sub.1 of a first water pump in the sub-pump unit A, the input power P.sub.1 of the frequency converter corresponding to Q.sub.1 and the operating frequency f.sub.1 of the frequency converter corresponding to Q.sub.1 are recorded, where Q.sub.A=Q.sub.1, P.sub.A=P.sub.1. The Q.sub.A−P.sub.A curve of an operating water pump serves as the working curve w.sub.1, where Q.sub.A=mQ.sub.1 and P.sub.A=mP.sub.1, and k≥m≥2. The working curve w.sub.m of m operating water pumps operating at the same frequency is obtained, where f.sub.1=f.sub.2= . . . =f.sub.m. The intersection point of the working curve w.sub.m−1 and the working curve w.sub.m is the optimal switching point between m−1 operating water pumps and m operating water pumps under the constant pressure H.sub.s.

A dual pump smart control system. The operating time and the number of simultaneous operations are analyzed and compared with a reference time and a reference number, so that a controller determines whether or not the operation is normal. Afterwards, the driving of a first pump and the driving of a second pump are differentially controlled depending on whether or not the operation is determined to be normal by the controller. Thus, a malfunction caused by the concentration of load at a specific pump is prevented. Accordingly, the dual pump smart control system precisely controls the driving of the dual pumps and enables the pumps to operate efficiently.

A vacuum pumping arrangement comprises a first pump which has a first inlet and a first outlet. The first inlet is fluidly connected to a first common pumping line. The first common pumping line includes a plurality of first pumping line inlets each of which is fluidly connectable to a least one process chamber within a group of process chambers that form a semiconductor fabrication tool. The vacuum pumping arrangement also includes a reserve pump which has a reserve inlet and a reserve outlet. The reserve inlet is selectively fluidly connectable to each process chamber within the group of process chambers that form the semiconductor fabrication tool. The vacuum pumping arrangement additionally includes a controller which is configured to selectively fluidly isolate the pump from one or more given process chambers and selectively fluidly connect the reserve pump with the said one or more given process chambers.

An automatically opening and closing inflatable holiday ornament includes a box that has a base, a plurality of side panels hingedly connected to the base, and a top portion connected to each of the plurality of side panels. The ornament further includes a motor, a plurality of pull cables, such that each of the plurality of pull cables has a first end operatively connected to the motor and a second end connected to one of the plurality of side panels. The ornament also includes a first blower, an inflatable disposed in the box and surrounding the first blower such that operation of the first blower blows air into the inflatable to inflate the inflatable, and a controller operatively connected to the motor and to the first blower such that the controller controls operation of the motor and the blower.

A controller, a water source heat pump and a computer useable medium are disclosed herein. In one embodiment the controller includes: (1) an interface configured to receive operating data and monitoring data from the water source heat pump and transmit control signals to components of thereof and (2) a processor configured to respond to the operating data or the monitoring data by operating at least one motor-operated valve of the water source heat pump via a control signal.

A system and method for operating a fleet of pumps for a turbine driven fracturing pump system used in hydraulic fracturing is disclosed. In an embodiment, a method of operating a fleet of pumps associated with a hydraulic fracturing system includes receiving a demand Hydraulic Horse Power (HHP) signal. The demand HHP signal may include the Horse Power (HP) required for the hydraulic fracturing system to operate and may include consideration for frictional and other losses. The method further includes operating all available pump units at a percentage of rating below Maximum Continuous Power (MCP) level, based at least in part on the demand HHP signal. Furthermore, the method may include receiving a signal for loss of power from one or more pump units. The method further includes operating one or more units at MCP level and operating one or more units at Maximum Intermittent Power (MIP) level to meet the demand HHP signal.