Performance investigation of the heat pump and power generation integration system

Abstract

Summary A novel heat pump and power generation integration system (HPPGIS) using solar energy as a low temperature heat source was presented in this study. This system could be operated in both an organic Rankine cycle power generation (ORC‐PG) mode and a reverse Carnot cycle heat pump (RCC‐HP) mode. Compared with a single heat pump and power generation system, this system improved the utilization efficiency of solar energy, thus showing potential for the generation of economic benefits. Contrastive analyses of different working fluids using ORC‐PG and RCC‐HP systems were conducted first, leading to the selection of R142b and R245fa as optimal fluids. Then, an experimental investigation of the system was carried out under different conditions. A heat pump and ORC system model was proposed and validated by comparing experimental and simulated values. The experimental results indicated that the HPPGIS had good feasibility and stability in both modes. In the ORC‐PG mode, HPPGIS had a power output of 1.29 kW and a thermal efficiency of 4.71% when the water inlet temperature of the evaporator was 90.03°C. In the RCC‐HP mode, HPPGIS had a COP of 3.16 and a heat capacity of 33.24 kW when the water outlet temperature of the condenser was 106.23°C.

Field Investigation and Comparison Analysis of Low-Grade Heat Pump Technologies in Building Space Heating Projects

“…Numerous studies have conducted the modeling design [17], simulation analysis [18] and field test [19] of different heat pump technologies. As temperature-dependent heating upgrading technologies, the energy efficiency of heat pump highly depends on the availability and quality of low-grade heat sources.…”

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

“…An application that is gaining interest is the possibility of having a reversible heat pump/ORC, where it is possible to switch between the operation as heat pump for space cooling or ORC for the production of electricity. This concept is presented in the study by Wu et al [ 130 ] and represented schematically in Figure . A similar system is proposed in the study by Palomba et al [ 131 ] : solar heat is used as source for the evaporator of a reversible heat pump/ORC for providing space heating (heat pump mode) or electricity (ORC mode) to increase the flexibility of the system in different climates and building typologies.…”

“…[137] The obtained classification, following this approach, is represented in Figure 29 and 30 for overall and specific consumption, respectively. [130] Figure 24. The solar combined cycle integrated with heat pump system.…”

Study on performance of high temperature heat pump system integrated with flash tank for waste heat recovery employed in steam production

“…Many researchers are concerned with the development of novel refrigerant mixtures or additives in pure mixtures, while much theoretical and experimental investigation has been conducted. [7][8][9][10][11][12] However, the leakage of refrigerant mixtures will lead to changes in its composition, so that the thermodynamic properties changes, the refilling of refrigerant and the high operating expenses are somewhat troublesome.…”