Abandoning peat in a city district heat system with wind power, heat pumps, and heat storage

Incorporating the Variability of Wind Power with Electric Heat Pumps

With the mass introduction of wind power in Northern China, wind power variability has appeared. In this article, both existing electric heat pumps (EHPs) and coal-fired combined heat and power (CHP) facilities, which are generally equipped with extraction-condensing steam turbines coupled with district heating for space heating purposes, are proposed to incorporate the variability of wind powe...

Value of electric heat boilers and heat pumps for wind power integration

Direct heat projects and heat pumps

Geothermal Heat Pumps, or Ground Source Heat Pumps (GSHP), are systems combining a heat pump with a ground heat exchanger (closed loop systems), or fed by ground water from a well (open loop systems). They use the earth as a heat source when operating in heating mode, with a fluid (usually water or a water-antifreeze-mixture) as the media transferring the heat from the earth to the evaporator o...

A Fault Diagnosis System for Heat Pumps

During the operation of heat pumps, faults like heat exchanger fouling, component failure, or refrigerant leakage reduce the system performance. In order to recognize these faults early, a fault diagnosis system has been developed and verified on a test bench. The parameters of a heat pump model are identified sequentially and classified during operation. For this classification, several ‘hard’...

Thermochemical Storage of Heat from a Combined Heat and Power Plant: a System Approach

Description Thermal energy storage systems have been identified as a promising solution to reduce energy consumption by reducing the mismatch between heat demand and heat supply. Compared to other thermal energy storage systems, thermochemical storage (TCM) has some main advantages: it has a potential higher energy density and thermal energy can be stored for a long period without substantial h...