An absorption chiller includes a heating medium supply pipe configured to supply a heating medium from a heating medium pipe to a cooling water pipe; a cooling water discharge pipe configured to discharge a cooling water from the cooling water pipe to the heating medium pipe; a control valve provided on the heating medium supply pipe and the cooling water discharge pipe, respectively; and a controller configured to cause the control valve to be opened and to cause the heating medium in the heating medium pipe to be introduced into the cooling water pipe, when a temperature detected by a cooling water temperature detector is equal to or lower than a predetermined temperature, in a wet lay-up state including a state in which a cooling water inlet shut-off valve and a cooling water outlet shut-off valve are closed and the cooling water pipe is filled with the cooling water.

There is disclosed a heat-transferring device comprising a buffer tank (1), a reactor vessel (2) in thermal contact with the buffer tank, wherein an active substance is held inside the reactor vessel, a burner (A), a reactor heating loop adapted to transfer heat from the burner to the active substance in the reactor vessel, a reactor cooling loop adapted to transfer heat from the active substance in the reactor vessel to the buffer tank, a volatile liquid reservoir (14) in fluid contact with the reactor vessel, an evaporator (15) in fluid contact with the volatile liquid reservoir, a volatile liquid in the volatile liquid reservoir, with the ability to be absorbed by the active substance at a first temperature and desorbed by the active substance at a higher temperature, an exhaust gas pipe (10,11,12) from the burner to the volatile liquid reservoir to heat it.

There is disclosed a heat-transferring device comprising a buffer tank (1), a reactor vessel (2) in thermal contact with the buffer tank, wherein an active substance is held inside the reactor vessel, a burner (A), a reactor heating loop adapted to transfer heat from the burner to the active substance in the reactor vessel, a reactor cooling loop adapted to transfer heat from the active substance in the reactor vessel to the buffer tank, a volatile liquid reservoir (14) in fluid contact with the reactor vessel, an evaporator (15) in fluid contact with the volatile liquid reservoir, a volatile liquid in the volatile liquid reservoir, with the ability to be absorbed by the active substance at a first temperature and desorbed by the active substance at a higher temperature, an exhaust gas pipe (10,11,12) from the burner to the volatile liquid reservoir to heat it.

An absorption chiller includes a heating medium supply pipe configured to supply a heating medium from a heating medium pipe to a cooling water pipe; a cooling water discharge pipe configured to discharge a cooling water from the cooling water pipe to the heating medium pipe; a control valve provided on the heating medium supply pipe and the cooling water discharge pipe, respectively; and a controller configured to cause the control valve to be opened and to cause the heating medium in the heating medium pipe to be introduced into the cooling water pipe, when a temperature detected by a cooling water temperature detector is equal to or lower than a predetermined temperature, in a wet lay-up state including a state in which a cooling water inlet shut-off valve and a cooling water outlet shut-off valve are closed and the cooling water pipe is filled with the cooling water.

An absorption heat pump having a generator, a heat source to heat the generator to drive coolant vapor out of solution, a condenser for cooling the coolant vapor and an expansion valve that expand the coolant fluid as well as an evaporator for at least partial evaporation of the expanded coolant fluid against a medium which is connected to at least one absorber which absorbs the expanded coolant fluid. A hot gas line which branches off from a line for coolant vapor upstream of the condenser and is fluid-connected to the evaporator such that it bypasses the condenser and the expansion valve, a defrosting valve being provided in the hot gas line, by means of which the flow of coolant vapor through the hot gas line can be controlled. The absorption heat pump is operated in a cyclic circulation process.

A sorption heat pump including a gaseous refrigerant and a liquid solvent; a diluted solution and a concentrated solution, wherein the diluted solution and the concentrated solution are single phase mixes of the solvent and the refrigerant; an absorber in which the diluted solution absorbs the refrigerant at a high-pressure level and emits a first heat; and a cooling device including plural cooling registers, each cooling register including an air cooler and an expansion valve in which the concentrated solution is expanded to a low-pressure level during normal operation of the cooling register so that the concentrated solution absorbs a second heat from ambient air in the air cooler and expels the refrigerant, wherein each air cooler is defrostable individually by supplying a third heat to the air cooler in a defrost operation of the air cooler that interrupts the normal operation of the air cooler.

An absorption heat pump having a generator, a heat source to heat the generator to drive coolant vapor out of solution, a condenser for cooling the coolant vapor and an expansion valve that expand the coolant fluid as well as an evaporator for at least partial evaporation of the expanded coolant fluid against a medium which is connected to at least one absorber which absorbs the expanded coolant fluid. A hot gas line which branches off from a line for coolant vapor upstream of the condenser and is fluid-connected to the evaporator such that it bypasses the condenser and the expansion valve, a defrosting valve being provided in the hot gas line, by means of which the flow of coolant vapor through the hot gas line can be controlled. The absorption heat pump is operated in a cyclic circulation process.

The heat pump system comprises an indoor unit and an outdoor unit communicated through a refrigerant pipeline. The outdoor unit comprises a compressor, a first heat exchanger, a first throttling device, and a change-over valve. The indoor unit comprises a second heat exchanger. A heat storage unit is arranged on the refrigerant gas-phase pipeline between the indoor unit and the outdoor unit, the heat storage unit comprising a first branch and a second branch arranged in parallel. The first branch is provided with a heat storage heat exchanger and a second throttling device, and the second branch is provided with a control valve device capable of cutting off refrigerant flowing through the second branch in a controlled manner. The heat pump system can operate in a cooling mode, a heating mode, a heat storage and heating mode, and a defrosting mode.