An onboard system for winterizing vessels includes an antifreeze storage system. The onboard system includes a control system capable of determining one or more of the one or more system components to be winterized, an antifreeze storage system, and one or more pumps capable of pumping antifreeze from the antifreeze storage system. The antifreeze flows through the determined one or more system components to be winterized.

The present invention relates to a distribution pump arrangement for a bi-directional hydraulic distribution grid (10). The distribution pump arrangement comprising: a hot conduit control valve (20) in a hot conduit (12); a first distribution pump (22) having an inlet (22a) connected to the hot conduit (12) at a first side (20a) of the hot conduit control valve, and an outlet (22b) connected to the hot conduit (12) at a second side (20b), opposite the first side (20a), of the hot conduit control valve (20); a pressure difference determining device (80, 80′) arranged beyond the second side of the hot conduit control valve (20) and configured to determine a local pressure difference, Δp, between a local pressure, p.sub.hot, of heat transfer liquid in the hot conduit (12) and a local pressure, p.sub.cold, of heat transfer liquid in the cold conduit (14); and a controller (90) configured to: while Δp<a threshold value, set the distribution pump arrangement in a flowing mode, wherein: the first distribution pump (22) is set to be inactive, and the hot conduit control valve (20) is set to be open, while Δp≥the threshold value and p.sub.cold>p.sub.hot, set the distribution pump arrangement in a hot conduit pumping mode, wherein: the hot conduit control valve (20) is set to be closed, and the first distribution pump (22) is set to be active, thereby reduce the local pressure difference.

A demand based control for a hydronic heating system varies the heat response based on an actual demand of the conditioned space, rather than an estimated thermal loss. Differences between supply and return of a heat transfer medium, such as forced hot water, are measured for the conditioned space, as well as the flow rate of the forced water to determine an actual thermal transfer to the conditioned space. A required heat generation is computed based on the measured transfer and resultant temperature change of the conditioned space, and heat generation parameters such as boiler firing rate and circulator pump speed varied to control the heat transfer to the conditioned space and avoid overshoot or excessive heat generation beyond that needed for the measured demand.

A receiver, a receiver assembly and a heat pump system. The receiver includes a first pipe, a second pipe and a third pipe leading to the cavity of the receiver, wherein the first pipe, the second pipe and the third pipe connect to a first load unit, a second load unit and a cold and heat source unit, respectively.

An onboard system for winterizing vessels includes an antifreeze storage system. The onboard system includes a control system capable of determining one or more of the one or more system components to be winterized, an antifreeze storage system, and one or more pumps capable of pumping antifreeze from the antifreeze storage system. The antifreeze flows through the determined one or more system components to be winterized.

The present invention relates to a distribution pump arrangement for a bi-directional hydraulic distribution grid (10). The distribution pump arrangement comprising: a hot conduit control valve (20) in a hot conduit (12); a first distribution pump (22) having an inlet (22a) connected to the hot conduit (12) at a first side (20a) of the hot conduit control valve, and an outlet (22b) connected to the hot conduit (12) at a second side (20b), opposite the first side (20a), of the hot conduit control valve (20); a pressure difference determining device (80, 80′) arranged beyond the second side of the hot conduit control valve (20) and configured to determine a local pressure difference, Δp, between a local pressure, p.sub.hot, of heat transfer liquid in the hot conduit (12) and a local pressure, p.sub.cold, of heat transfer liquid in the cold conduit (14); and a controller (90) configured to: while Δp<a threshold value, set the distribution pump arrangement in a flowing mode, wherein: the first distribution pump (22) is set to be inactive, and the hot conduit control valve (20) is set to be open, while Δp≥the threshold value and p.sub.cold>p.sub.hot, set the distribution pump arrangement in a hot conduit pumping mode, wherein: the hot conduit control valve (20) is set to be closed, and the first distribution pump (22) is set to be active, thereby reduce the local pressure difference.

A passive flow divider for providing outflows is described. The passive flow divider includes at least one inlet for an inflow and a plurality of outlets for said outflows, a housing enclosing a main partition that separates an intake space and a discharge space, a common end located at an interface between the intake space and the discharge space, and a baffle arranged in the intake space between said inlet and the common end. The passive flow divider further includes a plurality of distribution chambers arranged in the discharge space and adjacent to each other, each distribution chamber being arranged to lead an outflow from the common end to one of the outlets.

An onboard system for winterizing vessels includes an antifreeze storage system. The onboard system includes a control system capable of determining one or more of the one or more system components to be winterized, an antifreeze storage system, and one or more pumps capable of pumping antifreeze from the antifreeze storage system. The antifreeze flows through the determined one or more system components to be winterized.

A passive flow divider for providing outflows is described. The passive flow divider includes at least one inlet for an inflow and a plurality of outlets for said outflows, a housing enclosing a main partition that separates an intake space and a discharge space, a common end located at an interface between the intake space and the discharge space, and a baffle arranged in the intake space between said inlet and the common end. The passive flow divider further includes a plurality of distribution chambers arranged in the discharge space and adjacent to each other, each distribution chamber being arranged to lead an outflow from the common end to one of the outlets.

An onboard system for winterizing vessels includes an antifreeze storage system. The onboard system includes a control system capable of determining one or more of the one or more system components to be winterized, an antifreeze storage system, and one or more pumps capable of pumping antifreeze from the antifreeze storage system. The antifreeze flows through the determined one or more system components to be winterized.