Most Finnish residential buildings have been built before ventilation heat recovery options became mandatory. Exhaust air pumps are an effective way to reduce emissions, but they cannot cover all heating demand. Ground-source can be designed meet loads, require corresponding amounts of space both above and below ground. This simulation study combines sewage waste with a ground-source pump syste...

Based on field data from a medium scale ammonia based milk refrigeration plant located in northern part of India, a trans-critical CO2 based heat pump system is conceptualized to utilize the waste heat from the plant to improve overall coefficient of performance. Year round plant operating data is collected. The plant handles in the range of 0.1 to 0.15 million liters of milk and milk products ...

Abstract In this paper, the performance of a reversible Dual-Source Heat Pump (DSHP) system, able to exploit renewable energy from, alternatively, air and ground sources, is evaluated by using Matlab-Simulink. The actual source exploited depends on simple control strategy basis current external temperature. Yearly dynamic simulations have been carried out coupling DSHP detached residential buil...

Sewage is a kind of ideal low-temperature heat sources. Sewage heat source pump system uses heat energy in sewage, and it is a method of utilizing sewage resources. In this article we analyze sewage’s characteristics and sewage source heat pump system; introduce its practical applications in sewage treatment plants in China, analyze its technical and economic characteristics, and discuss its ap...

For ground-source heat pump (GSHP) installations, it is important to predict the thermal performance and economic feasibility prior to the introduction of the system. Numerical modelling can be used as an analytical method to accurately predict the thermal performance of such system. It is desirable that the modelling to incorporate seasonal variation during long period of operation, which woul...