| 摘要 |
A controller can be connected to a heat transfer system including pressure and temperature sensors, an electrically controlled valve, and a compressor. The controller can be configured to control the heat transfer system according to compressor suction superheat, compressor discharge superheat, compressor suction pressure, compressor discharge pressure, and temperature of water received at a condenser to be heated by waste-heat bearing fluid in an evaporator. The controller can include a touchscreen configured to display a user control interface configured to display views based on a permissions database defining different types of users. The views can include different views having different input fields, output fields, and output graphs. The permissions database can permit input of control loop parameters by one of the different types of users and prevent input of control loop parameters by another of the different types of users. |
| 主权项 |
1. A heat transfer system comprising:
a compressor for circulating a working fluid, the compressor having an inlet and an outlet, the compressor operable at a controllable operating capacity; a condenser connected to the outlet of the compressor, the condenser configured to receive flow of water to be heated; an electrically controlled valve positioned to receive the working fluid from the outlet of the condenser; an evaporator connected between an outlet of the electrically controlled valve and the inlet of the compressor, the evaporator configured to receive flow of waste-heat bearing fluid; pressure and temperature sensors positioned to measure pressures and temperatures of the heat transfer system; and a controller connected to the pressure and temperature sensors, the electrically controlled valve, and the compressor, the controller configured to control the heat transfer system according to one or more of compressor suction superheat, compressor discharge superheat, compressor suction pressure, compressor discharge pressure, and water temperature, the controller including a touchscreen configured to display a user control interface configured to display one of a first view, a second view and a third view based on a permissions database defining different types of users, wherein the different types of users include an operator user type having permission to access the first view, a superintendant user type having permission to access the second view, and a manufacturer user type having permission to access the third view:
the first view including a compressor capacity graph, a hot water temperature output field to display a current hot water temperature, and a hot water input field to adjust a hot water set point;the second view including the compressor capacity graph, a compressor suction superheat graph, a compressor discharge superheat graph, the hot water temperature output field, a compressor inlet temperature output field, a compressor outlet temperature output field, and a first plurality input fields to adjust the hot water set point, a suction superheat setpoint, a minimum discharge superheat temperature, and a maximum suction pressure; andthe third view including the compressor capacity graph, the compressor suction superheat graph, the compressor discharge superheat graph, the hot water temperature output field, the compressor inlet temperature output field, the compressor outlet temperature output field, error code output fields, and a second plurality input fields to adjust the hot water set point, the suction superheat setpoint, the minimum discharge superheat temperature, the maximum suction pressure, and a plurality of control loop parameters (PID) to control a suction superheat control loop, a discharge superheat control loop, and a suction pressure control loop. |
