Energy Savings of Simultaneous Heating and Cooling System According to Indoor Set Temperature Changes in the Comfort Range

Abstract

This study was conducted to derive the amount of energy savings when applying the method of making the load similar by changing the set temperature of the room in the building to which the simultaneous heating and cooling (SHC) system is applied. Energy savings were derived through theoretical analysis and comparisons through static simulations were performed to verify the proposed method. As a result, the energy savings are proportional to the energy limit that can be additionally input to the SHC and is proportional to the ratio of the coefficient of performance (COP) difference between the SHC and auxiliary heat source and the auxiliary heat source COP. That is, to increase the amount of energy savings, the maximum possible energy should be input for the SHC, or the SHC COP must be greater than the auxiliary heat source COP. In addition, comfort can be achieved stably by varying the set room temperature in a room with a small load. When a heat storage tank is installed or changing the indoor set temperature of both the hot and cold zones in real time by predicting the indoor load is possible, more energy can be saved.

Research Summary and Literature Review on Modelling and Simulation of Heat Pumps for Simultaneous Heating and Cooling for Buildings

“…Shin and Jeong highlight the issue of unbalanced heating and cooling demands in buildings [104]. They propose to let the indoor temperature derive to increase the operating time in a simultaneous mode.…”

Efficient PID Control Design for Frequency Regulation in an Independent Microgrid Based on the Hybrid PSO-GSA Algorithm

“…It can be connected to a network or operate in island mode, and it has many benefits for both consumers and power generation companies. From the perspective of the consumer, microgrids are able to simultaneously provide electricity and heat [1], increase reliability [2], reduce greenhouse gas emissions [3], improve the quality of power, and reduce the costs of consumption [4,5]. As for electricity companies [6], the use of microgrids has the potential to reduce consumption demand and, in turn, the facilities necessary for the development of transmission lines [7].…”

Modelling and Simulation of Heat Pumps for Simultaneous Heating and Cooling, a Special Issue

“…Shin et al present a means of saving energy for an HPS by modifying the indoor set temperature within an acceptable comfort range [4]. This method enables the operating time to be enlarged in a simultaneous mode.…”