TY - JOUR
T1 - Non-uniform temperature district heating system with decentralized heat pumps and standalone storage tanks
AU - Arabkoohsar, Ahmad
PY - 2019/3/1
Y1 - 2019/3/1
N2 - In this work, the novel concept of non-uniform temperature district heating (NUTDH) system with decentralized heat pumps and standalone heat storage units (HPHS) is proposed. In the NUTDH-HPHS system, the temperature within the transmission pipeline is always at the ultra-low level of 35–40 °C, which is sufficient for space heating use. The heat pumps will increase the temperature within the distribution pipes to 70 °C during a short period of time a day. This temperature is to provide the domestic hot water (DHW) need of the consumers. Heat pumps are sized in neighborhood scale, and as each neighborhood is supplied with a high temperature just for a short time a day, each heat pump may be assigned for a few neighborhoods. As not always high-temperature water is available, the substations are equipped with storage tanks. In this system, the rate of heat loss is minimal, legionella risk is absolutely zero, and there is a strong synergy between the power and heat sectors. The system is designed and analyzed for a case study. The results are also compared with the performance of other popular district heating (DH) schemes. It is demonstrated that the NUTDH-HPHS system shows the best performance.
AB - In this work, the novel concept of non-uniform temperature district heating (NUTDH) system with decentralized heat pumps and standalone heat storage units (HPHS) is proposed. In the NUTDH-HPHS system, the temperature within the transmission pipeline is always at the ultra-low level of 35–40 °C, which is sufficient for space heating use. The heat pumps will increase the temperature within the distribution pipes to 70 °C during a short period of time a day. This temperature is to provide the domestic hot water (DHW) need of the consumers. Heat pumps are sized in neighborhood scale, and as each neighborhood is supplied with a high temperature just for a short time a day, each heat pump may be assigned for a few neighborhoods. As not always high-temperature water is available, the substations are equipped with storage tanks. In this system, the rate of heat loss is minimal, legionella risk is absolutely zero, and there is a strong synergy between the power and heat sectors. The system is designed and analyzed for a case study. The results are also compared with the performance of other popular district heating (DH) schemes. It is demonstrated that the NUTDH-HPHS system shows the best performance.
KW - District heating
KW - Non-uniform supply temperature
KW - Decentralized heat pump
KW - Standalone storage unit
KW - Stratified storage tank
UR - http://www.scopus.com/inward/record.url?scp=85060030758&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2018.12.209
DO - 10.1016/j.energy.2018.12.209
M3 - Journal article
SN - 0360-5442
VL - 170
SP - 931
EP - 941
JO - Energy
JF - Energy
ER -