Grundfos Holding A/s

Casper Hillerup Lyhne

Peter Elvekjær

Agisilaos Tsouvalas

A hydronic system () includes a side () with a first port () connected with a source element output (), a second port () connected with a source element input (), and a controllable primary side flow actuator () for providing a primary side flow (q). Another side () has a third port () connected with a load element input (), a fourth port () connected with a load element output (), and a controllable secondary side flow actuator () providing a secondary side flow (q). A transfer element () is connected with the first port, the second port, the third port and the fourth port. A flow control module () adapts a transfer element thermal power transfer by controlling the primary side flow actuator and/or the secondary side flow actuator by minimizing a signed deviation value (&#x394;&#x394;v) that is correlated with the transfer element thermal power transfer.

Flow control module and method for controlling the flow in a hydronic system

A method carries out an outside temperature-dependent control of at least one thermal power indicative parameter of a supply temperature of a first heating or cooling system in a first building (H). The control is carried out on the basis of the at least one thermal power indicative parameter. The at least one thermal power indicative parameter is indicative of the heat consumption or of the cooling power of at least one second heating or cooling system of a second building (H', H&#x2033;, H&#x2032;&#x2033;), located at a distance from the first building, and is received via a data network (), in particular, via the Internet. An arrangement is provided for controlling a first heating or cooling system of a first building, wherein the arrangement is adapted to carry out the method mentioned above. A server is further provided that is adapted to receive at least one thermal power indicative parameter.

Method for carrying out an outside temperature-related control

A multi-pump control system includes a processing module, a communication interface, a storage module and a control module configured to ramp up a speed of k pumps in addition to a subset j of i pumps of a system comprising N pumps running at a speed &#x3c9;providing a total head &#x394;p, wherein N&#x2265;2, 1&#x2264;k&#x3c;N and 1&#x2264;i&#x3c;N, and to ramp down the i pumps of the subset j from the speed &#x3c9;to a lower speed &#x3c9;that is required for a subset m of i+k pumps to provide the total head &#x394;p, and/or configured to ramp down the speed of k pumps of the subset j of i pumps and to ramp up the i-k pumps of a residual subset r from the speed &#x3c9;to a higher speed &#x3c9;that is required to provide the total head &#x394;p.

Multi-pump control system with power consumption optimization

A multi-pump control system includes a control module, a processing module, a communication interface, and a storage module. The control module is configured to run a zero flow configuration cycle by either ramping up the speed of at least one pump in addition to a subset j of i pumps of a multi-pump system until the communication interface receives a signal change indicative of the at least one pump starting to contribute to the total flow, wherein the processing module is configured to determine an approximated pump characteristic or power consumption or ramping down the speed of at least one pump of a subset j of i pumps of a multi-pump system until the communication interface receives a signal change indicative of the at least one pump stopping to contribute to the total flow, wherein the processing module is configured to determine an approximated pump characteristic and/or power consumption.

A multi-pump control system includes a control module, a processing module, a communication interface, and a storage module. The control module runs n different subsets of i pumps of a multi-pump system including N pumps during n different configuration cycles at a speed &#x3c9;, wherein N&#x2265;2, 2&#x2264;n&#x2264;2&#x2212;1 and 1&#x2264;i&#x2264;N. Each configuration cycle j&#x2208;{1, . . . , n} is associated with a subset j&#x2208;{1, . . . , n} and a speed &#x3c9;. The communication interface receives signals indicative of operational parameters from each subset j during the associated configuration cycle j. The processing module determines an approximated pump characteristic &#x394;p=f(q, &#x3c9;) based on the received signals for each subset j and under an assumption that the i pumps of each subset j share the same part q/i of a reference flow q. The storage module stores the approximated pump characteristic &#x394;p=f(q, &#x3c9;) or parameters indicative thereof.

The present invention relates to a method for controlling a pump for feeding fluid (F) into a heating system (). The heating system has a hot fluid tank (HFT) receiving fluid from an associated fluid reservoir line () with an incoming fluid mass flow rate (dm/dt). A pump (P) receives fluid from the line, and pumps the received fluid with a mass flow rate (dm/dt). A heat exchanging unit (HX) transfers heat (Q) to the fluid (F) from a medium (R). The transferred heat (Q) is maximized by controlling the pump (P) in response to this information indicative of the transferred heat (Q), the fluid mass flow rate delivered by the pump thereby having a minimum as a function of the incoming fluid mass flow rate (dm/dt) when maximizing the transferred heat. The invention provides significantly improved heat transfer to the fluid and power savings for the pump. The invention also relates to a heating system, e.g. a heat pump system.

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Aabyhøj, Denmark

Casper Hillerup Lyhne