A monitoring system for a heating, ventilation, and air conditioning (HVAC) system of a building includes a monitoring device installed at the building, a monitoring server located remotely from the building, and a review server. The monitoring device measures an aggregate current supplied to components of the HVAC system and transmits current data based on the measured aggregate current. The monitoring server receives the transmitted current data and, based on the received current data, assesses whether failures have occurred in first and second components of the HVAC components. The monitoring server generates a first advisory in response to determining that the failure has occurred in the first component. The review server provides the first advisory to a technician for review and, in response to the technician verifying that the failure has occurred, transmits a first alert.

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Hvac system remote monitoring and diagnosis

A monitoring system for a heating, ventilation, and air conditioning (HVAC) system of a residence includes a monitoring device installed at the residence and a server located remotely from the residence. The monitoring device measures an aggregate current supplied to a plurality of components of the HVAC system and transmits current data based on the measured aggregate current. The server receives the transmitted current data and, based on the received current, assesses whether a failure has occurred in a first component of the plurality of components of the HVAC system and assesses whether a failure has occurred in a second component of the plurality of components of the HVAC system.

Residential solutions hvac monitoring and diagnosis

A residential HVAC system includes a heat pump (14) having a compressor (24) arranged to heat a domestic hot water vessel (S2) and to heat or cool a storage vessel (S1) which is connected to a heat exchanger (HX-1) within the residence. Temperature sensors (A, B, C, D, F, G, H) are provided at critical locations throughout the system and voltage sensors are coupled to the power lines feeding the residence. A microprocessor (45) controls the operation of the compressor (24) and other components of the heat pump system in response to measured temperatures, in response to the level of energy supplied to the residence and in response to the existence of on- or off-peak time intervals to operate the compressor (24) and/or resistive heating elements (40, 42) to condition the hot water and storage vessels (S1, S2) for subsequent use and to control an interior fan (34) to condition the space. Operation of the compressor (64) is controlled during on-peak intervals as a function of the resident's life style as reflected in power usage and requested comfort level.

Residential heating, cooling and energy management system.

A system and method for managing energy consumption of a building system includes a source of actual energy consumption data (430), a source of actual weather data (440), and a database (420) correlating discrete weather data values with expected energy consumption values for at least one component of the building system. A computer accesses the actual weather data, actual energy consumption data (430) and database (420), wherein the computer compares (450) the expected energy consumption values with actual energy consumption data and generates an output (470) based on the comparison. The expected energy consumption values are generated for the discrete weather data values using an energy consumption model that functionally relates discrete weather data values and design information for the buiding system component.

Model-based alarming

A system and method for monitoring the food product and refrigeration system performance of a remote location includes a management center in communication with a remote location through a communication network. The management center receives performance information of the refrigeration system at a remote location. The management center employs software modules to analyze the performance information, diagnose system conditions, and provide alarms for food safety and quality issues, refrigeration system component failure, and indicate maintenance conditions.

System for remote refrigeration monitoring and diagnostics

A heat pump air conditioning system with an active digital control of the refrigeration cycle thereof to improve the coefficient of performance. The system can incorporate solar collectors in parallel with the outdoor heat exchanger and a water storage tank in the system to maximize the utilization of solar heating and nocturnal cooling as an additional heat source or heat sink means when such are available to further improve the coefficient of performance. The system also incorporates individual temperature control mechanisms in each room to circulate an adequate amount of water from the storage tank in accordance with the heat demand of each room, thus contributing to realization of an energy efficient central air conditioning system.

Heat pump air conditioning system

A multi-mode water heating system wherein a capacity control mechanism is provide so that no additional heat source is required and via use of capacity control, either solar radiation energy or ambient air energy is selectively utilized dependent on the availability of sunshine. A system configuration is so arranged as to maximize the system seasonal coefficient of performance by a refrigeration cycle optimization which adjusts both a pump/compressor speed and pressure regulating valve opening.

Integral solar and heat pump water heating system

A water heating system comprising an outdoor heat exchanger including a heat collection chamber, solar collector panels, collector fins, an evaporator for passing refrigerant therethrough to perform the heat exchange between the refrigerant and the heat transferred from the panels and fins to evaporate the refrigerant. The panels, fins and evaporator are incorporated integrally in the heat collection chamber. A variable rotational speed compressor is connected to the outdoor heat exchanger for compressing the vaporized refrigerant from the evaporator. A heat exchanger disposed on the bottom side in the water storage tank passes the refrigerant vapor from the compressor to perform the heat exchange between the water in the tank and the refrigerant vapor to condense the refrigerant vapor. A variable opening expansion valve adiabatically expands the refrigerant liquefied by the heat exchanger in the tank, thereby decreasing the pressure and temperature of the refrigerant and supplies the refrigerant thus adiabatically expanded to the outdoor heat exchanger. A control unit controls the rotational speed of the compressor and the opening of the expansion valve to maximize the coefficients of performance of the refrigeration cycle in response to the pressures and temperatures measured at various portions in the refrigeration cycle.

Hozo Yoshino

Papers

Heat pump air conditioning system

Integral solar and heat pump water heating system

Water heating system